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Environmental Protection Agency § 131.32 

or authorized Tribe’s applicable water 

quality standard for purposes of the 

Act remains the applicable standard 

until EPA approves a change, deletion, 

or addition to that water quality 

standard, or until EPA promulgates a 

more stringent water quality standard. 

(f) How can I find out what the applicable standards are for purposes of the 

Act? In each Regional office, EPA 

maintains a docket system for the 

States and authorized Tribes in that 

Region, available to the public, identifying the applicable water quality 

standards for purposes of the Act. 

[48 FR 51405, Nov. 8, 1983, as amended at 60 

FR 15387, Mar. 23, 1995; 65 FR 24653, Apr. 27, 

2000] 

§ 131.22 EPA promulgation of water 

quality standards. 

(a) If the State does not adopt the 

changes specified by the Regional Administrator within 90 days after notification of the Regional Administrator’s 

disapproval, the Administrator shall 

promptly propose and promulgate such 

standard. 

(b) The Administrator may also propose and promulgate a regulation, applicable to one or more States, setting 

forth a new or revised standard upon 

determining such a standard is necessary to meet the requirements of the 

Act. 

(c) In promulgating water quality 

standards, the Administrator is subject 

to the same policies, procedures, analyses, and public participation requirements established for States in these 

regulations. 

Subpart D—Federally Promulgated 

Water Quality Standards 

§ 131.31 Arizona. 

(a) [Reserved] 

(b) The following waters have, in addition to the uses designated by the 

State, the designated use of fish consumption as defined in R18–11–101 

(which is available from the Arizona 

Department of Environmental Quality, 

Water Quality Division, 3033 North 

Central Ave., Phoenix, AZ 85012): 

COLORADO MAIN STEM RIVER 

BASIN: 

Hualapai Wash 

MIDDLE GILA RIVER BASIN: 

Agua Fria River (Camelback Road to 

Avondale WWTP) 

Galena Gulch 

Gila River (Felix Road to the Salt 

River) 

Queen Creek (Headwaters to the Superior WWTP) 

Queen Creek (Below Potts Canyon) 

SAN PEDRO RIVER BASIN: 

Copper Creek 

SANTA CRUZ RIVER BASIN: 

Agua Caliente Wash 

Nogales Wash 

Sonoita Creek (Above the town of 

Patagonia) 

Tanque Verde Creek 

Tinaja Wash 

Davidson Canyon 

UPPER GILA RIVER BASIN 

Chase Creek 

(c) To implement the requirements of 

R18–11–108.A.5 with respect to effects of 

mercury on wildlife, EPA (or the State 

with the approval of EPA) shall implement a monitoring program to assess 

attainment of the water quality standard. 

(Sec. 303, Federal Water Pollution Control 

Act, as amended, 33 U.S.C. 1313, 86 Stat. 816 

et seq., Pub. L. 92–500; Clean Water Act, Pub. 

L. 92–500, as amended; 33 U.S.C. 1251 et seq.) 

[41 FR 25000, June 22, 1976; 41 FR 48737, Nov. 

5, 1976. Redesignated and amended at 42 FR 

56740, Oct. 28, 1977. Further redesignated and 

amended at 48 FR 51408, Nov. 8, 1983; 61 FR 

20693, May 7, 1996; 68 FR 62744, Nov. 6, 2003] 

§ 131.32 Pennsylvania. 

(a) Antidegradation policy. This 

antidegradation policy shall be applicable to all waters of the United States 

within the Commonwealth of Pennsylvania, including wetlands. 

(1) Existing in-stream uses and the 

level of water quality necessary to protect the existing uses shall be maintained and protected. 

(2) Where the quality of the waters 

exceeds levels necessary to support 

propagation of fish, shellfish, and wildlife and recreation in and on the water, 

that quality shall be maintained and 

protected unless the Commonwealth 

finds, after full satisfaction of the 

inter-governmental coordination and 

public participation provisions of the 

Commonwealth’s continuing planning 

process, that allowing lower water 


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§ 131.33 40 CFR Ch. I (7–1–08 Edition) 

quality is necessary to accommodate 

important economic or social development in the area in which the waters 

are located. In allowing such degradation or lower water quality, the Commonwealth shall assure water quality 

adequate to protect existing uses fully. 

Further, the Commonwealth shall assure that there shall be achieved the 

highest statutory and regulatory requirements for all new and existing 

point sources and all cost-effective and 

reasonable best management practices 

for nonpoint sources. 

(3) Where high quality waters are 

identified as constituting an outstanding National resource, such as 

waters of National and State parks and 

wildlife refuges and water of exceptional recreational and ecological significance, that water quality shall be 

maintained and protected. 

(b) [Reserved] 

[61 FR 64822, Dec. 9, 1996] 

§ 131.33 Idaho. 

(a) Temperature criteria for bull trout. 

(1) Except for those streams or portions 

of streams located in Indian country, 

or as may be modified by the Regional 

Administrator, EPA Region X, pursuant to paragraph (a)(3) of this section, 

a temperature criterion of 10 °C, expressed as an average of daily maximum temperatures over a seven-day 

period, applies to the waterbodies identified in paragraph (a)(2) of this section 

during the months of June, July, August and September. 

(2) The following waters are protected for bull trout spawning and 

rearing: 

(i) BOISE-MORE BASIN: Devils 

Creek, East Fork Sheep Creek, Sheep 

Creek. 

(ii) BROWNLEE RESERVOIR BASIN: 

Crooked River, Indian Creek. 

(iii) CLEARWATER BASIN: Big Canyon Creek, Cougar Creek, Feather 

Creek, Laguna Creek, Lolo Creek, 

Orofino Creek, Talapus Creek, West 

Fork Potlatch River. 

(iv) COEUR D’ALENE LAKE BASIN: 

Cougar Creek, Fernan Creek, Kid 

Creek, Mica Creek, South Fork Mica 

Creek, Squaw Creek, Turner Creek. 

(v) HELLS CANYON BASIN: Dry 

Creek, East Fork Sheep Creek, Getta 

Creek, Granite Creek, Kurry Creek, 

Little Granite Creek, Sheep Creek. 

(vi) LEMHI BASIN: Adams Creek, 

Alder Creek, Basin Creek, Bear Valley 

Creek, Big Eightmile Creek, Big 

Springs Creek, Big Timber Creek, Bray 

Creek, Bull Creek, Cabin Creek, Canyon Creek, Carol Creek, Chamberlain 

Creek, Clear Creek, Climb Creek, Cooper Creek, Dairy Creek, Deer Creek, 

Deer Park Creek, East Fork Hayden 

Creek, Eighteenmile Creek, Falls 

Creek, Ferry Creek, Ford Creek, 

Geertson Creek, Grove Creek, Hawley 

Creek, Hayden Creek, Kadletz Creek, 

Kenney Creek, Kirtley Creek, Lake 

Creek, Lee Creek, Lemhi River (above 

Big Eightmile Creek), Little Eightmile 

Creek, Little Mill Creek, Little Timber 

Creek, Middle Fork Little Timber 

Creek, Milk Creek, Mill Creek, Mogg 

Creek, North Fork Kirtley Creek, 

North Fork Little Timber Creek, Paradise Creek, Patterson Creek, Payne 

Creek, Poison Creek, Prospect Creek, 

Rocky Creek, Short Creek, Squaw 

Creek, Squirrel Creek, Tobias Creek, 

Trail Creek, West Fork Hayden Creek, 

Wright Creek. 

(vii) LITTLE LOST BASIN: Badger 

Creek, Barney Creek, Bear Canyon, 

Bear Creek, Bell Mountain Creek, Big 

Creek, Bird Canyon, Black Creek, Buck 

Canyon, Bull Creek, Cedar Run Creek, 

Chicken Creek, Coal Creek, Corral 

Creek, Deep Creek, Dry Creek, Dry 

Creek Canal, Firbox Creek, Garfield 

Creek, Hawley Canyon, Hawley Creek, 

Horse Creek, Horse Lake Creek, Iron 

Creek, Jackson Creek, Little Lost 

River (above Badger Creek), Mahogany 

Creek, Main Fork Sawmill Creek, Massacre Creek, Meadow Creek, Mill 

Creek, Moffett Creek, Moonshine 

Creek, Quigley Creek, Red Rock Creek, 

Sands Creek, Sawmill Creek, Slide 

Creek, Smithie Fork, Squaw Creek, 

Summerhouse Canyon, Summit Creek, 

Timber Creek, Warm Creek, Wet Creek, 

Williams Creek. 

(viii) LITTLE SALMON BASIN: 

Bascum Canyon, Boulder Creek, Brown 

Creek, Campbell Ditch, Castle Creek, 

Copper Creek, Granite Fork Lake Fork 

Rapid River, Hard Creek, Hazard 

Creek, Lake Fork Rapid River, Little 

Salmon River (above Hazard Creek), 

Paradise Creek, Pony Creek, Rapid 


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Environmental Protection Agency § 131.33 

River, Squirrel Creek, Trail Creek, 

West Fork Rapid River. 

(ix) LOCHSA BASIN: Apgar Creek, 

Badger Creek, Bald Mountain Creek, 

Beaver Creek, Big Flat Creek, Big Stew 

Creek, Boulder Creek, Brushy Fork, 

Cabin Creek, Castle Creek, Chain 

Creek, Cliff Creek, Coolwater Creek, 

Cooperation Creek, Crab Creek, Crooked Fork Lochsa River, Dan Creek, 

Deadman Creek, Doe Creek, Dutch 

Creek, Eagle Creek, East Fork Papoose 

Creek, East Fork Split Creek, East 

Fork Squaw Creek, Eel Creek, Fern 

Creek, Fire Creek, Fish Creek, Fish 

Lake Creek, Fox Creek, Gass Creek, 

Gold Creek, Ham Creek, Handy Creek, 

Hard Creek, Haskell Creek, Heather 

Creek, Hellgate Creek, Holly Creek, 

Hopeful Creek, Hungery Creek, Indian 

Grave Creek, Jay Creek, Kerr Creek, 

Kube Creek, Lochsa River, Lone Knob 

Creek, Lottie Creek, Macaroni Creek, 

Maud Creek, Middle Fork Clearwater 

River, No-see-um Creek, North Fork 

Spruce Creek, North Fork Storm 

Creek, Nut Creek, Otter Slide Creek, 

Pack Creek, Papoose Creek, Parachute 

Creek, Pass Creek, Pedro Creek, Pell 

Creek, Pete King Creek, Placer Creek, 

Polar Creek, Postoffice Creek, Queen 

Creek, Robin Creek, Rock Creek, Rye 

Patch Creek, Sardine Creek, Shoot 

Creek, Shotgun Creek, Skookum 

Creek, Snowshoe Creek, South Fork 

Spruce Creek, South Fork Storm 

Creek, Split Creek, Sponge Creek, 

Spring Creek, Spruce Creek, Squaw 

Creek, Storm Creek, Tick Creek, Tomcat Creek, Tumble Creek, Twin Creek, 

Wag Creek, Walde Creek, Walton 

Creek, Warm Springs Creek, Weir 

Creek, Wendover Creek, West Fork 

Boulder Creek, West Fork Papoose 

Creek, West Fork Squaw Creek, West 

Fork Wendover Creek, White Sands 

Creek, Willow Creek. 

(x) LOWER CLARK FORK BASIN: 

Cascade Creek, East Fork, East Fork 

Creek, East Forkast Fork Creek, Gold 

Creek, Johnson Creek, Lightning 

Creek, Mosquito Creek, Porcupine 

Creek, Rattle Creek, Spring Creek, 

Twin Creek, Wellington Creek. 

(xi) LOWER KOOTENAI BASIN: Ball 

Creek, Boundary Creek, Brush Creek, 

Cabin Creek, Caribou Creek, Cascade 

Creek, Cooks Creek, Cow Creek, Curley 

Creek, Deep Creek, Grass Creek, Jim 

Creek, Lime Creek, Long Canyon 

Creek, Mack Creek, Mission Creek, 

Myrtle Creek, Peak Creek, Snow 

Creek, Trout Creek. 

(xii) LOWER MIDDLE FORK SALMON BASIN: Acorn Creek, Alpine Creek, 

Anvil Creek, Arrastra Creek, Bar 

Creek, Beagle Creek, Beaver Creek, 

Belvidere Creek, Big Creek, Birdseye 

Creek, Boulder Creek, Brush Creek, 

Buck Creek, Bull Creek, Cabin Creek, 

Camas Creek, Canyon Creek, Castle 

Creek, Clark Creek, Coin Creek, Corner 

Creek, Coxey Creek, Crooked Creek, 

Doe Creek, Duck Creek, East Fork 

Holy Terror Creek, Fawn Creek, Flume 

Creek, Fly Creek, Forge Creek, Furnace Creek, Garden Creek, Government 

Creek, Grouse Creek, Hammer Creek, 

Hand Creek, Holy Terror Creek, J Fell 

Creek, Jacobs Ladder Creek, Lewis 

Creek, Liberty Creek, Lick Creek, 

Lime Creek, Little Jacket Creek, Little Marble Creek, Little White Goat 

Creek, Little Woodtick Creek, Logan 

Creek, Lookout Creek, Loon Creek, 

Martindale Creek, Meadow Creek, Middle Fork Smith Creek, Monumental 

Creek, Moore Creek, Mulligan Creek, 

North Fork Smith Creek, Norton 

Creek, Placer Creek, Pole Creek, Rams 

Creek, Range Creek, Routson Creek, 

Rush Creek, Sawlog Creek, Sheep 

Creek, Sheldon Creek, Shellrock Creek, 

Ship Island Creek, Shovel Creek, Silver 

Creek, Smith Creek, Snowslide Creek, 

Soldier Creek, South Fork Camas 

Creek, South Fork Chamberlain Creek, 

South Fork Holy Terror Creek, South 

Fork Norton Creek, South Fork Rush 

Creek, South Fork Sheep Creek, Spider 

Creek, Spletts Creek, Telephone Creek, 

Trail Creek, Two Point Creek, West 

Fork Beaver Creek, West Fork Camas 

Creek, West Fork Monumental Creek, 

West Fork Rush Creek, White Goat 

Creek, Wilson Creek. 

(xiii) LOWER NORTH FORK CLEARWATER BASIN: Adair Creek, Badger 

Creek, Bathtub Creek, Beaver Creek, 

Black Creek, Brush Creek, Buck Creek, 

Butte Creek, Canyon Creek, Caribou 

Creek, Crimper Creek, Dip Creek, Dog 

Creek, Elmer Creek, Falls Creek, Fern 

Creek, Goat Creek, Isabella Creek, 

John Creek, Jug Creek, Jungle Creek, 

Lightning Creek, Little Lost Lake 

Creek, Little North Fork Clearwater 

River, Lost Lake Creek, Lund Creek, 


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§ 131.33 40 CFR Ch. I (7–1–08 Edition) 

Montana Creek, Mowitch Creek, Papoose Creek, Pitchfork Creek, Rocky 

Run, Rutledge Creek, Spotted Louis 

Creek, Triple Creek, Twin Creek, West 

Fork Montana Creek, Willow Creek. 

(xiv) LOWER SALMON BASIN: Bear 

Gulch, Berg Creek, East Fork John 

Day Creek, Elkhorn Creek, Fiddle 

Creek, French Creek, Hurley Creek, 

John Day Creek, Kelly Creek, Klip 

Creek, Lake Creek, Little Slate Creek, 

Little Van Buren Creek, No Business 

Creek, North Creek, North Fork Slate 

Creek, North Fork White Bird Creek, 

Partridge Creek, Slate Creek, Slide 

Creek, South Fork John Day Creek, 

South Fork White Bird Creek, Warm 

Springs Creek. 

(xv) LOWER SELWAY BASIN: Anderson Creek, Bailey Creek, Browns 

Spring Creek, Buck Lake Creek, Butte 

Creek, Butter Creek, Cabin Creek, 

Cedar Creek, Chain Creek, Chute 

Creek, Dent Creek, Disgrace Creek, 

Double Creek, East Fork Meadow 

Creek, East Fork Moose Creek, Elbow 

Creek, Fivemile Creek, Fourmile 

Creek, Gate Creek, Gedney Creek, Goddard Creek, Horse Creek, Indian Hill 

Creek, Little Boulder Creek, Little 

Schwar Creek, Matteson Creek, Meadow Creek, Monument Creek, Moose 

Creek, Moss Creek, Newsome Creek, 

North Fork Moose Creek, Rhoda Creek, 

Saddle Creek, Schwar Creek, Shake 

Creek, Spook Creek, Spur Creek, Tamarack Creek, West Fork Anderson 

Creek, West Fork Gedney Creek, West 

Moose Creek, Wounded Doe Creek. 

(xvi) MIDDLE FORK CLEARWATER 

BASIN: Baldy Creek, Big Cedar Creek, 

Browns Spring Creek, Clear Creek, 

Middle Fork Clear Creek, Pine Knob 

Creek, South Fork Clear Creek. 

(xvii) MIDDLE FORK PAYETTE 

BASIN: Bull Creek, Middle Fork 

Payette River (above Fool Creek), Oxtail Creek, Silver Creek, Sixteen-toone Creek. 

(xviii) MIDDLE SALMON-CHAMBERLAIN BASIN: Arrow Creek, 

Bargamin Creek, Bat Creek, Bay 

Creek, Bear Creek, Bend Creek, Big 

Elkhorn Creek, Big Harrington Creek, 

Big Mallard Creek, Big Squaw Creek, 

Bleak Creek, Bronco Creek, Broomtail 

Creek, Brown Creek, Cayuse Creek, 

Center Creek, Chamberlain Creek, Cliff 

Creek, Colt Creek, Corn Creek, Crooked Creek, Deer Creek, Dennis Creek, 

Disappointment Creek, Dismal Creek, 

Dog Creek, East Fork Fall Creek, East 

Fork Horse Creek, East Fork Noble 

Creek, Fall Creek, Filly Creek, Fish 

Creek, Flossie Creek, Game Creek, Gap 

Creek, Ginger Creek, Green Creek, 

Grouse Creek, Guard Creek, Hamilton 

Creek, Horse Creek, Hot Springs Creek, 

Hotzel Creek, Hungry Creek, Iodine 

Creek, Jack Creek, Jersey Creek, 

Kitchen Creek, Lake Creek, Little 

Horse Creek, Little Lodgepole Creek, 

Little Mallard Creek, Lodgepole Creek, 

Mayflower Creek, McCalla Creek, 

Meadow Creek, Moose Creek, Moose 

Jaw Creek, Mule Creek, Mustang 

Creek, No Name Creek, Owl Creek, 

Poet Creek, Pole Creek, Porcupine 

Creek, Prospector Creek, Pup Creek, 

Queen Creek, Rainey Creek, Ranch 

Creek, Rattlesnake Creek, Red Top 

Creek, Reynolds Creek, Rim Creek, 

Ring Creek, Rock Creek, Root Creek, 

Runaway Creek, Sabe Creek, Saddle 

Creek, Salt Creek, Schissler Creek, 

Sheep Creek, Short Creek, Shovel 

Creek, Skull Creek, Slaughter Creek, 

Slide Creek, South Fork Cottonwood 

Creek, South Fork Chamberlain Creek, 

South Fork Kitchen Creek, South Fork 

Salmon River, Spread Creek, Spring 

Creek, Starvation Creek, Steamboat 

Creek, Steep Creek, Stud Creek, Warren Creek, Webfoot Creek, West Fork 

Chamberlain Creek, West Fork Rattlesnake Creek, West Horse Creek, 

Whimstick Creek, Wind River, Woods 

Fork Horse Creek. 

(xix) MIDDLE SALMON-PANTHER 

BASIN: Allen Creek, Arnett Creek, 

Beaver Creek, Big Deer Creek, Blackbird Creek, Boulder Creek, Cabin 

Creek, Camp Creek, Carmen Creek, 

Clear Creek, Colson Creek, Copper 

Creek, Corral Creek, Cougar Creek, 

Cow Creek, Deadhorse Creek, Deep 

Creek, East Boulder Creek, Elkhorn 

Creek, Fawn Creek, Fourth Of July 

Creek, Freeman Creek, Homet Creek, 

Hughes Creek, Hull Creek, Indian 

Creek, Iron Creek, Jackass Creek, Jefferson Creek, Jesse Creek, Lake Creek, 

Little Deep Creek, Little Hat Creek, 

Little Sheep Creek, McConn Creek, 

McKim Creek, Mink Creek, Moccasin 

Creek, Moose Creek, Moyer Creek, 

Musgrove Creek, Napias Creek, North 

Fork Hughes Creek, North Fork Iron 


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Environmental Protection Agency § 131.33 

Creek, North Fork Salmon River, 

North Fork Williams Creek, Opal 

Creek, Otter Creek, Owl Creek, Panther Creek, Park Creek, Phelan Creek, 

Pine Creek, Pony Creek, Porphyry 

Creek, Pruvan Creek, Rabbit Creek, 

Rancherio Creek, Rapps Creek, Salt 

Creek, Salzer Creek, Saw Pit Creek, 

Sharkey Creek, Sheep Creek, South 

Fork Cabin Creek, South Fork Iron 

Creek, South Fork Moyer Creek, South 

Fork Phelan Creek, South Fork Sheep 

Creek, South Fork Williams Creek, 

Spring Creek, Squaw Creek, Trail 

Creek, Twelvemile Creek, Twin Creek, 

Weasel Creek, West Fork Blackbird 

Creek, West Fork Iron Creek, Williams 

Creek, Woodtick Creek. 

(xx) MOYIE BASIN: Brass Creek, 

Bussard Creek, Copper Creek, Deer 

Creek, Faro Creek, Keno Creek, Kreist 

Creek, Line Creek, McDougal Creek, 

Mill Creek, Moyie River (above Skin 

Creek), Placer Creek, Rutledge Creek, 

Skin Creek, Spruce Creek, West Branch 

Deer Creek. 

(xxi) NORTH AND MIDDLE FORK 

BOISE BASIN: Abby Creek, Arrastra 

Creek, Bald Mountain Creek, 

Ballentyne Creek, Banner Creek, 

Bayhouse Creek, Bear Creek, Bear 

River, Big Gulch, Big Silver Creek, 

Billy Creek, Blackwarrior Creek, Bow 

Creek, Browns Creek, Buck Creek, 

Cabin Creek, Cahhah Creek, Camp 

Gulch, China Fork, Coma Creek, 

Corbus Creek, Cow Creek, Crooked 

River, Cub Creek, Decker Creek, Dutch 

Creek, Dutch Frank Creek, East Fork 

Roaring River, East Fork Swanholm 

Creek, East Fork Yuba River, Flint 

Creek, Flytrip Creek, Gotch Creek, 

Graham Creek, Granite Creek, Grays 

Creek, Greylock Creek, Grouse Creek, 

Hot Creek, Hungarian Creek, Joe Daley 

Creek, Johnson Creek, Kid Creek, King 

Creek, La Mayne Creek, Leggit Creek, 

Lightening Creek, Little Queens River, 

Little Silver Creek, Louise Creek, 

Lynx Creek, Mattingly Creek, McKay 

Creek, McLeod Creek, McPhearson 

Creek, Middle Fork Boise River (above 

Roaring River), Middle Fork Corbus 

Creek, Middle Fork Roaring River, Mill 

Creek, Misfire Creek, Montezuma 

Creek, North Fork Boise River (above 

Bear River), Phifer Creek, Pikes Fork, 

Quartz Gulch, Queens River, Rabbit 

Creek, Right Creek, Roaring River, 

Robin Creek, Rock Creek, Rockey 

Creek, Sawmill Creek, Scenic Creek, 

Scotch Creek, Scott Creek, Shorip 

Creek, Smith Creek, Snow Creek, 

Snowslide Creek, South Fork Corbus 

Creek, South Fork Cub Creek, Spout 

Creek, Steamboat Creek, Steel Creek, 

Steppe Creek, Swanholm Creek, Timpa 

Creek, Trail Creek, Trapper Creek, Tripod Creek, West Fork Creek, West Warrior Creek, Willow Creek, Yuba River. 

(xxii) NORTH FORK PAYETTE 

BASIN: Gold Fork River, North Fork 

Gold Fork River, Pearsol Creek. 

(xxiii) AHSIMEROI BASIN: Baby 

Creek, Bear Creek, Big Creek, Big 

Gulch, Burnt Creek, Christian Gulch, 

Dead Cat Canyon, Ditch Creek, Donkey 

Creek, Doublespring Creek, Dry Canyon, Dry Gulch, East Fork Burnt 

Creek, East Fork Morgan Creek, East 

Fork Pahsimeroi River, East Fork Patterson Creek, Elkhorn Creek, Falls 

Creek, Goldberg Creek, Hillside Creek, 

Inyo Creek, Long Creek, Mahogany 

Creek, Mill Creek, Morgan Creek, 

Morse Creek, Mulkey Gulch, North 

Fork Big Creek, North Fork Morgan 

Creek, Pahsimeroi River (above Big 

Creek), Patterson Creek, Rock Spring 

Canyon, Short Creek, Snowslide Creek, 

South Fork Big Creek, Spring Gulch, 

Squaw Creek, Stinking Creek, Tater 

Creek, West Fork Burnt Creek, West 

Fork North Fork Big Creek. 

(xxiv) PAYETTE BASIN: Squaw 

Creek, Third Fork Squaw Creek. 

(xxv) PEND OREILLE LAKE BASIN: 

Branch North Gold Creek, Cheer Creek, 

Chloride Gulch, Dry Gulch, Dyree 

Creek, Flume Creek, Gold Creek, Granite Creek, Grouse Creek, Kick Bush 

Gulch, North Fork Grouse Creek, 

North Gold Creek, Plank Creek, Rapid 

Lightning Creek, South Fork Grouse 

Creek, Strong Creek, Thor Creek, Trestle Creek, West Branch Pack River, 

West Gold Creek, Wylie Creek, Zuni 

Creek. 

(xxvi) PRIEST BASIN: Abandon 

Creek, Athol Creek, Bath Creek, Bear 

Creek, Bench Creek, Blacktail Creek, 

Bog Creek, Boulder Creek, Bugle 

Creek, Canyon Creek, Caribou Creek, 

Cedar Creek, Chicopee Creek, Deadman 

Creek, East Fork Trapper Creek, East 

River, Fedar Creek, Floss Creek, Gold 

Creek, Granite Creek, Horton Creek, 

Hughes Fork, Indian Creek, Jackson 


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§ 131.33 40 CFR Ch. I (7–1–08 Edition) 

Creek, Jost Creek, Kalispell Creek, 

Kent Creek, Keokee Creek, Lime 

Creek, Lion Creek, Lost Creek, Lucky 

Creek, Malcom Creek, Middle Fork 

East River, Muskegon Creek, North 

Fork Granite Creek, North Fork Indian 

Creek, Packer Creek, Rock Creek, 

Ruby Creek, South Fork Granite 

Creek, South Fork Indian Creek, South 

Fork Lion Creek, Squaw Creek, Tango 

Creek, Tarlac Creek, The Thorofare, 

Trapper Creek, Two Mouth Creek, 

Uleda Creek, Priest R. (above Priest 

Lake), Zero Creek. 

(xxvii) SOUTH FORK BOISE BASIN: 

Badger Creek, Bear Creek, Bear Gulch, 

Big Smoky Creek, Big Water Gulch, 

Boardman Creek, Burnt Log Creek, 

Cayuse Creek, Corral Creek, Cow 

Creek, Edna Creek, Elk Creek, Emma 

Creek, Feather River, Fern Gulch, 

Grape Creek, Gunsight Creek, Haypress 

Creek, Heather Creek, Helen Creek, 

Johnson Creek, Lincoln Creek, Little 

Cayuse Creek, Little Rattlesnake 

Creek, Little Skeleton Creek, Little 

Smoky Creek, Loggy Creek, Mule 

Creek, North Fork Ross Fork, Pinto 

Creek, Rattlesnake Creek, Ross Fork, 

Russel Gulch, Salt Creek, Shake Creek, 

Skeleton Creek, Slater Creek, Smokey 

Dome Canyon, South Fork Ross Fork, 

Three Forks Creek, Tipton Creek, Vienna Creek, Weeks Gulch, West Fork 

Big Smoky Creek, West Fork Salt 

Creek, West Fork Skeleton Creek, Willow Creek. 

(xxviii) SOUTH FORK CLEARWATER BASIN: American River, 

Baker Gulch, Baldy Creek, Bear Creek, 

Beaver Creek, Big Canyon Creek, Big 

Elk Creek, Blanco Creek, Boundary 

Creek, Box Sing Creek, Boyer Creek, 

Cartwright Creek, Cole Creek, Crooked 

River, Dawson Creek, Deer Creek, 

Ditch Creek, East Fork American 

River, East Fork Crooked River, Elk 

Creek, Fivemile Creek, Flint Creek, 

Fourmile Creek, Fox Creek, French 

Gulch, Galena Creek, Gospel Creek, 

Hagen Creek, Hays Creek, Johns Creek, 

Jungle Creek, Kirks Fork American 

River, Little Elk Creek, Little Moose 

Creek, Little Siegel Creek, Loon Creek, 

Mackey Creek, Meadow Creek, Melton 

Creek, Middle Fork Red River, Mill 

Creek, Monroe Creek, Moores Creek, 

Moores Lake Creek, Moose Butte 

Creek, Morgan Creek, Mule Creek, 

Newsome Creek, Nuggett Creek, 

Otterson Creek, Pat Brennan Creek, 

Pilot Creek, Quartz Creek, Queen 

Creek, Rabbit Creek, Rainbow Gulch, 

Red River, Relief Creek, Ryan Creek, 

Sally Ann Creek, Sawmill Creek, 

Schooner Creek, Schwartz Creek, 

Sharmon Creek, Siegel Creek, Silver 

Creek, Sixmile Creek, Sixtysix Creek, 

Snoose Creek, Sourdough Creek, South 

Fork Red River, Square Mountain 

Creek, Swale Creek, Swift Creek, Taylor Creek, Tenmile Creek, Trail Creek, 

Trapper Creek, Trout Creek, 

Twentymile Creek, Twin Lakes Creek, 

Umatilla Creek, West Fork Big Elk 

Creek, West Fork Crooked River, West 

Fork Gospel Creek, West Fork 

Newsome Creek, West Fork Red River, 

West Fork Twentymile Creek, Whiskey 

Creek, Whitaker Creek, Williams 

Creek. 

(xxix) SOUTH FORK PAYETTE 

BASIN: Archie Creek, Ash Creek, 

Baron Creek, Basin Creek, Bear Creek, 

Beaver Creek, Big Spruce Creek, Bitter 

Creek, Blacks Creek, Blue Jay Creek, 

Burn Creek, Bush Creek, Camp Creek, 

Canyon Creek, Casner Creek, Cat 

Creek, Chapman Creek, Charters 

Creek, Clear Creek, Coski Creek, Cup 

Creek, Dead Man Creek, Deadwood 

River, Deer Creek, East Fork Deadwood Creek, East Fork Warm Springs 

Creek, Eby Creek, Elkhorn Creek, 

Emma Creek, Fall Creek, Fence Creek, 

Fern Creek, Fivemile Creek, Fox 

Creek, Garney Creek, Gates Creek, 

Goat Creek, Grandjem Creek, Grouse 

Creek, Habit Creek, Helende Creek, 

Horse Creek, Huckleberry Creek, Jackson Creek, Kettle Creek, Kirkham 

Creek, Lake Creek, Lick Creek, Little 

Tenmile Creek, Logging Gulch, Long 

Creek, MacDonald Creek, Meadow 

Creek, Middle Fork Warm Springs 

Creek, Miller Creek, Monument Creek, 

Moulding Creek, Ninemile Creek, No 

Man Creek, No Name Creek, North 

Fork Baron Creek, North Fork Canyon 

Creek, North Fork Deer Creek, North 

Fork Whitehawk Creek, O’Keefe Creek, 

Packsaddle Creek, Park Creek, Pass 

Creek, Pinchot Creek, Pine Creek, 

Pitchfork Creek, Pole Creek, Richards 

Creek, Road Fork Rock Creek, Rock 

Creek, Rough Creek, Scott Creek, Silver Creek, Sixmile Creek, Smith Creek, 

Smokey Creek, South Fork Beaver 


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Environmental Protection Agency § 131.33 

Creek, South Fork Canyon Creek, 

South Fork Clear Creek, South Fork 

Payette River (above Rock Creek), 

South Fork Scott Creek, South Fork 

Warm Spring Creek, Spring Creek, 

Steep Creek, Stratton Creek, Topnotch 

Creek, Trail Creek, Wapiti Creek, 

Warm Spring Creek, Warm Springs 

Creek, Whangdoodle Creek, Whitehawk 

Creek, Wild Buck Creek, Wills Gulch, 

Wilson Creek, Wolf Creek. 

(xxx) SOUTH FORK SALMON 

BASIN: Alez Creek, Back Creek, Bear 

Creek, Bishop Creek, Blackmare Creek, 

Blue Lake Creek, Buck Creek, 

Buckhorn Bar Creek, Buckhorn Creek, 

Burgdorf Creek, Burntlog Creek, Cabin 

Creek, Calf Creek, Camp Creek, Cane 

Creek, Caton Creek, Cinnabar Creek, 

Cliff Creek, Cly Creek, Cougar Creek, 

Cow Creek, Cox Creek, Curtis Creek, 

Deep Creek, Dollar Creek, Dutch 

Creek, East Fork South Fork Salmon 

River, East Fork Zena Creek, Elk 

Creek, Enos Creek, Falls Creek, Fernan 

Creek, Fiddle Creek, Fitsum Creek, 

Flat Creek, Fourmile Creek, Goat 

Creek, Grimmet Creek, Grouse Creek, 

Halfway Creek, Hanson Creek, Hays 

Creek, Holdover Creek, Hum Creek, Indian Creek, Jeanette Creek, Johnson 

Creek, Josephine Creek, Jungle Creek, 

Knee Creek, Krassel Creek, Lake 

Creek, Landmark Creek, Lick Creek, 

Little Buckhorn Creek, Little Indian 

Creek, Lodgepole Creek, Loon Creek, 

Maverick Creek, Meadow Creek, Middle 

Fork Elk Creek, Missouri Creek, Moose 

Creek, Mormon Creek, Nasty Creek, 

Nethker Creek, Nick Creek, No Mans 

Creek, North Fork Bear Creek, North 

Fork Buckhorn Creek, North Fork 

Camp Creek, North Fork Dollar Creek, 

North Fork Fitsum Creek, North Fork 

Lake Fork, North Fork Lick Creek, 

North Fork Riordan Creek, North Fork 

Six-bit Creek, Oompaul Creek, Paradise Creek, Park Creek, Peanut Creek, 

Pepper Creek, Phoebe Creek, Piah 

Creek, Pid Creek, Pilot Creek, Pony 

Creek, Porcupine Creek, Porphyry 

Creek, Prince Creek, Profile Creek, 

Quartz Creek, Reeves Creek, Rice 

Creek, Riordan Creek, Roaring Creek, 

Ruby Creek, Rustican Creek, Ryan 

Creek, Salt Creek, Sand Creek, Secesh 

River, Sheep Creek, Silver Creek, Sister Creek, Six-Bit Creek, South Fork 

Bear Creek, South Fork Blackmare 

Creek, South Fork Buckhorn Creek, 

South Fork Cougar Creek, South Fork 

Elk Creek, South Fork Fitsum Creek, 

South Fork Fourmile Creek, South 

Fork Salmon River, South Fork 

Threemile Creek, Split Creek, Steep 

Creek, Sugar Creek, Summit Creek, 

Tamarack Creek, Teepee Creek, 

Threemile Creek, Trail Creek, Trapper 

Creek, Trout Creek, Tsum Creek, Twobit Creek, Tyndall Creek, Vein Creek, 

Victor Creek, Wardenhoff Creek, Warm 

Lake Creek, Warm Spring Creek, West 

Fork Buckhorn Creek, West Fork Elk 

Creek, West Fork Enos Creek, West 

Fork Zena Creek, Whangdoodle Creek, 

Willow Basket Creek, Willow Creek, 

Zena Creek. 

(xxxi) ST. JOE R. BASIN: Bad Bear 

Creek, Bean Creek, Bear Creek, Beaver 

Creek, Bedrock Creek, Berge Creek, 

Bird Creek, Blue Grouse Creek, Boulder 

Creek, Broadaxe Creek, Bruin Creek, 

California Creek, Cherry Creek, Clear 

Creek, Color Creek, Copper Creek, 

Dolly Creek, Dump Creek, Eagle Creek, 

East Fork Bluff Creek, East Fork Gold 

Creek, Emerald Creek, Fishhook 

Creek, Float Creek, Fly Creek, Fuzzy 

Creek, Gold Creek, Heller Creek, Indian Creek, Kelley Creek, Malin Creek, 

Marble Creek, Medicine Creek, Mica 

Creek, Mill Creek, Mosquito Creek, 

North Fork Bean Creek, North Fork 

Saint Joe River, North Fork Simmons 

Creek, Nugget Creek, Packsaddle 

Creek, Periwinkle Creek, Prospector 

Creek, Quartz Creek, Red Cross Creek, 

Red Ives Creek, Ruby Creek, Saint Joe 

River (above Siwash Creek), Setzer 

Creek, Sherlock Creek, Simmons 

Creek, Siwash Creek, Skookum Creek, 

Thomas Creek, Thorn Creek, Three 

Lakes Creek, Timber Creek, Tinear 

Creek, Trout Creek, Tumbledown 

Creek, Wahoo Creek, Washout Creek, 

Wilson Creek, Yankee Bar Creek. 

(xxxii) UPPER COEUR D’ALENE 

BASIN: Brown Creek, Falls Creek, 

Graham Creek. 

(xxxiii) UPPER KOOTENAI BASIN: 

Halverson Cr, North Callahan Creek, 

South Callahan Creek, West Fork 

Keeler Creek 

(xxxiv) UPPER MIDDLE FORK 

SALMON BASIN: Asher Creek, Automatic Creek, Ayers Creek, Baldwin 

Creek, Banner Creek, Bear Creek, Bear 

Valley Creek, Bearskin Creek, Beaver 


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§ 131.33 40 CFR Ch. I (7–1–08 Edition) 

Creek, Bernard Creek, Big Chief Creek, 

Big Cottonwood Creek, Birch Creek, 

Blue Lake Creek, Blue Moon Creek, 

Boundary Creek, Bridge Creek, Browning Creek, Buck Creek, Burn Creek, 

Cabin Creek, Cache Creek, Camp 

Creek, Canyon Creek, Cap Creek, Cape 

Horn Creek, Casner Creek, Castle Fork, 

Casto Creek, Cat Creek, Chokebore 

Creek, Chuck Creek, Cliff Creek, Cold 

Creek, Collie Creek, Colt Creek, Cook 

Creek, Corley Creek, Cornish Creek, 

Cottonwood Creek, Cougar Creek, Crystal Creek, Cub Creek, Cultus Creek, 

Dagger Creek, Deer Creek, Deer Horn 

Creek, Doe Creek, Dry Creek, Duffield 

Creek, Dynamite Creek, Eagle Creek, 

East Fork Elk Creek, East Fork Indian 

Creek, East Fork Mayfield Creek, Elk 

Creek, Elkhorn Creek, Endoah Creek, 

Fall Creek, Fawn Creek, Feltham 

Creek, Fir Creek, Flat Creek, Float 

Creek, Foresight Creek, Forty-five 

Creek, Forty-four Creek, Fox Creek, 

Full Moon Creek, Fuse Creek, Grays 

Creek, Grenade Creek, Grouse Creek, 

Gun Creek, Half Moon Creek, Hogback 

Creek, Honeymoon Creek, Hot Creek, 

Ibex Creek, Indian Creek, Jose Creek, 

Kelly Creek, Kerr Creek, Knapp Creek, 

Kwiskwis Creek, Lime Creek, Lincoln 

Creek, Little Beaver Creek, Little Cottonwood Creek, Little East Fork Elk 

Creek, Little Indian Creek, Little Loon 

Creek, Little Pistol Creek, Lola Creek, 

Loon Creek, Lucinda Creek, Lucky 

Creek, Luger Creek, Mace Creek, Mack 

Creek, Marble Creek, Marlin Creek, 

Marsh Creek, Mayfield Creek, 

McHoney Creek, McKee Creek, Merino 

Creek, Middle Fork Elkhorn Creek, 

Middle Fork Indian Creek, Middle Fork 

Salmon River (above Soldier Creek), 

Mine Creek, Mink Creek, Moonshine 

Creek, Mowitch Creek, Muskeg Creek, 

Mystery Creek, Nelson Creek, New 

Creek, No Name Creek, North Fork Elk 

Creek, North Fork Elkhorn Creek, 

North Fork Sheep Creek, North Fork 

Sulphur Creek, Papoose Creek, Parker 

Creek, Patrol Creek, Phillips Creek, 

Pierson Creek, Pinyon Creek, Pioneer 

Creek, Pistol Creek, Placer Creek, 

Poker Creek, Pole Creek, Popgun 

Creek, Porter Creek, Prospect Creek, 

Rabbit Creek, Rams Horn Creek, Range 

Creek, Rapid River, Rat Creek, Remington Creek, Rock Creek, Rush Creek, 

Sack Creek, Safety Creek, Salt Creek, 

Savage Creek, Scratch Creek, Seafoam 

Creek, Shady Creek, Shake Creek, 

Sheep Creek, Sheep Trail Creek, Shell 

Creek, Shrapnel Creek, Siah Creek, Silver Creek, Slide Creek, Snowshoe 

Creek, Soldier Creek, South Fork Cottonwood Creek, South Fork Sheep 

Creek, Spike Creek, Springfield Creek, 

Squaw Creek, Sulphur Creek, Sunnyside Creek, Swamp Creek, Tennessee 

Creek, Thatcher Creek, Thicket Creek, 

Thirty-two Creek, Tomahawk Creek, 

Trail Creek, Trapper Creek, Trigger 

Creek, Twenty-two Creek, Vader 

Creek, Vanity Creek, Velvet Creek, 

Walker Creek, Wampum Creek, Warm 

Spring Creek, West Fork Elk Creek, 

West Fork Little Loon Creek, West 

Fork Mayfield Creek, White Creek, 

Wickiup Creek, Winchester Creek, 

Winnemucca Creek, Wyoming Creek. 

(xxxv) UPPER NORTH FORK 

CLEARWATER BASIN: Adams Creek, 

Avalanche Creek, Bacon Creek, Ball 

Creek, Barn Creek, Barnard Creek, 

Barren Creek, Bear Creek, Beaver Dam 

Creek, Bedrock Creek, Bill Creek, Bostonian Creek, Boundary Creek, Burn 

Creek, Butter Creek, Camp George 

Creek, Canyon Creek, Cayuse Creek, 

Chamberlain Creek, Clayton Creek, 

Cliff Creek, Coffee Creek, Cold Springs 

Creek, Collins Creek, Colt Creek, Cool 

Creek, Copper Creek, Corral Creek, 

Cougar Creek, Craig Creek, Crater 

Creek, Cub Creek, Davis Creek, Deadwood Creek, Deer Creek, Dill Creek, 

Drift Creek, Elizabeth Creek, Fall 

Creek, Fire Creek, Fix Creek, Flame 

Creek, Fly Creek, Fourth of July 

Creek, Fro Creek, Frog Creek, Frost 

Creek, Gilfillian Creek, Goose Creek, 

Grass Creek, Gravey Creek, Grizzly 

Creek, Hanson Creek, Heather Creek, 

Henry Creek, Hidden Creek, Howard 

Creek, Independence Creek, Jam Creek, 

Japanese Creek, Johnagan Creek, 

Johnny Creek, Junction Creek, Kelly 

Creek, Kid Lake Creek, Kodiak Creek, 

Lake Creek, Laundry Creek, Lightning 

Creek, Little Moose Creek, Little 

Weitas Creek, Liz Creek, Long Creek, 

Marten Creek, Meadow Creek, Middle 

Creek, Middle North Fork Kelly Creek, 

Mill Creek, Mire Creek, Monroe Creek, 

Moose Creek, Negro Creek, Nettle 

Creek, Niagra Gulch, North Fork 

Clearwater River (Fourth of July 

Creek), Nub Creek, Osier Creek, Perry 


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Creek, Pete Ott Creek, Placer Creek, 

Polar Creek, Post Creek, Potato Creek, 

Quartz Creek, Rapid Creek, Rawhide 

Creek, Roaring Creek, Rock Creek, 

Rocky Ridge Creek, Ruby Creek, Saddle Creek, Salix Creek, Scurry Creek, 

Seat Creek, Short Creek, Shot Creek, 

Siam Creek, Silver Creek, Skull Creek, 

Slide Creek, Smith Creek, Snow Creek, 

South Fork Kelly Creek, Spud Creek, 

Spy Creek, Stolen Creek, Stove Creek, 

Sugar Creek, Swamp Creek, Tinear 

Creek, Tinkle Creek, Toboggan Creek, 

Trail Creek, Vanderbilt Gulch, Wall 

Creek, Weitas Creek, Williams Creek, 

Windy Creek, Wolf Creek, Young 

Creek. 

(xxxvi) UPPER SALMON BASIN: 

Alder Creek, Alpine Creek, Alta Creek, 

Alturas Lake Creek, Anderson Creek, 

Aspen Creek, Basin Creek, Bayhorse 

Creek, Bear Creek, Beaver Creek, Big 

Boulder Creek, Block Creek, Blowfly 

Creek, Blue Creek, Boundary Creek, 

Bowery Creek, Broken Ridge Creek, 

Bruno Creek, Buckskin Creek, Cabin 

Creek, Camp Creek, Cash Creek, 

Challis Creek, Chamberlain Creek, 

Champion Creek, Cherry Creek, Cinnabar Creek, Cleveland Creek, Coal 

Creek, Crooked Creek, Darling Creek, 

Deadwood Creek, Decker Creek, Deer 

Creek, Dry Creek, Duffy Creek, East 

Basin Creek, East Fork Salmon River, 

East Fork Valley Creek, East Pass 

Creek, Eddy Creek, Eightmile Creek, 

Elevenmile Creek, Elk Creek, Ellis 

Creek, Estes Creek, First Creek, Fisher 

Creek, Fishhook Creek, Fivemile 

Creek, Fourth of July Creek, Frenchman Creek, Garden Creek, Germania 

Creek, Goat Creek, Gold Creek, Gooseberry Creek, Greylock Creek, Hay 

Creek, Hell Roaring Creek, Herd Creek, 

Huckleberry Creek, Iron Creek, Job 

Creek, Jordan Creek, Juliette Creek, 

Kelly Creek, Kinnikinic Creek, Lick 

Creek, Lightning Creek, Little Basin 

Creek, Little Beaver Creek, Little 

Boulder Creek, Little West Fork Morgan Creek, Lodgepole Creek, Lone Pine 

Creek, Lost Creek, MacRae Creek, 

Martin Creek, McKay Creek, Meadow 

Creek, Mill Creek, Morgan Creek, 

Muley Creek, Ninemile Creek, Noho 

Creek, Pack Creek, Park Creek, Pat 

Hughes Creek, Pig Creek, Pole Creek, 

Pork Creek, Prospect Creek, Rainbow 

Creek, Redfish Lake Creek, Road 

Creek, Rough Creek, Sage Creek, Sagebrush Creek, Salmon River (Redfish 

Lake Creek), Sawmill Creek, Second 

Creek, Sevenmile Creek, Sheep Creek, 

Short Creek, Sixmile Creek, Slate 

Creek, Smiley Creek, South Fork East 

Fork Salmon River, Squaw Creek, 

Stanley Creek, Stephens Creek, Summit Creek, Sunday Creek, Swimm 

Creek, Taylor Creek, Tenmile Creek, 

Tennel Creek, Thompson Creek, Three 

Cabins Creek, Trail Creek, Trap Creek, 

Trealor Creek, Twelvemile Creek, Twin 

Creek, Valley Creek, Van Horn Creek, 

Vat Creek, Warm Spring Creek, Warm 

Springs Creek, Washington Creek, West 

Beaver Creek, West Fork Creek, West 

Fork East Fork Salmon River, West 

Fork Herd Creek, West Fork Morgan 

Creek, West Fork Yankee Fork, West 

Pass Creek, Wickiup Creek, Williams 

Creek, Willow Creek, Yankee Fork. 

(xxxvii) UPPER SELWAY BASIN: 

Basin Creek, Bear Creek, Burn Creek, 

Camp Creek, Canyon Creek, Cliff 

Creek, Comb Creek, Cooper Creek, Cub 

Creek, Deep Creek, Eagle Creek, Elk 

Creek, Fall Creek, Fox Creek, Goat 

Creek, Gold Pan Creek, Granite Creek, 

Grass Gulch, Haystack Creek, Hells 

Half Acre Creek, Indian Creek, Kim 

Creek, Lake Creek, Langdon Gulch, 

Little Clearwater River, Lodge Creek, 

Lunch Creek, Mist Creek, Paloma 

Creek, Paradise Creek, Peach Creek, 

Pettibone Creek, Running Creek, Saddle Gulch, Schofield Creek, Selway 

River (above Pettibone Creek), South 

Fork Running Creek, South Fork Saddle Gulch, South Fork Surprise Creek, 

Spruce Creek, Squaw Creek, Stripe 

Creek, Surprise Creek, Set Creek, 

Tepee Creek, Thirteen Creek, Three 

Lakes Creek, Triple Creek, Wahoo 

Creek, White Cap Creek, Wilkerson 

Creek, Witter Creek. 

(xxxviii) WEISER BASIN: Anderson 

Creek, Bull Corral Creek, Dewey Creek, 

East Fork Weiser River, Little Weiser 

River, above Anderson Creek, Sheep 

Creek, Wolf Creek. 

(3) Procedures for site specific modification of listed waterbodies or temperature criteria for bull trout. 

(i) The Regional Administrator may, 

in his discretion, determine that the 

temperature criteria in paragraph 

(a)(1) of this section shall not apply to 

a specific waterbody or portion thereof 


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§ 131.33 40 CFR Ch. I (7–1–08 Edition) 

listed in paragraph (a)(2) of this section. Any such determination shall be 

made consistent with § 131.11 and shall 

be based on a finding that bull trout 

spawning and rearing is not an existing 

use in such waterbody or portion thereof. 

(ii) The Regional Administrator may, 

in his discretion, raise the temperature 

criteria in paragraph (a)(1) of this section as they pertain to a specific 

waterbody or portion thereof listed in 

paragraph (a)(2) of this section. Any 

such determination shall be made consistent with § 131.11, and shall be based 

on a finding that bull trout would be 

fully supported at the higher temperature criteria. 

(iii) For any determination made 

under paragraphs (a)(3)(i) or (a)(3)(ii) of 

this section, the Regional Administrator shall, prior to making such a determination, provide for public notice 

of and comment on a proposed determination. For any such proposed determination, the Regional Administrator 

shall prepare and make available to 

the public a technical support document addressing each waterbody or 

portion thereof that would be deleted 

or modified and the justification for 

each proposed determination. This document shall be made available to the 

public not later than the date of public 

notice. 

(iv) The Regional Administrator 

shall maintain and make available to 

the public an updated list of determinations made pursuant to paragraphs (a)(3)(i) and (a)(3)(ii) of this section as well as the technical support 

documents for each determination. 

(v) Nothing in this paragraph (a)(3) 

shall limit the Administrator’s authority to modify the temperature criteria 

in paragraph (a)(1) of this section or 

the list of waterbodies in paragraph 

(a)(2) of this section through rulemaking. 

(b) Use designations for surface waters. 

In addition to the State adopted use 

designations, the following water body 

segments in Idaho are designated for 

cold water biota: Canyon Creek (PB 

121)—below mining impact; South Fork 

Coeur d’Alene River (PB 140S)—Daisy 

Gulch to mouth; Blackfoot River (USB 

360)—Equalizing Dam to mouth, except 

for any portion in Indian country; Soda 

Creek (BB 310)—source to mouth. 

(c) Excluded waters. Lakes, ponds, 

pools, streams, and springs outside 

public lands but located wholly and entirely upon a person’s land are not protected specifically or generally for any 

beneficial use, unless such waters are 

designated in Idaho 16.01.02.110. 

through 160., or, although not so designated, are waters of the United 

States as defined at 40 CFR 122.2. 

(d) Water quality standard variances. 

(1) The Regional Administrator, EPA 

Region X, is authorized to grant 

variances from the water quality 

standards in paragraph (b) of this section where the requirements of this 

paragraph (d) are met. A water quality 

standard variance applies only to the 

permittee requesting the variance and 

only to the pollutant or pollutants 

specified in the variance; the underlying water quality standard otherwise 

remains in effect. 

(2) A water quality standard variance 

shall not be granted if: 

(i) Standards will be attained by implementing effluent limitations required under sections 301(b) and 306 of 

the CWA and by the permittee implementing reasonable best management 

practices for nonpoint source control; 

or 

(ii) The variance would likely jeopardize the continued existence of any 

threatened or endangered species listed 

under section 4 of the Endangered Species Act or result in the destruction or 

adverse modification of such species’

critical habitat. 

(3) Subject to paragraph (d)(2) of this 

section, a water quality standards variance may be granted if the applicant 

demonstrates to EPA that attaining 

the water quality standard is not feasible because: 

(i) Naturally occurring pollutant concentrations prevent the attainment of 

the use; or 

(ii) Natural, ephemeral, intermittent 

or low flow conditions or water levels 

prevent the attainment of the use, unless these conditions may be compensated for by the discharge of sufficient volume of effluent discharges 

without violating State water conservation requirements to enable uses 

to be met; or 


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Environmental Protection Agency § 131.34 

(iii) Human caused conditions or 

sources of pollution prevent the attainment of the use and cannot be remedied or would cause more environmental damage to correct than to leave 

in place; or 

(iv) Dams, diversions or other types 

of hydrologic modifications preclude 

the attainment of the use, and it is not 

feasible to restore the waterbody to its 

original condition or to operate such 

modification in a way which would result in the attainment of the use; or 

(v) Physical conditions related to the 

natural features of the waterbody, such 

as the lack of a proper substrate, cover, 

flow, depth, pools, riffles, and the like 

unrelated to water quality, preclude 

attainment of aquatic life protection 

uses; or 

(vi) Controls more stringent than 

those required by sections 301(b) and 

306 of the CWA would result in substantial and widespread economic and social impact. 

(4) Procedures. An applicant for a 

water quality standards variance shall 

submit a request to the Regional Administrator not later than the date the 

applicant applies for an NPDES permit 

which would implement the variance, 

except that an application may be filed 

later if the need for the variance arises 

or the data supporting the variance becomes available after the NPDES permit application is filed. The application shall include all relevant information showing that the requirements for 

a variance have been satisfied. The burden is on the applicant to demonstrate 

to EPA’s satisfaction that the designated use is unattainable for one of 

the reasons specified in paragraph 

(d)(3) of this section. If the Regional 

Administrator preliminarily determines that grounds exist for granting a 

variance, he shall publish notice of the 

proposed variance. Notice of a final decision to grant a variance shall also be 

published. EPA will incorporate into 

the permittee’s NPDES permit all conditions needed to implement the variance. 

(5) A variance may not exceed 5 years 

or the term of the NPDES permit, 

whichever is less. A variance may be 

renewed if the applicant reapplies and 

demonstrates that the use in question 

is still not attainable. Renewal of the 

variance may be denied if the applicant 

did not comply with the conditions of 

the original variance. 

[62 FR 41183, July 31, 1997, as amended at 67 

FR 11248, Mar. 13, 2002] 

§ 131.34 Kansas. 

(a) In addition to the State-adopted 

use designations, the following water 

body segment in Kansas is designated 

for an expected aquatic life use: 

Stream segment name HUC8 Segment # Designated use 

Basin: Missouri 

Subbasin: Independence-Sugar 

Whiskey Creek ............................................................... 10240011 235 Expected Aquatic Life. 

(b) In addition to the State-adopted 

use designations, the following water 

body segments and lakes in Kansas are 

designated for recreation uses as specified in the following table: 

Stream segment name HUC8 Segment # Designated use 

Basin: Cimarron 

Subbasin: Upper Cimarron-Bluff 

Big Sandy Creek ............................................................ 11040008 6 Primary Contact Recreation 

Gyp Creek ...................................................................... 11040008 25 Secondary Contact Recreation 

Indian Creek ................................................................... 11040008 14 Secondary Contact Recreation 

Kiger Creek .................................................................... 11040008 8 Secondary Contact Recreation 

Stink Creek ..................................................................... 11040008 17 Secondary Contact Recreation 

Two Mile Creek .............................................................. 11040008 15 Secondary Contact Recreation 


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§ 131.34 40 CFR Ch. I (7–1–08 Edition) 

Stream segment name HUC8 Segment # Designated use 

Subbasin: Lower Cimarron-Eagle Chief 

Anderson Creek ............................................................. 11050001 39 Primary Contact Recreation 

Basin: Kansas/Lower Republican 

Subbasin: Middle Republican 

Antelope Creek .............................................................. 10250016 66 Secondary Contact Recreation 

Ash Creek ...................................................................... 10250016 65 Secondary Contact Recreation 

Bean Creek .................................................................... 10250016 76 Secondary Contact Recreation 

Cora Creek ..................................................................... 10250016 51 Secondary Contact Recreation 

Crow Creek (Crystal Creek) ........................................... 10250016 52 Secondary Contact Recreation 

Korb Creek ..................................................................... 10250016 72 Primary Contact Recreation 

Long Branch ................................................................... 10250016 68 Secondary Contact Recreation 

Lost Creek ...................................................................... 10250016 53 Primary Contact Recreation 

Louisa Creek .................................................................. 10250016 61 Secondary Contact Recreation 

Norway Creek ................................................................ 10250016 73 Secondary Contact Recreation 

Oak Creek ...................................................................... 10250016 75 Secondary Contact Recreation 

Rebecca Creek .............................................................. 10250016 39 Secondary Contact Recreation 

Spring Creek .................................................................. 10250016 71 Secondary Contact Recreation 

Spring Creek .................................................................. 10250016 78 Secondary Contact Recreation 

Taylor Creek ................................................................... 10250016 74 Secondary Contact Recreation 

Walnut Creek ................................................................. 10250016 40 Primary Contact Recreation 

Walnut Creek ................................................................. 10250016 46 Secondary Contact Recreation 

White Rock Creek, North Branch .................................. 10250016 60 Secondary Contact Recreation 

Wolf Creek ..................................................................... 10250016 67 Secondary Contact Recreation 

Subbasin: Lower Republican 

Cool Creek ..................................................................... 10250017 50 Secondary Contact Recreation 

Elm Creek, West Branch ............................................... 10250017 59 Secondary Contact Recreation 

Gar Creek ....................................................................... 10250017 12 Primary Contact Recreation 

Mud Creek ...................................................................... 10250017 63 Secondary Contact Recreation 

Turkey Creek .................................................................. 10250017 51 Secondary Contact Recreation 

Subbasin: Upper Kansas 

Dry Creek ....................................................................... 10270101 19 Primary Contact Recreation 

Humbolt Creek ............................................................... 10270101 10 Primary Contact Recreation 

Kitten Creek ................................................................... 10270101 14 Primary Contact Recreation 

Little Arkansas Creek ..................................................... 10270101 13 Primary Contact Recreation 

Little Kitten Creek ........................................................... 10270101 16 Primary Contact Recreation 

Mulberry Creek ............................................................... 10270101 20 Secondary Contact Recreation 

Subbasin: Middle Kansas 

Adams Creek ................................................................. 10270102 53 Secondary Contact Recreation 

Bartlett Creek ................................................................. 10270102 55 Secondary Contact Recreation 

Big Elm Creek ................................................................ 10270102 90 Secondary Contact Recreation 

Blackjack Creek ............................................................. 10270102 64 Secondary Contact Recreation 

Blacksmith Creek ........................................................... 10270102 102 Secondary Contact Recreation 

Bourbonais Creek .......................................................... 10270102 63 Primary Contact Recreation 

Brush Creek ................................................................... 10270102 57 Primary Contact Recreation 

Coal Creek ..................................................................... 10270102 46 Secondary Contact Recreation 

Coryell Creek ................................................................. 10270102 94 Secondary Contact Recreation 

Cow Creek ..................................................................... 10270102 45 Secondary Contact Recreation 

Crow Creek .................................................................... 10270102 86 Primary Contact Recreation 

Darnells Creek ............................................................... 10270102 51 Secondary Contact Recreation 

Dog Creek ...................................................................... 10270102 78 Secondary Contact Recreation 

Doyle Creek ................................................................... 10270102 69 Primary Contact Recreation 

Dry Creek ....................................................................... 10270102 79 Primary Contact Recreation 

Dutch Creek ................................................................... 10270102 92 Secondary Contact Recreation 

Elm Creek ...................................................................... 10270102 98 Primary Contact Recreation 

Elm Creek ...................................................................... 10270102 103 Secondary Contact Recreation 

Elm Slough ..................................................................... 10270102 58 Secondary Contact Recreation 

Emmons Creek .............................................................. 10270102 66 Secondary Contact Recreation 

French Creek ................................................................. 10270102 19 Primary Contact Recreation 

Gilson Creek .................................................................. 10270102 47 Secondary Contact Recreation 

Hendricks Creek ............................................................. 10270102 73 Primary Contact Recreation 

Hise Creek ..................................................................... 10270102 43 Secondary Contact Recreation 

Indian Creek ................................................................... 10270102 20 Secondary Contact Recreation 

James Creek .................................................................. 10270102 87 Secondary Contact Recreation 

Jim Creek ....................................................................... 10270102 52 Secondary Contact Recreation 

Johnson Creek ............................................................... 10270102 84 Secondary Contact Recreation 


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Environmental Protection Agency § 131.34 

Stream segment name HUC8 Segment # Designated use 

Kuenzli Creek ................................................................. 10270102 82 Secondary Contact Recreation 

Little Cross Creek .......................................................... 10270102 61 Secondary Contact Recreation 

Little Muddy Creek ......................................................... 10270102 99 Primary Contact Recreation 

Loire Creek ..................................................................... 10270102 80 Primary Contact Recreation 

Lost Creek ...................................................................... 10270102 60 Secondary Contact Recreation 

Messhoss Creek ............................................................ 10270102 96 Primary Contact Recreation 

Mud Creek ...................................................................... 10270102 44 Secondary Contact Recreation 

Mud Creek ...................................................................... 10270102 56 Secondary Contact Recreation 

Muddy Creek, West Fork ............................................... 10270102 93 Secondary Contact Recreation 

Mulberry Creek ............................................................... 10270102 42 Secondary Contact Recreation 

Mulberry Creek ............................................................... 10270102 77 Secondary Contact Recreation 

Nehring Creek ................................................................ 10270102 81 Primary Contact Recreation 

Paw Paw Creek ............................................................. 10270102 75 Secondary Contact Recreation 

Pleasant Hill Run Creek ................................................. 10270102 23 Primary Contact Recreation 

Pomeroy Creek .............................................................. 10270102 59 Secondary Contact Recreation 

Post Creek ..................................................................... 10270102 101 Secondary Contact Recreation 

Pretty Creek ................................................................... 10270102 74 Secondary Contact Recreation 

Rock Creek .................................................................... 10270102 21 Primary Contact Recreation 

Rock Creek, East Fork ................................................... 10270102 22 Secondary Contact Recreation 

Ross Creek .................................................................... 10270102 35 Secondary Contact Recreation 

Salt Creek ...................................................................... 10270102 88 Secondary Contact Recreation 

Sand Creek .................................................................... 10270102 65 Secondary Contact Recreation 

Shunganunga Creek, South Branch .............................. 10270102 106 Primary Contact Recreation 

Snake Creek .................................................................. 10270102 95 Secondary Contact Recreation 

Snokomo Creek ............................................................. 10270102 85 Secondary Contact Recreation 

Spring Creek .................................................................. 10270102 48 Secondary Contact Recreation 

Spring Creek .................................................................. 10270102 54 Primary Contact Recreation 

Spring Creek .................................................................. 10270102 76 Secondary Contact Recreation 

Spring Creek .................................................................. 10270102 105 Secondary Contact Recreation 

Sullivan Creek ................................................................ 10270102 89 Primary Contact Recreation 

Tecumseh Creek ............................................................ 10270102 107 Secondary Contact Recreation 

Turkey Creek .................................................................. 10270102 71 Primary Contact Recreation 

Unnamed Stream ........................................................... 10270102 8 Secondary Contact Recreation 

Vassar Creek ................................................................. 10270102 100 Secondary Contact Recreation 

Vermillion Creek ............................................................. 10270102 15 Primary Contact Recreation 

Walnut Creek ................................................................. 10270102 91 Secondary Contact Recreation 

Wells Creek .................................................................... 10270102 68 Secondary Contact Recreation 

Whetstone Creek ........................................................... 10270102 104 Secondary Contact Recreation 

Wilson Creek .................................................................. 10270102 50 Primary Contact Recreation 

Wolf Creek ..................................................................... 10270102 49 Primary Contact Recreation 

Subbasin: Delaware 

Banner Creek ................................................................. 10270103 45 Secondary Contact Recreation 

Barnes Creek ................................................................. 10270103 39 Secondary Contact Recreation 

Bills Creek ...................................................................... 10270103 47 Secondary Contact Recreation 

Brush Creek ................................................................... 10270103 44 Secondary Contact Recreation 

Brush Creek ................................................................... 10270103 54 Primary Contact Recreation 

Burr Oak Branch ............................................................ 10270103 8 Primary Contact Recreation 

Catamount Creek ........................................................... 10270103 49 Primary Contact Recreation 

Cedar Creek, North ........................................................ 10270103 46 Primary Contact Recreation 

Claywell Creek ............................................................... 10270103 56 Primary Contact Recreation 

Clear Creek .................................................................... 10270103 19 Primary Contact Recreation 

Coal Creek ..................................................................... 10270103 50 Primary Contact Recreation 

Grasshopper Creek ........................................................ 10270103 18 Primary Contact Recreation 

Grasshopper Creek ........................................................ 10270103 20 Primary Contact Recreation 

Gregg Creek ................................................................... 10270103 24 Primary Contact Recreation 

Honey Creek .................................................................. 10270103 55 Secondary Contact Recreation 

Little Grasshopper Creek ............................................... 10270103 16 Secondary Contact Recreation 

Little Wild Horse Creek .................................................. 10270103 57 Primary Contact Recreation 

Mission Creek ................................................................ 10270103 40 Primary Contact Recreation 

Nebo Creek .................................................................... 10270103 48 Secondary Contact Recreation 

Negro Creek ................................................................... 10270103 43 Secondary Contact Recreation 

Otter Creek ..................................................................... 10270103 41 Secondary Contact Recreation 

Plum Creek .................................................................... 10270103 36 Secondary Contact Recreation 

Rock Creek .................................................................... 10270103 34 Primary Contact Recreation 

Rock Creek .................................................................... 10270103 53 Primary Contact Recreation 

Spring Creek .................................................................. 10270103 42 Primary Contact Recreation 

Squaw Creek .................................................................. 10270103 38 Secondary Contact Recreation 

Straight Creek ................................................................ 10270103 28 Secondary Contact Recreation 

Tick Creek ...................................................................... 10270103 52 Primary Contact Recreation 

Unnamed Stream ........................................................... 10270103 31 Secondary Contact Recreation 

Walnut Creek ................................................................. 10270103 51 Primary Contact Recreation 

Wolfley Creek ................................................................. 10270103 27 Secondary Contact Recreation 


rmajette on PRODPC74 with CFR
424 

§ 131.34 40 CFR Ch. I (7–1–08 Edition) 

Stream segment name HUC8 Segment # Designated use 

Subbasin: Lower Kansas 

Baldwin Creek ................................................................ 10270104 69 Secondary Contact Recreation 

Brush Creek ................................................................... 10270104 49 Secondary Contact Recreation 

Brush Creek, West ......................................................... 10270104 46 Secondary Contact Recreation 

Buttermilk Creek ............................................................. 10270104 44 Secondary Contact Recreation 

Camp Creek ................................................................... 10270104 41 Secondary Contact Recreation 

Camp Creek ................................................................... 10270104 74 Secondary Contact Recreation 

Captain Creek ................................................................ 10270104 72 Primary Contact Recreation 

Chicken Creek ................................................................ 10270104 79 Secondary Contact Recreation 

Clear Creek .................................................................... 10270104 383 Primary Contact Recreation 

Cow Creek ..................................................................... 10270104 58 Secondary Contact Recreation 

Crooked Creek ............................................................... 10270104 10 Primary Contact Recreation 

Crooked Creek ............................................................... 10270104 12 Primary Contact Recreation 

Dawson Creek ................................................................ 10270104 45 Secondary Contact Recreation 

Elk Creek ........................................................................ 10270104 68 Primary Contact Recreation 

Full Creek ....................................................................... 10270104 52 Primary Contact Recreation 

Hanson Creek ................................................................ 10270104 437 Secondary Contact Recreation 

Hog Creek ...................................................................... 10270104 54 Secondary Contact Recreation 

Howard Creek ................................................................ 10270104 43 Secondary Contact Recreation 

Hulls Branch ................................................................... 10270104 42 Secondary Contact Recreation 

Indian Creek ................................................................... 10270104 48 Secondary Contact Recreation 

Jarbalo Creek ................................................................. 10270104 51 Secondary Contact Recreation 

Kent Creek ..................................................................... 10270104 73 Secondary Contact Recreation 

Kill Creek ........................................................................ 10270104 37 Primary Contact Recreation 

Little Cedar Creek .......................................................... 10270104 76 Primary Contact Recreation 

Little Mill Creek .............................................................. 10270104 78 Primary Contact Recreation 

Little Turkey Creek ......................................................... 10270104 62 Primary Contact Recreation 

Little Wakarusa Creek .................................................... 10270104 71 Primary Contact Recreation 

Mission Creek, East ....................................................... 10270104 61 Secondary Contact Recreation 

Ninemile Creek ............................................................... 10270104 15 Secondary Contact Recreation 

Ninemile Creek ............................................................... 10270104 17 Primary Contact Recreation 

Oakley Creek ................................................................. 10270104 56 Secondary Contact Recreation 

Plum Creek .................................................................... 10270104 50 Secondary Contact Recreation 

Prairie Creek .................................................................. 10270104 47 Secondary Contact Recreation 

Rock Creek .................................................................... 10270104 35 Primary Contact Recreation 

Scatter Creek ................................................................. 10270104 13 Secondary Contact Recreation 

Spoon Creek .................................................................. 10270104 75 Secondary Contact Recreation 

Stone Horse Creek ........................................................ 10270104 57 Secondary Contact Recreation 

Stranger Creek ............................................................... 10270104 7 Primary Contact Recreation 

Stranger Creek ............................................................... 10270104 8 Primary Contact Recreation 

Stranger Creek ............................................................... 10270104 9 Primary Contact Recreation 

Tonganoxie Creek .......................................................... 10270104 14 Primary Contact Recreation 

Tooley Creek .................................................................. 10270104 379 Secondary Contact Recreation 

Turkey Creek .................................................................. 10270104 77 Primary Contact Recreation 

Unnamed Stream ........................................................... 10270104 11 Primary Contact Recreation 

Unnamed Stream ........................................................... 10270104 16 Secondary Contact Recreation 

Wakarusa River, Middle Branch .................................... 10270104 64 Secondary Contact Recreation 

Wakarusa River, South Branch ..................................... 10270104 63 Primary Contact Recreation 

Washington Creek .......................................................... 10270104 36 Primary Contact Recreation 

Yankee Tank Creek ....................................................... 10270104 70 Primary Contact Recreation 

Subbasin: Lower Big Blue 

Ackerman Creek ............................................................ 10270205 49 Secondary Contact Recreation 

Black Vermillion River, Clear Fork ................................. 10270205 9 Primary Contact Recreation 

Black Vermillion River, North Fork ................................. 10270205 15 Secondary Contact Recreation 

Black Vermillion River, South Fork ................................ 10270205 12 Secondary Contact Recreation 

Bluff Creek ..................................................................... 10270205 573 Primary Contact Recreation 

Bommer Creek ............................................................... 10270205 40 Secondary Contact Recreation 

Busksnort Creek ............................................................. 10270205 566 Secondary Contact Recreation 

Carter Creek ................................................................... 10270205 59 Secondary Contact Recreation 

Cedar Creek ................................................................... 10270205 56 Secondary Contact Recreation 

Corndodger Creek .......................................................... 10270205 52 Primary Contact Recreation 

De Shazer Creek ........................................................... 10270205 55 Secondary Contact Recreation 

Deadman Creek ............................................................. 10270205 60 Secondary Contact Recreation 

Deer Creek ..................................................................... 10270205 36 Secondary Contact Recreation 

Dog Walk Creek ............................................................. 10270205 53 Secondary Contact Recreation 

Dutch Creek ................................................................... 10270205 44 Primary Contact Recreation 

Elm Creek ...................................................................... 10270205 46 Secondary Contact Recreation 

Elm Creek, North ........................................................... 10270205 41 Secondary Contact Recreation 

Fancy Creek, North Fork ............................................... 10270205 61 Secondary Contact Recreation 

Fancy Creek, West ........................................................ 10270205 29 Primary Contact Recreation 

Game Fork ..................................................................... 10270205 54 Secondary Contact Recreation 


rmajette on PRODPC74 with CFR
425 

Environmental Protection Agency § 131.34 

Stream segment name HUC8 Segment # Designated use 

Hop Creek ...................................................................... 10270205 43 Secondary Contact Recreation 

Indian Creek ................................................................... 10270205 37 Secondary Contact Recreation 

Jim Creek ....................................................................... 10270205 57 Secondary Contact Recreation 

Johnson Fork ................................................................. 10270205 51 Secondary Contact Recreation 

Kearney Branch ............................................................. 10270205 58 Secondary Contact Recreation 

Lily Creek ....................................................................... 10270205 39 Secondary Contact Recreation 

Little Indian Creek .......................................................... 10270205 35 Secondary Contact Recreation 

Little Timber Creek ......................................................... 10270205 48 Primary Contact Recreation 

Meadow Creek ............................................................... 10270205 34 Secondary Contact Recreation 

Mission Creek ................................................................ 10270205 22 Primary Contact Recreation 

Murdock Creek ............................................................... 10270205 42 Secondary Contact Recreation 

Otter Creek ..................................................................... 10270205 67 Secondary Contact Recreation 

Otter Creek, North .......................................................... 10270205 62 Primary Contact Recreation 

Perkins Creek ................................................................. 10270205 47 Secondary Contact Recreation 

Phiel Creek ..................................................................... 10270205 68 Primary Contact Recreation 

Raemer Creek ................................................................ 10270205 33 Primary Contact Recreation 

Robidoux Creek ............................................................. 10270205 16 Primary Contact Recreation 

Schell Creek ................................................................... 10270205 45 Primary Contact Recreation 

School Branch ................................................................ 10270205 63 Secondary Contact Recreation 

Scotch Creek .................................................................. 10270205 38 Secondary Contact Recreation 

Spring Creek .................................................................. 10270205 19 Primary Contact Recreation 

Spring Creek .................................................................. 10270205 65 Primary Contact Recreation 

Timber Creek ................................................................. 10270205 64 Primary Contact Recreation 

Weyer Creek .................................................................. 10270205 50 Secondary Contact Recreation 

Subbasin: Upper Little Blue 

Dry Creek ....................................................................... 10270206 41 Secondary Contact Recreation 

Subbasin: Lower Little Blue 

Ash Creek ...................................................................... 10270207 36 Secondary Contact Recreation 

Beaver Creek ................................................................. 10270207 38 Secondary Contact Recreation 

Bolling Creek .................................................................. 10270207 42 Secondary Contact Recreation 

Bowman Creek ............................................................... 10270207 21 Secondary Contact Recreation 

Buffalo Creek ................................................................. 10270207 32 Secondary Contact Recreation 

Camp Creek ................................................................... 10270207 35 Secondary Contact Recreation 

Camp Creek ................................................................... 10270207 44 Primary Contact Recreation 

Cedar Creek ................................................................... 10270207 40 Secondary Contact Recreation 

Cherry Creek .................................................................. 10270207 25 Secondary Contact Recreation 

Coon Creek .................................................................... 10270207 23 Primary Contact Recreation 

Fawn Creek .................................................................... 10270207 45 Secondary Contact Recreation 

Gray Branch ................................................................... 10270207 27 Secondary Contact Recreation 

Humphrey Branch .......................................................... 10270207 24 Secondary Contact Recreation 

Iowa Creek ..................................................................... 10270207 34 Secondary Contact Recreation 

Jones Creek ................................................................... 10270207 29 Secondary Contact Recreation 

Joy Creek ....................................................................... 10270207 13 Secondary Contact Recreation 

Lane Branch ................................................................... 10270207 39 Secondary Contact Recreation 

Malone Creek ................................................................. 10270207 37 Secondary Contact Recreation 

Melvin Creek .................................................................. 10270207 33 Secondary Contact Recreation 

Mercer Creek ................................................................. 10270207 43 Primary Contact Recreation 

Mill Creek, South Fork ................................................... 10270207 31 Secondary Contact Recreation 

Myer Creek ..................................................................... 10270207 26 Secondary Contact Recreation 

Riddle Creek .................................................................. 10270207 17 Secondary Contact Recreation 

Rose Creek .................................................................... 10270207 12 Secondary Contact Recreation 

Salt Creek ...................................................................... 10270207 19 Primary Contact Recreation 

School Creek .................................................................. 10270207 49 Primary Contact Recreation 

Silver Creek .................................................................... 10270207 28 Primary Contact Recreation 

Spring Creek .................................................................. 10270207 15 Secondary Contact Recreation 

Spring Creek .................................................................. 10270207 30 Secondary Contact Recreation 

Walnut Creek ................................................................. 10270207 41 Primary Contact Recreation 

Basin: Lower Arkansas 

Subbasin: Rattlesnake 

Spring Creek .................................................................. 11030009 7 Secondary Contact Recreation 

Subbasin: Gar-Peace 

Gar Creek ....................................................................... 11030010 8 Primary Contact Recreation 

Subbasin: Cow 

Blood Creek ................................................................... 11030011 15 Secondary Contact Recreation 


rmajette on PRODPC74 with CFR
426 

§ 131.34 40 CFR Ch. I (7–1–08 Edition) 

Stream segment name HUC8 Segment # Designated use 

Deception Creek ............................................................ 11030011 13 Secondary Contact Recreation 

Dry Creek ....................................................................... 11030011 22 Primary Contact Recreation 

Jarvis Creek ................................................................... 11030011 19 Primary Contact Recreation 

Little Cheyenne Creek ................................................... 11030011 7 Primary Contact Recreation 

Little Cow Creek ............................................................. 11030011 2 Primary Contact Recreation 

Lost Creek ...................................................................... 11030011 17 Secondary Contact Recreation 

Owl Creek ...................................................................... 11030011 18 Primary Contact Recreation 

Plum Creek .................................................................... 11030011 4 Secondary Contact Recreation 

Salt Creek ...................................................................... 11030011 21 Primary Contact Recreation 

Spring Creek .................................................................. 11030011 20 Secondary Contact Recreation 

Subbasin: Little Arkansas 

Beaver Creek ................................................................. 11030012 26 Primary Contact Recreation 

Bull Creek ....................................................................... 11030012 24 Primary Contact Recreation 

Dry Creek ....................................................................... 11030012 22 Secondary Contact Recreation 

Dry Turkey Creek ........................................................... 11030012 13 Primary Contact Recreation 

Emma Creek .................................................................. 11030012 6 Primary Contact Recreation 

Emma Creek .................................................................. 11030012 7 Primary Contact Recreation 

Emma Creek, West ........................................................ 11030012 8 Primary Contact Recreation 

Gooseberry Creek .......................................................... 11030012 17 Primary Contact Recreation 

Horse Creek ................................................................... 11030012 19 Primary Contact Recreation 

Jester Creek ................................................................... 11030012 2 Primary Contact Recreation 

Jester Creek, East Fork ................................................. 11030012 18 Primary Contact Recreation 

Kisiwa Creek .................................................................. 11030012 15 Secondary Contact Recreation 

Lone Tree Creek ............................................................ 11030012 20 Secondary Contact Recreation 

Mud Creek ...................................................................... 11030012 16 Primary Contact Recreation 

Running Turkey Creek ................................................... 11030012 25 Secondary Contact Recreation 

Salt Creek ...................................................................... 11030012 21 Primary Contact Recreation 

Sun Creek ...................................................................... 11030012 11 Primary Contact Recreation 

Turkey Creek .................................................................. 11030012 12 Secondary Contact Recreation 

Subbasin: Middle Arkansas—Slate 

Antelope Creek .............................................................. 11030013 25 Primary Contact Recreation 

Badger Creek ................................................................. 11030013 31 Primary Contact Recreation 

Beaver Creek ................................................................. 11030013 29 Primary Contact Recreation 

Beaver Creek ................................................................. 11030013 33 Primary Contact Recreation 

Big Slough ...................................................................... 11030013 11 Primary Contact Recreation 

Big Slough, South Fork .................................................. 11030013 35 Primary Contact Recreation 

Bitter Creek .................................................................... 11030013 28 Primary Contact Recreation 

Dry Creek ....................................................................... 11030013 15 Primary Contact Recreation 

Dry Creek ....................................................................... 11030013 16 Primary Contact Recreation 

Gypsum Creek ............................................................... 11030013 5 Primary Contact Recreation 

Hargis Creek .................................................................. 11030013 24 Primary Contact Recreation 

Lost Creek ...................................................................... 11030013 23 Primary Contact Recreation 

Negro Creek ................................................................... 11030013 20 Primary Contact Recreation 

Oak Creek ...................................................................... 11030013 26 Secondary Contact Recreation 

Salt Creek ...................................................................... 11030013 22 Primary Contact Recreation 

Spring Creek .................................................................. 11030013 19 Primary Contact Recreation 

Spring Creek .................................................................. 11030013 21 Primary Contact Recreation 

Spring Creek .................................................................. 11030013 27 Primary Contact Recreation 

Spring Creek .................................................................. 11030013 34 Primary Contact Recreation 

Spring Creek .................................................................. 11030013 37 Primary Contact Recreation 

Winser Creek ................................................................. 11030013 32 Primary Contact Recreation 

Subbasin: North Fork Ninnescah 

Crow Creek .................................................................... 11030014 11 Primary Contact Recreation 

Dooleyville Creek ........................................................... 11030014 8 Primary Contact Recreation 

Goose Creek .................................................................. 11030014 10 Primary Contact Recreation 

Ninnescah River, North Fork ......................................... 11030014 1 Primary Contact Recreation 

Ninnescah River, North Fork ......................................... 11030014 5 Primary Contact Recreation 

Ninnescah River, North Fork ......................................... 11030014 6 Primary Contact Recreation 

Red Rock Creek ............................................................. 11030014 12 Primary Contact Recreation 

Rock Creek .................................................................... 11030014 13 Primary Contact Recreation 

Silver Creek .................................................................... 11030014 7 Primary Contact Recreation 

Spring Creek .................................................................. 11030014 14 Primary Contact Recreation 

Wolf Creek ..................................................................... 11030014 9 Primary Contact Recreation 

Subbasin: South Fork Ninnescah 

Coon Creek .................................................................... 11030015 9 Primary Contact Recreation 

Coon Creek .................................................................... 11030015 17 Primary Contact Recreation 

Hunter Creek .................................................................. 11030015 14 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
427 

Environmental Protection Agency § 131.34 

Stream segment name HUC8 Segment # Designated use 

Mead Creek .................................................................... 11030015 10 Primary Contact Recreation 

Mod Creek ...................................................................... 11030015 19 Primary Contact Recreation 

Natrona Creek ................................................................ 11030015 K38 Primary Contact Recreation 

Negro Creek ................................................................... 11030015 13 Primary Contact Recreation 

Nester Creek .................................................................. 11030015 15 Primary Contact Recreation 

Ninnescah River, West Branch South Fork ................... 11030015 5 Primary Contact Recreation 

Painter Creek ................................................................. 11030015 7 Primary Contact Recreation 

Pat Creek ....................................................................... 11030015 11 Primary Contact Recreation 

Petyt Creek .................................................................... 11030015 12 Primary Contact Recreation 

Sand Creek .................................................................... 11030015 18 Primary Contact Recreation 

Spring Creek .................................................................. 11030015 8 Primary Contact Recreation 

Wild Run Creek .............................................................. 11030015 16 Primary Contact Recreation 

Subbasin: Ninnescah 

Afton Creek .................................................................... 11030016 5 Primary Contact Recreation 

Clearwater Creek ........................................................... 11030016 4 Primary Contact Recreation 

Clearwater Creek ........................................................... 11030016 7 Primary Contact Recreation 

Dry Creek ....................................................................... 11030016 16 Primary Contact Recreation 

Elm Creek ...................................................................... 11030016 10 Primary Contact Recreation 

Garvey Creek ................................................................. 11030016 11 Primary Contact Recreation 

Sand Creek .................................................................... 11030016 14 Primary Contact Recreation 

Silver Creek .................................................................... 11030016 12 Primary Contact Recreation 

Spring Creek .................................................................. 11030016 2 Primary Contact Recreation 

Spring Creek .................................................................. 11030016 15 Primary Contact Recreation 

Turtle Creek ................................................................... 11030016 13 Primary Contact Recreation 

Subbasin: Kaw Lake 

Blue Branch .................................................................... 11060001 30 Primary Contact Recreation 

Bullington Creek ............................................................. 11060001 28 Primary Contact Recreation 

Cedar Creek ................................................................... 11060001 32 Primary Contact Recreation 

Chilocco Creek ............................................................... 11060001 19 Primary Contact Recreation 

Crabb Creek ................................................................... 11060001 29 Primary Contact Recreation 

Ferguson Creek ............................................................. 11060001 38 Primary Contact Recreation 

Franklin Creek ................................................................ 11060001 35 Primary Contact Recreation 

Gardners Branch ............................................................ 11060001 39 Primary Contact Recreation 

Goose Creek .................................................................. 11060001 34 Primary Contact Recreation 

Myers Creek ................................................................... 11060001 24 Primary Contact Recreation 

Otter Creek ..................................................................... 11060001 20 Primary Contact Recreation 

Pebble Creek ................................................................. 11060001 26 Primary Contact Recreation 

Plum Creek .................................................................... 11060001 33 Primary Contact Recreation 

Riley Creek ..................................................................... 11060001 37 Primary Contact Recreation 

School Creek .................................................................. 11060001 31 Primary Contact Recreation 

Shellrock Creek .............................................................. 11060001 22 Primary Contact Recreation 

Silver Creek .................................................................... 11060001 17 Primary Contact Recreation 

Snake Creek .................................................................. 11060001 25 Primary Contact Recreation 

Spring Creek .................................................................. 11060001 21 Primary Contact Recreation 

Turkey Creek .................................................................. 11060001 27 Primary Contact Recreation 

Wagoner Creek .............................................................. 11060001 36 Primary Contact Recreation 

Subbasin: Upper Salt Fork Arkansas 

Ash Creek ...................................................................... 11060002 20 Primary Contact Recreation 

Big Sandy Creek ............................................................ 11060002 5 Primary Contact Recreation 

Cave Creek .................................................................... 11060002 28 Primary Contact Recreation 

Deadman Creek ............................................................. 11060002 22 Primary Contact Recreation 

Dog Creek ...................................................................... 11060002 29 Primary Contact Recreation 

Hackberry Creek ............................................................ 11060002 23 Primary Contact Recreation 

Indian Creek ................................................................... 11060002 9 Primary Contact Recreation 

Inman Creek ................................................................... 11060002 21 Primary Contact Recreation 

Mustang Creek ............................................................... 11060002 31 Primary Contact Recreation 

Nescatunga Creek, East Branch ................................... 11060002 27 Primary Contact Recreation 

Red Creek ...................................................................... 11060002 16 Primary Contact Recreation 

Spring Creek .................................................................. 11060002 24 Primary Contact Recreation 

Wildcat Creek ................................................................. 11060002 12 Primary Contact Recreation 

Yellowstone Creek ......................................................... 11060002 17 Primary Contact Recreation 

Subbasin: Medicine Lodge 

Amber Creek .................................................................. 11060003 12 Primary Contact Recreation 

Antelope Creek .............................................................. 11060003 22 Primary Contact Recreation 

Bear Creek ..................................................................... 11060003 13 Secondary Contact Recreation 

Bitter Creek .................................................................... 11060003 18 Secondary Contact Recreation 

Cedar Creek ................................................................... 11060003 20 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
428 

§ 131.34 40 CFR Ch. I (7–1–08 Edition) 

Stream segment name HUC8 Segment # Designated use 

Cottonwood Creek ......................................................... 11060003 16 Primary Contact Recreation 

Crooked Creek ............................................................... 11060003 11 Primary Contact Recreation 

Litle Mule Creek ............................................................. 11060003 9 Primary Contact Recreation 

Dry Creek ....................................................................... 11060003 21 Secondary Contact Recreation 

Elm Creek, East Branch South ...................................... 11060003 10 Primary Contact Recreation 

Elm Creek, North Branch ............................................... 11060003 4 Primary Contact Recreation 

Elm Creek, South Branch .............................................. 11060003 5 Primary Contact Recreation 

Little Bear Creek ............................................................ 11060003 19 Primary Contact Recreation 

Medicine Lodge River, North Branch ............................. 11060003 24 Secondary Contact Recreation 

Mulberry Creek ............................................................... 11060003 14 Primary Contact Recreation 

Otter Creek ..................................................................... 11060003 25 Secondary Contact Recreation 

Puckett Creek ................................................................. 11060003 15 Primary Contact Recreation 

Sand Creek .................................................................... 11060003 17 Primary Contact Recreation 

Soldier Creek ................................................................. 11060003 27 Secondary Contact Recreation 

Stink Creek ..................................................................... 11060003 28 Primary Contact Recreation 

Turkey Creek .................................................................. 11060003 7 Primary Contact Recreation 

Wilson Slough ................................................................ 11060003 23 Primary Contact Recreation 

Subbasin: Lower Salt Fork Arkansas 

Camp Creek ................................................................... 11060004 68 Primary Contact Recreation 

Cooper Creek ................................................................. 11060004 71 Primary Contact Recreation 

Crooked Creek ............................................................... 11060004 24 Primary Contact Recreation 

Little Sandy Creek .......................................................... 11060004 39 Primary Contact Recreation 

Little Sandy Creek, East Branch .................................... 11060004 65 Primary Contact Recreation 

Osage Creek .................................................................. 11060004 17 Primary Contact Recreation 

Plum Creek .................................................................... 11060004 70 Primary Contact Recreation 

Pond Creek .................................................................... 11060004 18 Primary Contact Recreation 

Rush Creek .................................................................... 11060004 69 Primary Contact Recreation 

Salty Creek ..................................................................... 11060004 40 Primary Contact Recreation 

Sandy Creek .................................................................. 11060004 37 Primary Contact Recreation 

Sandy Creek, West ........................................................ 11060004 56 Primary Contact Recreation 

Spring Creek .................................................................. 11060004 66 Primary Contact Recreation 

Unnamed Stream ........................................................... 11060004 25 Primary Contact Recreation 

Subbasin: Chikaskia 

Allen Creek ..................................................................... 11060005 40 Primary Contact Recreation 

Baehr Creek ................................................................... 11060005 22 Primary Contact Recreation 

Beaver Creek ................................................................. 11060005 28 Primary Contact Recreation 

Beaver Creek ................................................................. 11060005 46 Primary Contact Recreation 

Big Spring Creek ............................................................ 11060005 34 Primary Contact Recreation 

Bitter Creek .................................................................... 11060005 4 Primary Contact Recreation 

Bitter Creek, East ........................................................... 11060005 16 Primary Contact Recreation 

Blue Stem Creek ............................................................ 11060005 48 Primary Contact Recreation 

Chicken Creek ................................................................ 11060005 36 Primary Contact Recreation 

Copper Creek ................................................................. 11060005 42 Primary Contact Recreation 

Dry Creek ....................................................................... 11060005 17 Primary Contact Recreation 

Duck Creek .................................................................... 11060005 32 Primary Contact Recreation 

Fall Creek ....................................................................... 11060005 14 Primary Contact Recreation 

Fall Creek, East Branch ................................................. 11060005 27 Primary Contact Recreation 

Goose Creek .................................................................. 11060005 38 Primary Contact Recreation 

Kemp Creek ................................................................... 11060005 49 Primary Contact Recreation 

Long Creek ..................................................................... 11060005 529 Primary Contact Recreation 

Meridian Creek ............................................................... 11060005 20 Primary Contact Recreation 

Prairie Creek .................................................................. 11060005 512 Primary Contact Recreation 

Prairie Creek, East ......................................................... 11060005 516 Primary Contact Recreation 

Prairie Creek, West ........................................................ 11060005 527 Primary Contact Recreation 

Red Creek ...................................................................... 11060005 43 Primary Contact Recreation 

Rock Creek .................................................................... 11060005 23 Primary Contact Recreation 

Rodgers Branch ............................................................. 11060005 26 Primary Contact Recreation 

Rose Bud Creek ............................................................. 11060005 44 Primary Contact Recreation 

Rush Creek .................................................................... 11060005 45 Primary Contact Recreation 

Sand Creek .................................................................... 11060005 11 Primary Contact Recreation 

Sand Creek, East ........................................................... 11060005 12 Primary Contact Recreation 

Sandy Creek .................................................................. 11060005 30 Primary Contact Recreation 

Shoo Fly Creek, East ..................................................... 11060005 19 Secondary Contact Recreation 

Shore Creek ................................................................... 11060005 35 Primary Contact Recreation 

Silver Creek .................................................................... 11060005 29 Primary Contact Recreation 

Skunk Creek ................................................................... 11060005 39 Primary Contact Recreation 

Spring Branch ................................................................ 11060005 21 Primary Contact Recreation 

Wild Horse Creek ........................................................... 11060005 41 Primary Contact Recreation 

Wildcat Creek ................................................................. 11060005 24 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
429 

Environmental Protection Agency § 131.34 

Stream segment name HUC8 Segment # Designated use 

Basin: Marais Des Cygnes 

Subbasin: Upper Marais Des Cygnes 

Appanoose Creek .......................................................... 10290101 16 Primary Contact Recreation 

Appanoose Creek, East ................................................. 10290101 89 Primary Contact Recreation 

Batch Creek ................................................................... 10290101 86 Primary Contact Recreation 

Blue Creek ..................................................................... 10290101 81 Primary Contact Recreation 

Bradshaw Creek ............................................................. 10290101 75 Primary Contact Recreation 

Cedar Creek ................................................................... 10290101 66 Primary Contact Recreation 

Cherry Creek .................................................................. 10290101 74 Primary Contact Recreation 

Chicken Creek ................................................................ 10290101 70 Primary Contact Recreation 

Chicken Creek ................................................................ 10290101 93 Primary Contact Recreation 

Coal Creek ..................................................................... 10290101 48 Primary Contact Recreation 

Dry Creek ....................................................................... 10290101 57 Primary Contact Recreation 

Dry Creek ....................................................................... 10290101 95 Primary Contact Recreation 

Duck Creek .................................................................... 10290101 41 Primary Contact Recreation 

Eightmile Creek .............................................................. 10290101 13 Primary Contact Recreation 

Frog Creek ..................................................................... 10290101 42 Primary Contact Recreation 

Hard Fish Creek ............................................................. 10290101 47 Primary Contact Recreation 

Hickory Creek ................................................................. 10290101 8 Primary Contact Recreation 

Hill Creek ........................................................................ 10290101 71 Primary Contact Recreation 

Iantha Creek ................................................................... 10290101 62 Primary Contact Recreation 

Jersey Creek .................................................................. 10290101 76 Primary Contact Recreation 

Kenoma Creek ............................................................... 10290101 64 Primary Contact Recreation 

Little Rock Creek ............................................................ 10290101 73 Primary Contact Recreation 

Long Creek ..................................................................... 10290101 K36 Primary Contact Recreation 

Locust Creek .................................................................. 10290101 69 Primary Contact Recreation 

Middle Creek .................................................................. 10290101 50 Primary Contact Recreation 

Mosquito Creek .............................................................. 10290101 52 Primary Contact Recreation 

Mud Creek ...................................................................... 10290101 49 Primary Contact Recreation 

Mud Creek ...................................................................... 10290101 78 Primary Contact Recreation 

Mud Creek ...................................................................... 10290101 91 Primary Contact Recreation 

Mute Creek ..................................................................... 10290101 92 Primary Contact Recreation 

Ottawa Creek ................................................................. 10290101 K25 Primary Contact Recreation 

Plum Creek .................................................................... 10290101 2 Primary Contact Recreation 

Plum Creek .................................................................... 10290101 79 Primary Contact Recreation 

Popcorn Creek ............................................................... 10290101 87 Primary Contact Recreation 

Pottawatomie Creek, North Fork ................................... 10290101 65 Primary Contact Recreation 

Pottawatomie Creek, South Fork ................................... 10290101 67 Primary Contact Recreation 

Rock Creek .................................................................... 10290101 43 Primary Contact Recreation 

Rock Creek .................................................................... 10290101 97 Primary Contact Recreation 

Sac Branch, South Fork ................................................. 10290101 54 Secondary Contact Recreation 

Sac Creek ...................................................................... 10290101 60 Primary Contact Recreation 

Salt Creek ...................................................................... 10290101 29 Primary Contact Recreation 

Sand Creek .................................................................... 10290101 82 Primary Contact Recreation 

Smith Creek ................................................................... 10290101 77 Primary Contact Recreation 

Spring Creek .................................................................. 10290101 84 Primary Contact Recreation 

Switzler Creek ................................................................ 10290101 80 Primary Contact Recreation 

Tauy Creek ..................................................................... 10290101 11 Primary Contact Recreation 

Tauy Creek, West Fork .................................................. 10290101 K26 Primary Contact Recreation 

Tequa Creek .................................................................. 10290101 44 Primary Contact Recreation 

Tequa Creek, East Branch ............................................ 10290101 46 Primary Contact Recreation 

Tequa Creek, South Branch .......................................... 10290101 45 Primary Contact Recreation 

Thomas Creek ................................................................ 10290101 72 Secondary Contact Recreation 

Turkey Creek .................................................................. 10290101 4 Primary Contact Recreation 

Turkey Creek .................................................................. 10290101 6 Primary Contact Recreation 

Unnamed Stream ........................................................... 10290101 5 Primary Contact Recreation 

Walnut Creek ................................................................. 10290101 90 Primary Contact Recreation 

West Fork Eight Mile Creek ........................................... 10290101 88 Primary Contact Recreation 

Willow Creek .................................................................. 10290101 94 Primary Contact Recreation 

Wilson Creek .................................................................. 10290101 83 Primary Contact Recreation 

Wolf Creek ..................................................................... 10290101 96 Primary Contact Recreation 

Subbasin: Lower Marais Des Cygnes 

Buck Creek ..................................................................... 10290102 44 Primary Contact Recreation 

Bull Creek ....................................................................... 10290102 26 Secondary Contact Recreation 

Davis Creek .................................................................... 10290102 38 Primary Contact Recreation 

Dorsey Creek ................................................................. 10290102 22 Primary Contact Recreation 

Elm Branch ..................................................................... 10290102 48 Primary Contact Recreation 

Elm Branch ..................................................................... 10290102 53 Primary Contact Recreation 

Elm Creek ...................................................................... 10290102 40 Primary Contact Recreation 

Hushpuckney Creek ....................................................... 10290102 37 Primary Contact Recreation 

Jake Branch ................................................................... 10290102 54 Secondary Contact Recreation 


rmajette on PRODPC74 with CFR
430 

§ 131.34 40 CFR Ch. I (7–1–08 Edition) 

Stream segment name HUC8 Segment # Designated use 

Jordan Branch ................................................................ 10290102 36 Primary Contact Recreation 

Little Bull Creek .............................................................. 10290102 51 Primary Contact Recreation 

Little Sugar Creek .......................................................... 10290102 33 Primary Contact Recreation 

Little Sugar Creek, North Fork ....................................... 10290102 43 Primary Contact Recreation 

Martin Creek ................................................................... 10290102 26 Primary Contact Recreation 

Middle Creek .................................................................. 10290102 13 Primary Contact Recreation 

Middle Creek .................................................................. 10290102 30 Primary Contact Recreation 

Mound Creek .................................................................. 10290102 35 Primary Contact Recreation 

Richland Creek ............................................................... 10290102 41 Primary Contact Recreation 

Rock Creek .................................................................... 10290102 27 Primary Contact Recreation 

Smith Branch .................................................................. 10290102 47 Primary Contact Recreation 

Spring Creek .................................................................. 10290102 50 Primary Contact Recreation 

Sugar Creek ................................................................... 10290102 42 Primary Contact Recreation 

Turkey Creek .................................................................. 10290102 45 Primary Contact Recreation 

Walnut Creek ................................................................. 10290102 14 Primary Contact Recreation 

Walnut Creek ................................................................. 10290102 34 Primary Contact Recreation 

Walnut Creek ................................................................. 10290102 52 Primary Contact Recreation 

Wea Creek, North .......................................................... 10290102 21 Primary Contact Recreation 

Wea Creek, South .......................................................... 10290102 18 Primary Contact Recreation 

Wea Creek, South .......................................................... 10290102 19 Primary Contact Recreation 

Wea Creek, South .......................................................... 10290102 20 Primary Contact Recreation 

Subbasin: Little Osage 

Clever Creek .................................................................. 10290103 7 Primary Contact Recreation 

Elk Creek ........................................................................ 10290103 11 Primary Contact Recreation 

Fish Creek ...................................................................... 10290103 8 Primary Contact Recreation 

Indian Creek ................................................................... 10290103 12 Primary Contact Recreation 

Irish Creek ...................................................................... 10290103 9 Primary Contact Recreation 

Laberdie Creek, East ..................................................... 10290103 13 Primary Contact Recreation 

Limestone Creek ............................................................ 10290103 5 Primary Contact Recreation 

Lost Creek ...................................................................... 10290103 10 Primary Contact Recreation 

Reagan Branch .............................................................. 10290103 6 Primary Contact Recreation 

Subbasin: Marmaton 

Buck Run ........................................................................ 10290104 46 Primary Contact Recreation 

Bunion Creek ................................................................. 10290104 39 Primary Contact Recreation 

Cedar Creek ................................................................... 10290104 41 Primary Contact Recreation 

Drywood Creek, Moores Branch .................................... 10290104 17 Primary Contact Recreation 

Drywood Creek, West Fork ............................................ 10290104 19 Primary Contact Recreation 

Elm Creek ...................................................................... 10290104 15 Secondary Contact Recreation 

Hinton Creek .................................................................. 10290104 38 Primary Contact Recreation 

Lath Branch .................................................................... 10290104 42 Primary Contact Recreation 

Little Mill Creek .............................................................. 10290104 34 Primary Contact Recreation 

Mill Creek ....................................................................... 10290104 6 Primary Contact Recreation 

Owl Creek ...................................................................... 10290104 45 Primary Contact Recreation 

Paint Creek .................................................................... 10290104 13 Primary Contact Recreation 

Paint Creek .................................................................... 10290104 14 Primary Contact Recreation 

Prong Creek ................................................................... 10290104 44 Secondary Contact Recreation 

Robinson Branch ............................................................ 10290104 40 Primary Contact Recreation 

Shiloh Creek ................................................................... 10290104 36 Primary Contact Recreation 

Sweet Branch ................................................................. 10290104 30 Primary Contact Recreation 

Tennyson Creek ............................................................. 10290104 31 Primary Contact Recreation 

Turkey Creek .................................................................. 10290104 33 Primary Contact Recreation 

Walnut Creek ................................................................. 10290104 32 Primary Contact Recreation 

Walnut Creek ................................................................. 10290104 47 Primary Contact Recreation 

Wolfpen Creek ............................................................... 10290104 37 Primary Contact Recreation 

Wolverine Creek ............................................................. 10290104 35 Primary Contact Recreation 

Subbasin: South Grand 

Harless Creek ................................................................ 10290108 67 Primary Contact Recreation 

Poney Creek .................................................................. 10290108 48 Primary Contact Recreation 

Basin: Missouri 

Subbasin: Tarkio-Wolf 

Cold Ryan Branch .......................................................... 10240005 70 Primary Contact Recreation 

Coon Creek .................................................................... 10240005 71 Primary Contact Recreation 

Halling Creek .................................................................. 10240005 68 Primary Contact Recreation 

Mill Creek ....................................................................... 10240005 52 Primary Contact Recreation 

Rittenhouse Branch ........................................................ 10240005 69 Primary Contact Recreation 

Spring Creek .................................................................. 10240005 65 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
431 

Environmental Protection Agency § 131.34 

Stream segment name HUC8 Segment # Designated use 

Striker Branch ................................................................ 10240005 72 Primary Contact Recreation 

Wolf River, Middle Fork ................................................. 10240005 67 Primary Contact Recreation 

Wolf River, North Fork ................................................... 10240005 66 Primary Contact Recreation 

Wolf River, South Fork ................................................... 10240005 57 Primary Contact Recreation 

Unnamed Stream ........................................................... 10240005 55 Primary Contact Recreation 

Subbasin: South Fork Big Nemaha 

Burger Creek .................................................................. 10240007 24 Secondary Contact Recreation 

Deer Creek ..................................................................... 10240007 18 Primary Contact Recreation 

Fisher Creek ................................................................... 10240007 28 Primary Contact Recreation 

Illinois Creek ................................................................... 10240007 30 Primary Contact Recreation 

Rattlesnake Creek .......................................................... 10240007 27 Primary Contact Recreation 

Rock Creek .................................................................... 10240007 20 Primary Contact Recreation 

Tennessee Creek ........................................................... 10240007 29 Primary Contact Recreation 

Turkey Creek .................................................................. 10240007 4 Primary Contact Recreation 

Turkey Creek .................................................................. 10240007 5 Primary Contact Recreation 

Wildcat Creek ................................................................. 10240007 23 Primary Contact Recreation 

Wildcat Creek ................................................................. 10240007 22 Primary Contact Recreation 

Wolf Pen Creek .............................................................. 10240007 25 Primary Contact Recreation 

Subbasin: Big Nemaha 

Noharts Creek ................................................................ 10240008 42 Primary Contact Recreation 

Pedee Creek .................................................................. 10240008 41 Primary Contact Recreation 

Pony Creek .................................................................... 10240008 38 Primary Contact Recreation 

Roys Creek .................................................................... 10240008 40 Primary Contact Recreation 

Subbasin: Independence—Sugar 

Brush Creek ................................................................... 10240011 26 Primary Contact Recreation 

Deer Creek ..................................................................... 10240011 32 Primary Contact Recreation 

Fivemile Creek ............................................................... 10240011 35 Primary Contact Recreation 

Independence Creek, North Branch .............................. 10240011 29 Primary Contact Recreation 

Jordan Creek .................................................................. 10240011 30 Primary Contact Recreation 

Owl Creek ...................................................................... 10240011 33 Primary Contact Recreation 

Rock Creek .................................................................... 10240011 21 Primary Contact Recreation 

Salt Creek ...................................................................... 10240011 34 Primary Contact Recreation 

Smith Creek ................................................................... 10240011 28 Primary Contact Recreation 

Three Mile Creek ........................................................... 10240011 36 Primary Contact Recreation 

Walnut Creek ................................................................. 10240011 23 Primary Contact Recreation 

Walnut Creek ................................................................. 10240011 25 Primary Contact Recreation 

White Clay Creek ........................................................... 10240011 31 Primary Contact Recreation 

White Clay Creek ........................................................... 10240011 9031 Primary Contact Recreation 

Whiskey Creek ............................................................... 10240011 235 Primary Contact Recreation 

Whiskey Creek ............................................................... 10240011 9235 Primary Contact Recreation 

Subbasin: Lower Missouri—Crooked 

Brush Creek ................................................................... 10300101 54 Primary Contact Recreation 

Camp Branch ................................................................. 10300101 56 Primary Contact Recreation 

Coffee Creek .................................................................. 10300101 57 Primary Contact Recreation 

Dyke Branch ................................................................... 10300101 55 Primary Contact Recreation 

Indian Creek ................................................................... 10300101 32 Primary Contact Recreation 

Negro Creek ................................................................... 10300101 58 Primary Contact Recreation 

Tomahawk Creek ........................................................... 10300101 53 Primary Contact Recreation 

Basin: Neosho 

Subbasin: Neosho Headwaters 

Allen Creek ..................................................................... 11070201 5 Primary Contact Recreation 

Badger Creek ................................................................. 11070201 45 Primary Contact Recreation 

Big John Creek .............................................................. 11070201 37 Primary Contact Recreation 

Bluff Creek ..................................................................... 11070201 8 Primary Contact Recreation 

Crooked Creek ............................................................... 11070201 35 Primary Contact Recreation 

Dows Creek .................................................................... 11070201 3 Primary Contact Recreation 

Dows Creek .................................................................... 11070201 4 Primary Contact Recreation 

Eagle Creek ................................................................... 11070201 25 Primary Contact Recreation 

Eagle Creek, South ........................................................ 11070201 47 Primary Contact Recreation 

East Creek ..................................................................... 11070201 39 Primary Contact Recreation 

Elm Creek ...................................................................... 11070201 36 Primary Contact Recreation 

Fourmile Creek ............................................................... 11070201 24 Primary Contact Recreation 

Fourmile Creek ............................................................... 11070201 48 Primary Contact Recreation 

Haun Creek .................................................................... 11070201 29 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
432 

§ 131.34 40 CFR Ch. I (7–1–08 Edition) 

Stream segment name HUC8 Segment # Designated use 

Horse Creek ................................................................... 11070201 33 Primary Contact Recreation 

Kahola Creek ................................................................. 11070201 43 Primary Contact Recreation 

Lairds Creek ................................................................... 11070201 30 Primary Contact Recreation 

Lanos Creek ................................................................... 11070201 21 Primary Contact Recreation 

Lebo Creek ..................................................................... 11070201 51 Primary Contact Recreation 

Munkers Creek, East Branch ......................................... 11070201 31 Primary Contact Recreation 

Munkers Creek, Middle Branch ..................................... 11070201 32 Primary Contact Recreation 

Neosho River, East Fork ................................................ 11070201 18 Primary Contact Recreation 

Neosho River, West Fork ............................................... 11070201 28 Primary Contact Recreation 

Parkers Creek ................................................................ 11070201 27 Primary Contact Recreation 

Plum Creek .................................................................... 11070201 50 Primary Contact Recreation 

Plumb Creek .................................................................. 11070201 49 Primary Contact Recreation 

Rock Creek .................................................................... 11070201 7 Primary Contact Recreation 

Rock Creek .................................................................... 11070201 9 Primary Contact Recreation 

Rock Creek, East Branch .............................................. 11070201 34 Primary Contact Recreation 

Spring Creek .................................................................. 11070201 40 Primary Contact Recreation 

Stillman Creek ................................................................ 11070201 44 Primary Contact Recreation 

Taylor Creek ................................................................... 11070201 46 Primary Contact Recreation 

Walker Branch ................................................................ 11070201 42 Primary Contact Recreation 

Wolf Creek ..................................................................... 11070201 41 Primary Contact Recreation 

Wrights Creek ................................................................ 11070201 38 Primary Contact Recreation 

Subbasin: Upper Cottonwood 

Antelope Creek .............................................................. 11070202 19 Primary Contact Recreation 

Bills Creek ...................................................................... 11070202 30 Primary Contact Recreation 

Bruno Creek ................................................................... 11070202 27 Primary Contact Recreation 

Catlin Creek ................................................................... 11070202 20 Primary Contact Recreation 

Clear Creek .................................................................... 11070202 5 Primary Contact Recreation 

Clear Creek, East Branch .............................................. 11070202 24 Primary Contact Recreation 

Coon Creek .................................................................... 11070202 32 Primary Contact Recreation 

Cottonwood River, South ............................................... 11070202 17 Primary Contact Recreation 

Cottonwood River, South ............................................... 11070202 18 Primary Contact Recreation 

Doyle Creek ................................................................... 11070202 21 Primary Contact Recreation 

French Creek ................................................................. 11070202 16 Primary Contact Recreation 

Mud Creek ...................................................................... 11070202 6 Primary Contact Recreation 

Perry Creek .................................................................... 11070202 23 Primary Contact Recreation 

Spring Branch ................................................................ 11070202 26 Primary Contact Recreation 

Spring Creek .................................................................. 11070202 28 Primary Contact Recreation 

Spring Creek .................................................................. 11070202 29 Primary Contact Recreation 

Stony Brook .................................................................... 11070202 25 Primary Contact Recreation 

Turkey Creek .................................................................. 11070202 31 Primary Contact Recreation 

Subbasin: Lower Cottonwood 

Beaver Creek ................................................................. 11070203 29 Primary Contact Recreation 

Bloody Creek .................................................................. 11070203 40 Primary Contact Recreation 

Buck Creek ..................................................................... 11070203 39 Primary Contact Recreation 

Buckeye Creek ............................................................... 11070203 44 Primary Contact Recreation 

Bull Creek ....................................................................... 11070203 26 Primary Contact Recreation 

Camp Creek ................................................................... 11070203 14 Primary Contact Recreation 

Coal Creek ..................................................................... 11070203 43 Primary Contact Recreation 

Collett Creek .................................................................. 11070203 21 Primary Contact Recreation 

Corn Creek ..................................................................... 11070203 47 Primary Contact Recreation 

Coyne Branch ................................................................ 11070203 33 Primary Contact Recreation 

Crocker Creek ................................................................ 11070203 46 Primary Contact Recreation 

Dodds Creek .................................................................. 11070203 15 Primary Contact Recreation 

Fox Creek ....................................................................... 11070203 19 Primary Contact Recreation 

French Creek ................................................................. 11070203 32 Primary Contact Recreation 

Gannon Creek ................................................................ 11070203 24 Primary Contact Recreation 

Gould Creek ................................................................... 11070203 36 Primary Contact Recreation 

Holmes Creek ................................................................ 11070203 35 Primary Contact Recreation 

Jacob Creek ................................................................... 11070203 28 Primary Contact Recreation 

Kirk Creek ...................................................................... 11070203 48 Primary Contact Recreation 

Little Cedar Creek .......................................................... 11070203 11 Primary Contact Recreation 

Little Cedar Creek .......................................................... 11070203 45 Primary Contact Recreation 

Middle Creek .................................................................. 11070203 5 Primary Contact Recreation 

Mile-and-a-half Creek ..................................................... 11070203 13 Secondary Contact Recreation 

Moon Creek .................................................................... 11070203 31 Primary Contact Recreation 

Mulvane Creek ............................................................... 11070203 22 Primary Contact Recreation 

Peyton Creek ................................................................. 11070203 25 Primary Contact Recreation 

Phenis Creek .................................................................. 11070203 30 Primary Contact Recreation 

Pickett Creek .................................................................. 11070203 18 Primary Contact Recreation 

Prather Creek ................................................................. 11070203 23 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
433 

Environmental Protection Agency § 131.34 

Stream segment name HUC8 Segment # Designated use 

Rock Creek .................................................................... 11070203 37 Primary Contact Recreation 

Schaffer Creek ............................................................... 11070203 17 Primary Contact Recreation 

School Creek .................................................................. 11070203 16 Primary Contact Recreation 

Sharpes Creek ............................................................... 11070203 38 Primary Contact Recreation 

Silver Creek .................................................................... 11070203 34 Primary Contact Recreation 

Spring Creek .................................................................. 11070203 41 Primary Contact Recreation 

Stout Run ....................................................................... 11070203 27 Primary Contact Recreation 

Stribby Creek ................................................................. 11070203 20 Primary Contact Recreation 

Subbasin: Upper Neosho 

Badger Creek ................................................................. 11070204 42 Primary Contact Recreation 

Big Creek, North ............................................................ 11070204 16 Primary Contact Recreation 

Big Creek, South ............................................................ 11070204 17 Primary Contact Recreation 

Bloody Run ..................................................................... 11070204 25 Primary Contact Recreation 

Carlyle Creek ................................................................. 11070204 47 Primary Contact Recreation 

Charles Branch .............................................................. 11070204 27 Primary Contact Recreation 

Cherry Creek .................................................................. 11070204 20 Primary Contact Recreation 

Coal Creek ..................................................................... 11070204 4 Primary Contact Recreation 

Cottonwood Creek ......................................................... 11070204 48 Primary Contact Recreation 

Crooked Creek ............................................................... 11070204 44 Primary Contact Recreation 

Draw Creek .................................................................... 11070204 34 Primary Contact Recreation 

Goose Creek .................................................................. 11070204 29 Primary Contact Recreation 

Long Creek ..................................................................... 11070204 12 Primary Contact Recreation 

Martin Creek ................................................................... 11070204 49 Primary Contact Recreation 

Mud Creek ...................................................................... 11070204 26 Primary Contact Recreation 

Mud Creek ...................................................................... 11070204 31 Primary Contact Recreation 

Onion Creek ................................................................... 11070204 24 Primary Contact Recreation 

Owl Creek ...................................................................... 11070204 19 Primary Contact Recreation 

Owl Creek ...................................................................... 11070204 21 Primary Contact Recreation 

Plum Creek .................................................................... 11070204 22 Primary Contact Recreation 

Rock Creek .................................................................... 11070204 7 Primary Contact Recreation 

Rock Creek .................................................................... 11070204 23 Primary Contact Recreation 

Rock Creek .................................................................... 11070204 15 Primary Contact Recreation 

School Creek .................................................................. 11070204 38 Primary Contact Recreation 

Scott Creek .................................................................... 11070204 40 Primary Contact Recreation 

Slack Creek .................................................................... 11070204 30 Primary Contact Recreation 

Spring Creek .................................................................. 11070204 46 Primary Contact Recreation 

Sutton Creek .................................................................. 11070204 35 Primary Contact Recreation 

Turkey Branch ................................................................ 11070204 28 Primary Contact Recreation 

Turkey Creek .................................................................. 11070204 18 Primary Contact Recreation 

Turkey Creek .................................................................. 11070204 32 Primary Contact Recreation 

Twiss Creek ................................................................... 11070204 45 Primary Contact Recreation 

Varvel Creek .................................................................. 11070204 43 Primary Contact Recreation 

Village Creek .................................................................. 11070204 33 Primary Contact Recreation 

Wolf Creek ..................................................................... 11070204 37 Primary Contact Recreation 

Subbasin: Middle Neosho 

Bachelor Creek .............................................................. 11070205 40 Primary Contact Recreation 

Canville Creek ................................................................ 11070205 16 Primary Contact Recreation 

Center Creek .................................................................. 11070205 25 Primary Contact Recreation 

Cherry Creek .................................................................. 11070205 4 Primary Contact Recreation 

Deer Creek ..................................................................... 11070205 27 Primary Contact Recreation 

Denny Branch ................................................................ 11070205 31 Primary Contact Recreation 

Elk Creek ........................................................................ 11070205 19 Primary Contact Recreation 

Elm Creek ...................................................................... 11070205 43 Primary Contact Recreation 

Flat Rock Creek ............................................................. 11070205 12 Primary Contact Recreation 

Flat Rock Creek ............................................................. 11070205 14 Primary Contact Recreation 

Fourmile Creek ............................................................... 11070205 49 Primary Contact Recreation 

Grindstone Creek ........................................................... 11070205 42 Primary Contact Recreation 

Hickory Creek ................................................................. 11070205 10 Primary Contact Recreation 

Lake Creek ..................................................................... 11070205 24 Primary Contact Recreation 

Lightning Creek .............................................................. 11070205 6 Primary Contact Recreation 

Lightning Creek .............................................................. 11070205 8 Primary Contact Recreation 

Limestone Creek ............................................................ 11070205 7 Primary Contact Recreation 

Little Cherry Creek ......................................................... 11070205 32 Primary Contact Recreation 

Little Elk Creek ............................................................... 11070205 47 Primary Contact Recreation 

Little Fly Creek ............................................................... 11070205 26 Secondary Contact Recreation 

Little Labette Creek ........................................................ 11070205 23 Primary Contact Recreation 

Little Walnut Creek ......................................................... 11070205 46 Primary Contact Recreation 

Litup Creek ..................................................................... 11070205 36 Primary Contact Recreation 

Mulberry Creek ............................................................... 11070205 35 Primary Contact Recreation 

Murphy Creek ................................................................. 11070205 41 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
434 

§ 131.34 40 CFR Ch. I (7–1–08 Edition) 

Stream segment name HUC8 Segment # Designated use 

Ogeese Creek ................................................................ 11070205 38 Primary Contact Recreation 

Pecan Creek .................................................................. 11070205 45 Primary Contact Recreation 

Plum Creek .................................................................... 11070205 34 Primary Contact Recreation 

Rock Creek .................................................................... 11070205 48 Primary Contact Recreation 

Spring Creek .................................................................. 11070205 30 Primary Contact Recreation 

Stink Branch ................................................................... 11070205 37 Primary Contact Recreation 

Thunderbolt Creek ......................................................... 11070205 44 Primary Contact Recreation 

Tolen Creek .................................................................... 11070205 39 Primary Contact Recreation 

Town Creek .................................................................... 11070205 28 Primary Contact Recreation 

Turkey Creek .................................................................. 11070205 29 Primary Contact Recreation 

Walnut Creek ................................................................. 11070205 13 Primary Contact Recreation 

Wolf Creek ..................................................................... 11070205 33 Primary Contact Recreation 

Subbasin: Lake O’ the Cherokees 

Fourmile Creek ............................................................... 11070206 18 Primary Contact Recreation 

Tar Creek ....................................................................... 11070206 19 Primary Contact Recreation 

Subbasin: Spring 

Little Shawnee Creek ..................................................... 11070207 22 Primary Contact Recreation 

Long Branch ................................................................... 11070207 21 Primary Contact Recreation 

Shawnee Creek .............................................................. 11070207 17 Primary Contact Recreation 

Taylor Branch ................................................................. 11070207 25 Primary Contact Recreation 

Willow Creek .................................................................. 11070207 20 Primary Contact Recreation 

Basin: Smoky Hill/Saline 

Subbasin: Middle Smoky Hill 

Ash Creek ...................................................................... 10260006 37 Primary Contact Recreation 

Big Timber Creek ........................................................... 10260006 24 Primary Contact Recreation 

Big Timber Creek ........................................................... 10260006 25 Primary Contact Recreation 

Big Timber Creek ........................................................... 10260006 27 Primary Contact Recreation 

Blood Creek ................................................................... 10260006 35 Secondary Contact Recreation 

Buck Creek ..................................................................... 10260006 29 Primary Contact Recreation 

Buffalo Creek ................................................................. 10260006 6 Primary Contact Recreation 

Clear Creek .................................................................... 10260006 42 Primary Contact Recreation 

Coal Creek ..................................................................... 10260006 34 Primary Contact Recreation 

Cow Creek ..................................................................... 10260006 38 Primary Contact Recreation 

Eagle Creek ................................................................... 10260006 30 Primary Contact Recreation 

Fossil Creek ................................................................... 10260006 13 Primary Contact Recreation 

Goose Creek .................................................................. 10260006 39 Primary Contact Recreation 

Landon Creek ................................................................. 10260006 31 Primary Contact Recreation 

Loss Creek ..................................................................... 10260006 44 Primary Contact Recreation 

Mud Creek ...................................................................... 10260006 47 Primary Contact Recreation 

Oxide Creek ................................................................... 10260006 45 Primary Contact Recreation 

Sellens Creek ................................................................. 10260006 32 Primary Contact Recreation 

Shelter Creek ................................................................. 10260006 43 Primary Contact Recreation 

Skunk Creek ................................................................... 10260006 48 Primary Contact Recreation 

Spring Creek .................................................................. 10260006 41 Primary Contact Recreation 

Timber Creek ................................................................. 10260006 26 Primary Contact Recreation 

Turkey Creek .................................................................. 10260006 46 Primary Contact Recreation 

Unnamed Stream ........................................................... 10260006 20 Primary Contact Recreation 

Unnamed Stream ........................................................... 10260006 23 Primary Contact Recreation 

Unnamed Stream ........................................................... 10260006 28 Primary Contact Recreation 

Wilson Creek .................................................................. 10260006 40 Primary Contact Recreation 

Wolf Creek ..................................................................... 10260006 36 Primary Contact Recreation 

Subbasin: Lower Smoky Hill 

Basket Creek .................................................................. 10260008 40 Primary Contact Recreation 

Battle Creek ................................................................... 10260008 23 Primary Contact Recreation 

Carry Creek .................................................................... 10260008 32 Primary Contact Recreation 

Carry Creek .................................................................... 10260008 35 Primary Contact Recreation 

Chapman Creek, West ................................................... 10260008 5 Primary Contact Recreation 

Dry Creek ....................................................................... 10260008 36 Primary Contact Recreation 

Dry Creek, East .............................................................. 10260008 43 Primary Contact Recreation 

Hobbs Creek .................................................................. 10260008 48 Primary Contact Recreation 

Holland Creek ................................................................ 10260008 25 Primary Contact Recreation 

Holland Creek, East ....................................................... 10260008 27 Primary Contact Recreation 

Holland Creek, West ...................................................... 10260008 26 Primary Contact Recreation 

Kentucky Creek .............................................................. 10260008 17 Secondary Contact Recreation 

Kentucky Creek, West ................................................... 10260008 54 Primary Contact Recreation 

Lone Tree Creek ............................................................ 10260008 41 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
435 

Environmental Protection Agency § 131.34 

Stream segment name HUC8 Segment # Designated use 

Lyon Creek, West Branch .............................................. 10260008 34 Primary Contact Recreation 

Mcallister Creek ............................................................. 10260008 49 Primary Contact Recreation 

Middle Branch ................................................................ 10260008 58 Primary Contact Recreation 

Mud Creek ...................................................................... 10260008 8 Primary Contact Recreation 

Otter Creek ..................................................................... 10260008 42 Primary Contact Recreation 

Paint Creek .................................................................... 10260008 52 Secondary Contact Recreation 

Pewee Creek .................................................................. 10260008 56 Primary Contact Recreation 

Sand Creek .................................................................... 10260008 46 Primary Contact Recreation 

Sharps Creek ................................................................. 10260008 16 Secondary Contact Recreation 

Spring Creek .................................................................. 10260008 45 Primary Contact Recreation 

Stag Creek ..................................................................... 10260008 19 Primary Contact Recreation 

Turkey Creek .................................................................. 10260008 28 Primary Contact Recreation 

Turkey Creek .................................................................. 10260008 30 Primary Contact Recreation 

Turkey Creek, East ........................................................ 10260008 50 Primary Contact Recreation 

Turkey Creek, West Branch ........................................... 10260008 29 Primary Contact Recreation 

Unnamed Stream ........................................................... 10260008 K3 Primary Contact Recreation 

Unnamed Stream ........................................................... 10260008 K4 Primary Contact Recreation 

Unnamed Stream ........................................................... 10260008 K24 Primary Contact Recreation 

Wiley Creek .................................................................... 10260008 47 Primary Contact Recreation 

Subbasin: Upper Saline 

Cedar Creek ................................................................... 10260009 30 Secondary Contact Recreation 

Chalk Creek ................................................................... 10260009 26 Primary Contact Recreation 

Coyote Creek ................................................................. 10260009 23 Primary Contact Recreation 

Eagle Creek ................................................................... 10260009 6 Primary Contact Recreation 

Happy Creek .................................................................. 10260009 25 Primary Contact Recreation 

Paradise Creek .............................................................. 10260009 5 Primary Contact Recreation 

Salt Creek ...................................................................... 10260009 20 Primary Contact Recreation 

Spring Creek, East ......................................................... 10260009 10 Primary Contact Recreation 

Sweetwater Creek .......................................................... 10260009 29 Primary Contact Recreation 

Trego Creek ................................................................... 10260009 19 Primary Contact Recreation 

Unnamed Stream ........................................................... 10260009 13 Primary Contact Recreation 

Wild Horse Creek ........................................................... 10260009 27 Primary Contact Recreation 

Subbasin: Lower Saline 

Bacon Creek .................................................................. 10260010 7 Primary Contact Recreation 

Blue Stem Creek ............................................................ 10260010 33 Primary Contact Recreation 

Coon Creek .................................................................... 10260010 31 Primary Contact Recreation 

Dry Creek ....................................................................... 10260010 29 Secondary Contact Recreation 

Eff Creek ........................................................................ 10260010 23 Primary Contact Recreation 

Elkhorn Creek ................................................................ 10260010 17 Primary Contact Recreation 

Elkhorn Creek, West ...................................................... 10260010 38 Primary Contact Recreation 

Fourmile Creek ............................................................... 10260010 30 Primary Contact Recreation 

Lost Creek ...................................................................... 10260010 34 Secondary Contact Recreation 

Owl Creek ...................................................................... 10260010 18 Primary Contact Recreation 

Owl Creek ...................................................................... 10260010 39 Primary Contact Recreation 

Ralston Creek ................................................................ 10260010 28 Primary Contact Recreation 

Shaw Creek .................................................................... 10260010 41 Primary Contact Recreation 

Spillman Creek ............................................................... 10260010 6 Primary Contact Recreation 

Spillman Creek, North Branch ....................................... 10260010 8 Primary Contact Recreation 

Spring Creek .................................................................. 10260010 16 Primary Contact Recreation 

Spring Creek .................................................................. 10260010 19 Primary Contact Recreation 

Spring Creek .................................................................. 10260010 20 Primary Contact Recreation 

Spring Creek .................................................................. 10260010 24 Primary Contact Recreation 

Spring Creek .................................................................. 10260010 26 Primary Contact Recreation 

Spring Creek .................................................................. 10260010 27 Primary Contact Recreation 

Table Rock Creek .......................................................... 10260010 40 Primary Contact Recreation 

Trail Creek ...................................................................... 10260010 32 Secondary Contact Recreation 

Twelvemile Creek ........................................................... 10260010 36 Primary Contact Recreation 

Twin Creek, West ........................................................... 10260010 37 Secondary Contact Recreation 

West Spring Creek ......................................................... 10260010 25 Primary Contact Recreation 

Wolf Creek ..................................................................... 10260010 10 Primary Contact Recreation 

Wolf Creek, East Fork .................................................... 10260010 11 Primary Contact Recreation 

Wolf Creek, West Fork ................................................... 10260010 12 Primary Contact Recreation 

Yauger Creek ................................................................. 10260010 35 Primary Contact Recreation 

Basin: Solomon 

Subbasin: Upper North Fork Solomon 

Ash Creek ...................................................................... 10260011 24 Primary Contact Recreation 

Beaver Creek ................................................................. 10260011 23 Primary Contact Recreation 

Big Timber Creek ........................................................... 10260011 8 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
436 

§ 131.34 40 CFR Ch. I (7–1–08 Edition) 

Stream segment name HUC8 Segment # Designated use 

Bow Creek ...................................................................... 10260011 15 Primary Contact Recreation 

Cactus Creek ................................................................. 10260011 28 Primary Contact Recreation 

Crooked Creek ............................................................... 10260011 6 Primary Contact Recreation 

Elk Creek ........................................................................ 10260011 12 Primary Contact Recreation 

Elk Creek, East .............................................................. 10260011 25 Primary Contact Recreation 

Game Creek ................................................................... 10260011 10 Primary Contact Recreation 

Game Creek ................................................................... 10260011 27 Primary Contact Recreation 

Lost Creek ...................................................................... 10260011 20 Primary Contact Recreation 

Sand Creek .................................................................... 10260011 26 Primary Contact Recreation 

Scull Creek ..................................................................... 10260011 21 Primary Contact Recreation 

Spring Creek .................................................................. 10260011 19 Primary Contact Recreation 

Wolf Creek ..................................................................... 10260011 22 Primary Contact Recreation 

Subbasin: Lower North Fork Solomon 

Beaver Creek ................................................................. 10260012 10 Primary Contact Recreation 

Beaver Creek, East Branch ........................................... 10260012 11 Primary Contact Recreation 

Beaver Creek, Middle .................................................... 10260012 12 Primary Contact Recreation 

Beaver Creek, Middle .................................................... 10260012 13 Primary Contact Recreation 

Beaver Creek, West ....................................................... 10260012 14 Secondary Contact Recreation 

Big Creek ....................................................................... 10260012 26 Primary Contact Recreation 

Boughton Creek ............................................................. 10260012 34 Primary Contact Recreation 

Buck Creek ..................................................................... 10260012 43 Secondary Contact Recreation 

Cedar Creek ................................................................... 10260012 16 Primary Contact Recreation 

Cedar Creek ................................................................... 10260012 18 Primary Contact Recreation 

Cedar Creek, East ......................................................... 10260012 17 Primary Contact Recreation 

Cedar Creek, East Middle .............................................. 10260012 37 Primary Contact Recreation 

Cedar Creek, Middle ...................................................... 10260012 19 Secondary Contact Recreation 

Deer Creek ..................................................................... 10260012 23 Primary Contact Recreation 

Deer Creek ..................................................................... 10260012 25 Primary Contact Recreation 

Deer Creek ..................................................................... 10260012 27 Primary Contact Recreation 

Deer Creek ..................................................................... 10260012 29 Primary Contact Recreation 

Deer Creek ..................................................................... 10260012 31 Primary Contact Recreation 

Dry Creek ....................................................................... 10260012 42 Primary Contact Recreation 

Glen Rock Creek ............................................................ 10260012 41 Primary Contact Recreation 

Lawrence Creek ............................................................. 10260012 44 Primary Contact Recreation 

Lindley Creek ................................................................. 10260012 45 Primary Contact Recreation 

Little Oak Creek ............................................................. 10260012 3 Primary Contact Recreation 

Medicine Creek .............................................................. 10260012 33 Primary Contact Recreation 

Oak Creek ...................................................................... 10260012 2 Primary Contact Recreation 

Oak Creek ...................................................................... 10260012 4 Primary Contact Recreation 

Oak Creek, East ............................................................. 10260012 40 Primary Contact Recreation 

Oak Creek, West ............................................................ 10260012 39 Secondary Contact Recreation 

Plotner Creek ................................................................. 10260012 30 Primary Contact Recreation 

Plum Creek .................................................................... 10260012 20 Primary Contact Recreation 

Spring Creek .................................................................. 10260012 8 Secondary Contact Recreation 

Spring Creek .................................................................. 10260012 28 Secondary Contact Recreation 

Starvation Creek ............................................................ 10260012 38 Primary Contact Recreation 

Turner Creek .................................................................. 10260012 24 Primary Contact Recreation 

Subbasin: Upper South Fork Solomon 

Spring Creek .................................................................. 10260013 5 Primary Contact Recreation 

Subbasin: Lower South Fork Solomon 

Ash Creek ...................................................................... 10260014 22 Primary Contact Recreation 

Boxelder Creek .............................................................. 10260014 14 Primary Contact Recreation 

Carr Creek ...................................................................... 10260014 21 Primary Contact Recreation 

Covert Creek .................................................................. 10260014 19 Primary Contact Recreation 

Crooked Creek ............................................................... 10260014 27 Primary Contact Recreation 

Dibble Creek .................................................................. 10260014 23 Primary Contact Recreation 

Elm Creek ...................................................................... 10260014 15 Primary Contact Recreation 

Jim Creek ....................................................................... 10260014 25 Primary Contact Recreation 

Kill Creek ........................................................................ 10260014 18 Primary Contact Recreation 

Kill Creek, East .............................................................. 10260014 28 Primary Contact Recreation 

Lost Creek ...................................................................... 10260014 13 Primary Contact Recreation 

Lucky Creek ................................................................... 10260014 26 Primary Contact Recreation 

Medicine Creek .............................................................. 10260014 16 Primary Contact Recreation 

Medicine Creek .............................................................. 10260014 17 Primary Contact Recreation 

Robbers Roost Creek .................................................... 10260014 24 Primary Contact Recreation 

Twin Creek ..................................................................... 10260014 20 Primary Contact Recreation 

Twin Creek, East ............................................................ 10260014 29 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
437 

Environmental Protection Agency § 131.34 

Stream segment name HUC8 Segment # Designated use 

Subbasin: Solomon River 

Cow Creek ..................................................................... 10260015 28 Primary Contact Recreation 

Fifth Creek ...................................................................... 10260015 45 Secondary Contact Recreation 

Granite Creek ................................................................. 10260015 24 Secondary Contact Recreation 

Leban Creek ................................................................... 10260015 41 Secondary Contact Recreation 

Mill Creek ....................................................................... 10260015 38 Secondary Contact Recreation 

Mulberry Creek ............................................................... 10260015 36 Secondary Contact Recreation 

Pipe Creek ..................................................................... 10260015 9 Primary Contact Recreation 

Walnut Creek ................................................................. 10260015 26 Secondary Contact Recreation 

Basin: Upper Arkansas 

Subbasin: Buckner 

Buckner Creek, South Fork ........................................... 11030006 6 Primary Contact Recreation 

Duck Creek .................................................................... 11030006 8 Secondary Contact Recreation 

Elm Creek ...................................................................... 11030006 5 Primary Contact Recreation 

Saw Log Creek .............................................................. 11030006 3 Primary Contact Recreation 

Saw Log Creek .............................................................. 11030006 4 Secondary Contact Recreation 

Subbasin: Lower Walnut Creek 

Alexander Dry Creek ...................................................... 11030008 7 Secondary Contact Recreation 

Bazine Creek .................................................................. 11030008 9 Secondary Contact Recreation 

Boot Creek ..................................................................... 11030008 15 Secondary Contact Recreation 

Dry Creek ....................................................................... 11030008 14 Secondary Contact Recreation 

Dry Walnut Creek ........................................................... 11030008 13 Secondary Contact Recreation 

Otter Creek ..................................................................... 11030008 12 Primary Contact Recreation 

Sand Creek .................................................................... 11030008 3 Secondary Contact Recreation 

Sandy Creek .................................................................. 11030008 11 Secondary Contact Recreation 

Walnut Creek ................................................................. 11030008 1 Primary Contact Recreation 

Walnut Creek ................................................................. 11030008 2 Primary Contact Recreation 

Walnut Creek ................................................................. 11030008 4 Primary Contact Recreation 

Basin: Upper Republican 

Subbasin: South Fork Republican 

Big Timber Creek ........................................................... 10250003 61 Secondary Contact Recreation 

Subbasin: Beaver 

Beaver Creek ................................................................. 10250014 2 Secondary Contact Recreation 

Basin: Verdigris 

Subbasin: Upper Verdigris 

Bachelor Creek .............................................................. 11070101 21 Primary Contact Recreation 

Bernard Creek ................................................................ 11070101 24 Secondary Contact Recreation 

Big Cedar Creek ............................................................ 11070101 39 Primary Contact Recreation 

Brazil Creek .................................................................... 11070101 31 Primary Contact Recreation 

Buffalo Creek ................................................................. 11070101 2 Primary Contact Recreation 

Buffalo Creek, West ....................................................... 11070101 34 Primary Contact Recreation 

Cedar Creek ................................................................... 11070101 32 Primary Contact Recreation 

Chetopa Creek ............................................................... 11070101 22 Primary Contact Recreation 

Crooked Creek ............................................................... 11070101 38 Primary Contact Recreation 

Dry Creek ....................................................................... 11070101 27 Primary Contact Recreation 

Elder Branch .................................................................. 11070101 37 Primary Contact Recreation 

Fancy Creek ................................................................... 11070101 28 Primary Contact Recreation 

Greenhall Creek ............................................................. 11070101 26 Primary Contact Recreation 

Holderman Creek ........................................................... 11070101 47 Primary Contact Recreation 

Homer Creek .................................................................. 11070101 20 Primary Contact Recreation 

Kelly Branch ................................................................... 11070101 42 Primary Contact Recreation 

Kuntz Branch .................................................................. 11070101 29 Primary Contact Recreation 

Little Sandy Creek .......................................................... 11070101 33 Primary Contact Recreation 

Long Creek ..................................................................... 11070101 45 Primary Contact Recreation 

Miller Creek .................................................................... 11070101 30 Primary Contact Recreation 

Moon Branch .................................................................. 11070101 43 Primary Contact Recreation 

Onion Creek ................................................................... 11070101 23 Primary Contact Recreation 

Rock Creek .................................................................... 11070101 14 Primary Contact Recreation 

Ross Branch ................................................................... 11070101 35 Primary Contact Recreation 

Sandy Creek .................................................................. 11070101 4 Primary Contact Recreation 

Shaw Creek .................................................................... 11070101 40 Primary Contact Recreation 

Slate Creek .................................................................... 11070101 25 Primary Contact Recreation 

Snake Creek .................................................................. 11070101 36 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
438 

§ 131.34 40 CFR Ch. I (7–1–08 Edition) 

Stream segment name HUC8 Segment # Designated use 

Tate Branch Creek ......................................................... 11070101 44 Primary Contact Recreation 

Van Horn Creek ............................................................. 11070101 46 Primary Contact Recreation 

Verdigris River, Bernard Branch .................................... 11070101 16 Primary Contact Recreation 

Verdigris River, North Branch ........................................ 11070101 13 Primary Contact Recreation 

Verdigris River, North Branch ........................................ 11070101 15 Primary Contact Recreation 

Walnut Creek ................................................................. 11070101 19 Primary Contact Recreation 

West Creek .................................................................... 11070101 17 Primary Contact Recreation 

Wolf Creek ..................................................................... 11070101 41 Primary Contact Recreation 

Subbasin: Fall 

Battle Creek ................................................................... 11070102 18 Primary Contact Recreation 

Burnt Creek .................................................................... 11070102 24 Primary Contact Recreation 

Clear Creek .................................................................... 11070102 37 Primary Contact Recreation 

Coon Creek .................................................................... 11070102 25 Primary Contact Recreation 

Coon Creek .................................................................... 11070102 36 Primary Contact Recreation 

Crain Creek .................................................................... 11070102 32 Primary Contact Recreation 

Honey Creek .................................................................. 11070102 26 Primary Contact Recreation 

Indian Creek ................................................................... 11070102 15 Primary Contact Recreation 

Ivanpah Creek ................................................................ 11070102 19 Primary Contact Recreation 

Kitty Creek ...................................................................... 11070102 27 Primary Contact Recreation 

Little Indian Creek .......................................................... 11070102 34 Primary Contact Recreation 

Little Salt Creek .............................................................. 11070102 35 Primary Contact Recreation 

Oleson Creek ................................................................. 11070102 21 Primary Contact Recreation 

Otis Creek ...................................................................... 11070102 20 Primary Contact Recreation 

Plum Creek .................................................................... 11070102 30 Primary Contact Recreation 

Rainbow Creek, East ..................................................... 11070102 17 Primary Contact Recreation 

Salt Creek ...................................................................... 11070102 14 Primary Contact Recreation 

Salt Creek ...................................................................... 11070102 38 Primary Contact Recreation 

Silver Creek .................................................................... 11070102 33 Primary Contact Recreation 

Snake Creek .................................................................. 11070102 31 Primary Contact Recreation 

Spring Creek .................................................................. 11070102 12 Primary Contact Recreation 

Swing Creek ................................................................... 11070102 989 Primary Contact Recreation 

Tadpole Creek ................................................................ 11070102 29 Primary Contact Recreation 

Watson Branch ............................................................... 11070102 23 Primary Contact Recreation 

Subbasin: Middle Verdigris 

Big Creek ....................................................................... 11070103 21 Primary Contact Recreation 

Biscuit Creek .................................................................. 11070103 53 Primary Contact Recreation 

Bluff Run ........................................................................ 11070103 54 Primary Contact Recreation 

Choteau Creek ............................................................... 11070103 63 Primary Contact Recreation 

Claymore Creek ............................................................. 11070103 50 Primary Contact Recreation 

Deadman Creek ............................................................. 11070103 57 Primary Contact Recreation 

Deer Creek ..................................................................... 11070103 51 Primary Contact Recreation 

Drum Creek .................................................................... 11070103 34 Primary Contact Recreation 

Dry Creek ....................................................................... 11070103 37 Primary Contact Recreation 

Fawn Creek .................................................................... 11070103 56 Primary Contact Recreation 

Mud Creek ...................................................................... 11070103 59 Primary Contact Recreation 

Onion Creek ................................................................... 11070103 39 Primary Contact Recreation 

Potato Creek .................................................................. 11070103 31 Primary Contact Recreation 

Prior Creek ..................................................................... 11070103 62 Primary Contact Recreation 

Pumpkin Creek ............................................................... 11070103 28 Primary Contact Recreation 

Richland Creek ............................................................... 11070103 49 Primary Contact Recreation 

Rock Creek .................................................................... 11070103 58 Primary Contact Recreation 

Rock Creek .................................................................... 11070103 61 Primary Contact Recreation 

Snow Creek .................................................................... 11070103 25 Primary Contact Recreation 

Spring Creek .................................................................. 11070103 55 Primary Contact Recreation 

Sycamore Creek ............................................................ 11070103 52 Primary Contact Recreation 

Wildcat Creek ................................................................. 11070103 60 Primary Contact Recreation 

Subbasin: Elk 

Bachelor Creek .............................................................. 11070104 25 Primary Contact Recreation 

Bloody Run ..................................................................... 11070104 26 Primary Contact Recreation 

Bull Creek ....................................................................... 11070104 33 Primary Contact Recreation 

Card Creek ..................................................................... 11070104 19 Primary Contact Recreation 

Chetopa Creek ............................................................... 11070104 18 Primary Contact Recreation 

Clear Creek .................................................................... 11070104 30 Primary Contact Recreation 

Clear Creek .................................................................... 11070104 32 Primary Contact Recreation 

Coffey Branch ................................................................ 11070104 20 Primary Contact Recreation 

Duck Creek .................................................................... 11070104 3 Primary Contact Recreation 

Elk River, Mound Branch ............................................... 11070104 15 Primary Contact Recreation 

Elk River, South Branch ................................................. 11070104 38 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
439 

Environmental Protection Agency § 131.34 

Stream segment name HUC8 Segment # Designated use 

Elk River, Rowe Branch ................................................. 11070104 39 Primary Contact Recreation 

Elm Branch ..................................................................... 11070104 23 Primary Contact Recreation 

Hickory Creek ................................................................. 11070104 28 Primary Contact Recreation 

Hitchen Creek ................................................................ 11070104 7 Primary Contact Recreation 

Hitchen Creek, East ....................................................... 11070104 35 Primary Contact Recreation 

Little Duck Creek ............................................................ 11070104 24 Primary Contact Recreation 

Little Hitchen Creek ........................................................ 11070104 37 Primary Contact Recreation 

Painterhood Creek ......................................................... 11070104 5 Primary Contact Recreation 

Painterhood Creek, East ................................................ 11070104 36 Primary Contact Recreation 

Pan Creek ...................................................................... 11070104 27 Primary Contact Recreation 

Pawpaw Creek ............................................................... 11070104 11 Primary Contact Recreation 

Racket Creek ................................................................. 11070104 21 Primary Contact Recreation 

Rock Creek .................................................................... 11070104 13 Primary Contact Recreation 

Salt Creek ...................................................................... 11070104 17 Primary Contact Recreation 

Salt Creek, South ........................................................... 11070104 29 Primary Contact Recreation 

Skull Creek ..................................................................... 11070104 31 Primary Contact Recreation 

Snake Creek .................................................................. 11070104 34 Primary Contact Recreation 

Sycamore Creek ............................................................ 11070104 22 Primary Contact Recreation 

Wildcat Creek ................................................................. 11070104 16 Primary Contact Recreation 

Subbasin: Caney 

Bachelor Creek .............................................................. 11070106 47 Primary Contact Recreation 

Bee Creek ...................................................................... 11070106 9 Primary Contact Recreation 

California Creek ............................................................. 11070106 48 Primary Contact Recreation 

Caney Creek .................................................................. 11070106 12 Primary Contact Recreation 

Caney River, East Fork .................................................. 11070106 52 Primary Contact Recreation 

Caney Creek, North ....................................................... 11070106 11 Primary Contact Recreation 

Cedar Creek ................................................................... 11070106 30 Primary Contact Recreation 

Cedar Creek ................................................................... 11070106 32 Primary Contact Recreation 

Cheyenne Creek ............................................................ 11070106 40 Primary Contact Recreation 

Coon Creek .................................................................... 11070106 36 Primary Contact Recreation 

Corum Creek .................................................................. 11070106 51 Primary Contact Recreation 

Cotton Creek .................................................................. 11070106 38 Primary Contact Recreation 

Cotton Creek, North Fork ............................................... 11070106 37 Primary Contact Recreation 

Dry Creek ....................................................................... 11070106 29 Primary Contact Recreation 

Fly Creek ........................................................................ 11070106 46 Primary Contact Recreation 

Illinois Creek ................................................................... 11070106 39 Primary Contact Recreation 

Jim Creek ....................................................................... 11070106 49 Primary Contact Recreation 

Lake Creek ..................................................................... 11070106 34 Primary Contact Recreation 

Otter Creek ..................................................................... 11070106 33 Primary Contact Recreation 

Pool Creek ..................................................................... 11070106 43 Primary Contact Recreation 

Possum Trot Creek ........................................................ 11070106 74 Primary Contact Recreation 

Rock Creek .................................................................... 11070106 28 Primary Contact Recreation 

Spring Creek .................................................................. 11070106 44 Primary Contact Recreation 

Spring Creek .................................................................. 11070106 53 Primary Contact Recreation 

Squaw Creek .................................................................. 11070106 42 Primary Contact Recreation 

Sycamore Creek ............................................................ 11070106 31 Primary Contact Recreation 

Turkey Creek .................................................................. 11070106 45 Primary Contact Recreation 

Union Creek ................................................................... 11070106 41 Primary Contact Recreation 

Wolf Creek ..................................................................... 11070106 35 Primary Contact Recreation 

Wolf Creek ..................................................................... 11070106 50 Primary Contact Recreation 

Basin: Walnut 

Subbasin: Upper Walnut River 

Badger Creek ................................................................. 11030017 36 Primary Contact Recreation 

Bemis Creek ................................................................... 11030017 8 Primary Contact Recreation 

Cole Creek ..................................................................... 11030017 15 Primary Contact Recreation 

Constant Creek .............................................................. 11030017 41 Primary Contact Recreation 

Dry Creek ....................................................................... 11030017 27 Primary Contact Recreation 

Dry Creek ....................................................................... 11030017 32 Primary Contact Recreation 

Durechen Creek ............................................................. 11030017 12 Primary Contact Recreation 

Elm Creek ...................................................................... 11030017 43 Primary Contact Recreation 

Fourmile Creek ............................................................... 11030017 20 Primary Contact Recreation 

Gilmore Branch .............................................................. 11030017 39 Primary Contact Recreation 

Gypsum Creek ............................................................... 11030017 30 Primary Contact Recreation 

Henry Creek ................................................................... 11030017 33 Primary Contact Recreation 

Lower Branch ................................................................. 11030017 42 Primary Contact Recreation 

Prairie Creek .................................................................. 11030017 35 Primary Contact Recreation 

Rock Creek .................................................................... 11030017 37 Primary Contact Recreation 

Sand Creek .................................................................... 11030017 29 Primary Contact Recreation 

Satchel Creek ................................................................. 11030017 10 Primary Contact Recreation 

School Branch ................................................................ 11030017 45 Primary Contact Recreation 


rmajette on PRODPC74 with CFR
440 

§ 131.34 40 CFR Ch. I (7–1–08 Edition) 

Stream segment name HUC8 Segment # Designated use 

Sutton Creek .................................................................. 11030017 40 Primary Contact Recreation 

Walnut Creek ................................................................. 11030017 44 Primary Contact Recreation 

Whitewater Creek ........................................................... 11030017 34 Primary Contact Recreation 

Whitewater Creek, East Branch ..................................... 11030017 31 Primary Contact Recreation 

Whitewater River, East Branch ...................................... 11030017 22 Primary Contact Recreation 

Whitewater River, West Branch ..................................... 11030017 24 Primary Contact Recreation 

Whitewater River, West Branch ..................................... 11030017 25 Primary Contact Recreation 

Wildcat Creek ................................................................. 11030017 26 Primary Contact Recreation 

Wildcat Creek, West ...................................................... 11030017 28 Primary Contact Recreation 

Subbasin: Lower Walnut River 

Black Crook Creek ......................................................... 11030018 18 Primary Contact Recreation 

Cedar Creek ................................................................... 11030018 19 Secondary Contact Recreation 

Chigger Creek ................................................................ 11030018 21 Primary Contact Recreation 

Crooked Creek ............................................................... 11030018 31 Primary Contact Recreation 

Durham Creek ................................................................ 11030018 23 Primary Contact Recreation 

Dutch Creek ................................................................... 11030018 2 Primary Contact Recreation 

Dutch Creek ................................................................... 11030018 4 Primary Contact Recreation 

Eightmile Creek .............................................................. 11030018 30 Primary Contact Recreation 

Foos Creek ..................................................................... 11030018 26 Primary Contact Recreation 

Hickory Creek ................................................................. 11030018 12 Primary Contact Recreation 

Honey Creek .................................................................. 11030018 33 Primary Contact Recreation 

Little Dutch Creek .......................................................... 11030018 27 Primary Contact Recreation 

Lower Dutch Creek ........................................................ 11030018 20 Primary Contact Recreation 

Plum Creek .................................................................... 11030018 36 Primary Contact Recreation 

Polecat Creek ................................................................. 11030018 17 Primary Contact Recreation 

Posey Creek ................................................................... 11030018 37 Primary Contact Recreation 

Richland Creek ............................................................... 11030018 25 Primary Contact Recreation 

Rock Creek, North Branch ............................................. 11030018 35 Primary Contact Recreation 

Sanford Creek ................................................................ 11030018 29 Primary Contact Recreation 

Spring Branch ................................................................ 11030018 32 Primary Contact Recreation 

Stalter Branch ................................................................ 11030018 24 Primary Contact Recreation 

Stewart Creek ................................................................ 11030018 28 Primary Contact Recreation 

Swisher Branch .............................................................. 11030018 22 Primary Contact Recreation 

Total = 1186 

Lake name County Designated use 

Basin: Cimarron 

Subbasin: Upper Cimarron (HUC 11040002) 

Moss Lake East .......................................... MORTON ................................................... Primary Contact Recreation 

Moss Lake West ......................................... MORTON ................................................... Primary Contact Recreation 

Subbasin: North Fork Cimarron (HUC 11040006) 

Russell Lake ............................................... STEVENS .................................................. Primary Contact Recreation 

Subbasin: Upper Cimarron-Bluff (HUC 11040008) 

Clark State Fishing Lake ............................ CLARK ....................................................... Primary Contact Recreation 

Saint Jacob’s Well ...................................... CLARK ....................................................... Primary Contact Recreation 

Basin: Kansas/Lower Republican 

Subbasin: Middle Republican (HUC 10250016) 

Lake Jewell ................................................. JEWELL ..................................................... Primary Contact Recreation 

Subbasin: Lower Republican (HUC 10250017) 

Belleville City Lake ..................................... REPUBLIC ................................................. Primary Contact Recreation 

Wakefield Lake ........................................... CLAY .......................................................... Primary Contact Recreation 

Subbasin: Middle Kansas (HUC 10270102) 

Alma City Reservoir .................................... WABAUNSEE ............................................ Primary Contact Recreation 

Cedar Crest Pond ....................................... SHAWNEE ................................................. Primary Contact Recreation 

Central Park Lake ....................................... SHAWNEE ................................................. Primary Contact Recreation 

Gage Park Lake ......................................... SHAWNEE ................................................. Primary Contact Recreation 

Jeffrey Energy Center Lakes ...................... POTTAWATOMIE ...................................... Primary Contact Recreation 


rmajette on PRODPC74 with CFR
441 

Environmental Protection Agency § 131.34 

Lake name County Designated use 

Subbasin: Delaware (HUC 10270103) 

Atchison County Park Lake ........................ ATCHISON ................................................ Primary Contact Recreation 

Little Lake ................................................... BROWN ..................................................... Primary Contact Recreation 

Subbasin: Lower Kansas (HUC 10270104) 

Douglas County State Lake ....................... DOUGLAS ................................................. Primary Contact Recreation 

Lenexa Lake ............................................... JOHNSON ................................................. Primary Contact Recreation 

Mahaffie Farmstead Pond .......................... JOHNSON ................................................. Primary Contact Recreation 

Pierson Park Lake ...................................... WYANDOTTE ............................................ Primary Contact Recreation 

Waterworks Lakes ...................................... JOHNSON ................................................. Primary Contact Recreation 

Subbasin: Lower Big Blue (HUC 10270205) 

Lake Idlewild ............................................... MARSHALL ................................................ Primary Contact Recreation 

Subbasin: Lower Little Blue (HUC 10270207) 

Washington County State Fishing Lake ..... WASHINGTON .......................................... Primary Contact Recreation 

Basin: Lower Arkansas 

Subbasin: Rattlesnake (HUC 11030009) 

Kiowa County State Fishing Lake .............. KIOWA ....................................................... Primary Contact Recreation 

Subbasin: Cow (HUC 11030011) 

Barton Lake ................................................ BARTON .................................................... Primary Contact Recreation 

Sterling City Lake ....................................... RICE .......................................................... Primary Contact Recreation 

Subbasin: Little Arkansas (HUC 11030012) 

Dillon Park Lakes #1 .................................. RENO ......................................................... Primary Contact Recreation 

Dillon Park Lake #2 .................................... RENO ......................................................... Primary Contact Recreation 

Newton City Park Lake ............................... HARVEY .................................................... Primary Contact Recreation 

Subbasin: Middle Arkansas-Slate (HUC 11030013) 

Belaire Lake ................................................ SEDGWICK ............................................... Primary Contact Recreation 

Buffalo Park Lake ....................................... SEDGWICK ............................................... Primary Contact Recreation 

Emery Park ................................................. SEDGWICK ............................................... Primary Contact Recreation 

Harrison Park Lake ..................................... SEDGWICK ............................................... Primary Contact Recreation 

Riggs Park Lake ......................................... SEDGWICK ............................................... Primary Contact Recreation 

Subbasin: South Fork Ninnescah (HUC 11030015) 

Lemon Park Lake ....................................... PRATT ....................................................... Primary Contact Recreation 

Subbasin: Medicine Lodge (HUC 11060003) 

Barber County State Fishing Lake ............. BARBER .................................................... Primary Contact Recreation 

Subbasin: Lower Salt Fork Arkansas (HUC 11060004) 

Hargis Lake ................................................ BARBER .................................................... Primary Contact Recreation 

Basin: Marais Des Cygnes 

Subbasin: Upper Marais Des Cygnes (HUC 10290101) 

Allen City Lake ........................................... LYON ......................................................... Primary Contact Recreation 

Cedar Creek Lake ...................................... ANDERSON ............................................... Primary Contact Recreation 

Crystal Lake ................................................ ANDERSON ............................................... Primary Contact Recreation 

Lyon County State Fishing Lake ................ LYON ......................................................... Primary Contact Recreation 

Osage City Reservoir ................................. OSAGE ...................................................... Primary Contact Recreation 

Waterworks Impoundment .......................... ANDERSON ............................................... Primary Contact Recreation 

Subbasin: Lower Marais Des Cygnes (HUC 10290102) 

Edgerton City Lake ..................................... JOHNSON ................................................. Primary Contact Recreation 

Edgerton South Lake .................................. JOHNSON ................................................. Primary Contact Recreation 

Lake LaCygne ............................................ LINN ........................................................... Primary Contact Recreation 

Louisburg State Fishing Lake ..................... MIAMI ......................................................... Primary Contact Recreation 

Miami County State Fishing Lake .............. MIAMI ......................................................... Primary Contact Recreation 

Paola City Lake .......................................... MIAMI ......................................................... Primary Contact Recreation 


rmajette on PRODPC74 with CFR
442 

§ 131.34 40 CFR Ch. I (7–1–08 Edition) 

Lake name County Designated use 

Pleasanton Lake #1 .................................... LINN ........................................................... Primary Contact Recreation 

Pleasanton Lake #2 .................................... LINN ........................................................... Primary Contact Recreation 

Spring Hill City Lake ................................... JOHNSON ................................................. Primary Contact Recreation 

Subbasin: Marmaton (HUC 10290104) 

Gunn Park Lake, East ................................ BOURBON ................................................. Primary Contact Recreation 

Gunn Park Lake, West ............................... BOURBON ................................................. Primary Contact Recreation 

Rock Creek Lake ........................................ BOURBON ................................................. Primary Contact Recreation 

Basin: Missouri 

Subbasin: South Fork Big Nemaha (HUC 10240007) 

Pony Creek Lake ........................................ NEMAHA .................................................... Primary Contact Recreation 

Sabetha City Lake ...................................... NEMAHA .................................................... Primary Contact Recreation 

Subbasin: Independence-Sugar (HUC 10240011) 

Atchison City Lakes .................................... ATCHISON ................................................ Primary Contact Recreation 

Big Eleven Lake ......................................... WYANDOTTE ............................................ Primary Contact Recreation 

Doniphan Fair Association Lake ................ DONIPHAN ................................................ Primary Contact Recreation 

Jerrys Lake ................................................. LEAVENWORTH ....................................... Primary Contact Recreation 

Lansing City Lake ....................................... LEAVENWORTH ....................................... Primary Contact Recreation 

South Park Lake ......................................... LEAVENWORTH ....................................... Primary Contact Recreation 

Subbasin: Lower Missouri-Crooked (HUC 10300101) 

Prairie View Park ........................................ JOHNSON ................................................. Primary Contact Recreation 

South Park Lake ......................................... JOHNSON ................................................. Primary Contact Recreation 

Stanley Rural Water District Lake #2 ......... JOHNSON ................................................. Primary Contact Recreation

Stohl Park Lake .......................................... JOHNSON ................................................. Primary Contact Recreation 

Basin: Neosho 

Subbasin: Lower Cottonwood (HUC 11070203) 

Peter Pan Pond .......................................... LYON ......................................................... Primary Contact Recreation 

Subbasin: Upper Neosho (HUC 11070204) 

Chanute City (Santa Fe) Lake ................... NEOSHO ................................................... Primary Contact Recreation 

Leonard’s Lake ........................................... WOODSON ................................................ Primary Contact Recreation 

Subbasin: Middle Neosho (HUC 11070205) 

Altamont City Lake #1 ................................ LABETTE ................................................... Primary Contact Recreation 

Bartlett City Lake ........................................ LABETTE ................................................... Primary Contact Recreation 

Harmon Wildlife Area Lakes ....................... LABETTE ................................................... Primary Contact Recreation 

Mined Land Wildlife Area Lakes ................ CHEROKEE ............................................... Primary Contact Recreation

Timber Lake ................................................ NEOSHO ................................................... Primary Contact Recreation 

Subbasin: Spring (HUC 11070207) 

Empire Lake ................................................ CHEROKEE ............................................... Primary Contact Recreation 

Frontenac City Park .................................... CRAWFORD .............................................. Primary Contact Recreation 

Mined Land Wildlife Area Lakes ................ CRAWFORD .............................................. Primary Contact Recreation 

Pittsburg College Lake ............................... CRAWFORD .............................................. Primary Contact Recreation 

Playters Lake .............................................. CRAWFORD .............................................. Primary Contact Recreation 

Basin: Smoky Hill/Saline 

Subbasin: Lower Smoky Hill (HUC 10260008) 

Herington City Park Lake ........................... DICKINSON ............................................... Primary Contact Recreation 

Herington Reservoir .................................... DICKINSON ............................................... Primary Contact Recreation 

Basin: Solomon 

Subbasin: Lower North Fork Solomon (HUC 10260012) 

Francis Wachs Wildlife Area Lakes ............ SMITH ........................................................ Primary Contact Recreation 

Subbasin: Solomon River (HUC 10260015) 

Jewell County State Fishing Lake .............. JEWELL ..................................................... Primary Contact Recreation 

Ottawa County State Fishing Lake ............ OTTAWA .................................................... Primary Contact Recreation 


rmajette on PRODPC74 with CFR
443 

Environmental Protection Agency § 131.34 

Lake name County Designated use 

Basin: Upper Arkansas 

Subbasin: Middle Arkansas-Lake McKinney (HUC 11030001) 

Lake McKinney ........................................... KEARNY .................................................... Primary Contact Recreation 

Subbasin: Arkansas-Dodge City (HUC 11030003) 

Lake Charles .............................................. FORD ......................................................... Primary Contact Recreation 

Subbasin: Pawnee (HUC 11030005) 

Concannon State Fishing Lake .................. FINNEY ...................................................... Primary Contact Recreation 

Finney County Game Refuge Lakes .......... FINNEY ...................................................... Primary Contact Recreation

Subbasin: Buckner (HUC 11030006) 

Ford County Lake ....................................... FORD ......................................................... Primary Contact Recreation 

Hain State Fishing Lake ............................. FORD ......................................................... Primary Contact Recreation 

Subbasin: Upper Walnut Creek (HUC 11030007) 

Goodman State Fishing Lake ..................... NESS ......................................................... Primary Contact Recreation 

Subbasin: Lower Walnut Creek (HUC 11030008) 

Memorial Park Lake .................................... BARTON .................................................... Primary Contact Recreation 

Stone Lake ................................................. BARTON .................................................... Primary Contact Recreation 

Basin: Verdigris 

Subbasin: Upper Verdigris (HUC 11070101) 

Quarry Lake ................................................ WILSON ..................................................... Primary Contact Recreation 

Thayer New City Lake ................................ NEOSHO ................................................... Primary Contact Recreation 

Subbasin: Middle Verdigris (HUC 11070103) 

La Claire Lake ............................................ MONTGOMERY ........................................ Primary Contact Recreation 

Pfister Park Lakes ...................................... MONTGOMERY ........................................ Primary Contact Recreation 

Subbasin: Caney (HUC 11070106) 

Caney City Lake ......................................... CHAUTAUQUA .......................................... Primary Contact Recreation 

Basin: Walnut 

Subbasin: Lower Walnut River (HUC 11030018) 

Butler County State Fishing Lake .............. BUTLER ..................................................... Primary Contact Recreation 

Winfield Park Lagoon ................................. COWLEY ................................................... Primary Contact Recreation 

Total = 100 

(c) Water quality standard variances. 

(1) The Regional Administrator, EPA 

Region 7, is authorized to grant 

variances from the water quality 

standards in paragraphs (a) and (b) of 

this section where the requirements of 

this paragraph (c) are met. A water 

quality standard variance applies only 

to the permittee requesting the variance and only to the pollutant or pollutants specified in the variance; the 

underlying water quality standard otherwise remains in effect. 

(2) A water quality standard variance 

shall not be granted if: 

(i) Standards will be attained by implementing effluent limitations required under sections 301(b) and 306 of 

the CWA and by the permittee implementing reasonable best management 

practices for nonpoint source control; 

or 

(ii) The variance would likely jeopardize the continued existence of any 

threatened or endangered species listed 

under section 4 of the Endangered Species Act or result in the destruction or 

adverse modification of such species’

critical habitat. 


rmajette on PRODPC74 with CFR
444 

§ 131.35 40 CFR Ch. I (7–1–08 Edition) 

(3) Subject to paragraph (c)(2) of this 

section, a water quality standards variance may be granted if the applicant 

demonstrates to EPA that attaining 

the water quality standard is not feasible because: 

(i) Naturally occurring pollutant concentrations prevent the attainment of 

the use; or 

(ii) Natural, ephemeral, intermittent 

or low flow conditions or water levels 

prevent the attainment of the use, unless these conditions may be compensated for by the discharge of sufficient volume of effluent discharges 

without violating State water conservation requirements to enable uses 

to be met; or 

(iii) Human caused conditions or 

sources of pollution prevent the attainment of the use and cannot be remedied or would cause more environmental damage to correct than to leave 

in place; or 

(iv) Dams, diversions or other types 

of hydrologic modifications preclude 

the attainment of the use, and it is not 

feasible to restore the water body to its 

original condition or to operate such 

modification in a way which would result in the attainment of the use; or 

(v) Physical conditions related to the 

natural features of the water body, 

such as the lack of a proper substrate, 

cover, flow, depth, pools, riffles, and 

the like unrelated to water quality, 

preclude attainment of aquatic life 

protection uses; or 

(vi) Controls more stringent than 

those required by sections 301(b) and 

306 of the CWA would result in substantial and widespread economic and social impact. 

(4) Procedures. An applicant for a 

water quality standards variance shall 

submit a request to the Regional Administrator of EPA Region 7. The application shall include all relevant information showing that the requirements for a variance have been satisfied. The burden is on the applicant to 

demonstrate to EPA’s satisfaction that 

the designated use is unattainable for 

one of the reasons specified in paragraph (c)(3) of this section. If the Regional Administrator preliminarily determines that grounds exist for granting a variance, he shall provide public 

notice of the proposed variance and 

provide an opportunity for public comment. Any activities required as a condition of the Regional Administrator’s 

granting of a variance shall be included 

as conditions of the NPDES permit for 

the applicant. These terms and conditions shall be incorporated into the applicant’s NPDES permit through the 

permit reissuance process or through a 

modification of the permit pursuant to 

the applicable permit modification provisions of Kansas’ NPDES program 

(5) A variance may not exceed 3 years 

or the term of the NPDES permit, 

whichever is less. A variance may be 

renewed if the applicant reapplies and 

demonstrates that the use in question 

is still not attainable. Renewal of the 

variance may be denied if the applicant 

did not comply with the conditions of 

the original variance, or otherwise does 

not meet the requirements of this section. 

[68 FR 40442, July 7, 2003] 

§ 131.35 Colville Confederated Tribes 

Indian Reservation. 

The water quality standards applicable to the waters within the Colville 

Indian Reservation, located in the 

State of Washington. 

(a) Background. (1) It is the purpose 

of these Federal water quality standards to prescribe minimum water quality requirements for the surface waters 

located within the exterior boundaries 

of the Colville Indian Reservation to 

ensure compliance with section 303(c) 

of the Clean Water Act. 

(2) The Colville Confederated Tribes 

have a primary interest in the protection, control, conservation, and utilization of the water resources of the 

Colville Indian Reservation. Water 

quality standards have been enacted 

into tribal law by the Colville Business 

Council of the Confederated Tribes of 

the Colville Reservation, as the 

Colville Water Quality Standards Act, 

CTC Title 33 (Resolution No. 1984–526 

(August 6, 1984) as amended by Resolution No. 1985–20 (January 18, 1985)). 

(b) Territory covered. The provisions of 

these water quality standards shall 

apply to all surface waters within the 

exterior boundaries of the Colville Indian Reservation. 

(c) Applicability, Administration and 

Amendment. (1) The water quality 


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Environmental Protection Agency § 131.35 

standards in this section shall be used 

by the Regional Administrator for establishing any water quality based National Pollutant Discharge Elimination 

System Permit (NPDES) for point 

sources on the Colville Confederated 

Tribes Reservation. 

(2) In conjunction with the issuance 

of section 402 or section 404 permits, 

the Regional Administrator may designate mixing zones in the waters of 

the United States on the reservation 

on a case-by-case basis. The size of 

such mixing zones and the in-zone 

water quality in such mixing zones 

shall be consistent with the applicable 

procedures and guidelines in EPA’s 

Water Quality Standards Handbook 

and the Technical Support Document 

for Water Quality Based Toxics Control. 

(3) Amendments to the section at the 

request of the Tribe shall proceed in 

the following manner. 

(i) The requested amendment shall 

first be duly approved by the Confederated Tribes of the Colville Reservation (and so certified by the Tribes 

Legal Counsel) and submitted to the 

Regional Administrator. 

(ii) The requested amendment shall 

be reviewed by EPA (and by the State 

of Washington, if the action would affect a boundary water). 

(iii) If deemed in compliance with the 

Clean Water Act, EPA will propose and 

promulgate an appropriate change to 

this section. 

(4) Amendment of this section at 

EPA’s initiative will follow consultation with the Tribe and other appropriate entities. Such amendments will 

then follow normal EPA rulemaking 

procedures. 

(5) All other applicable provisions of 

this part 131 shall apply on the Colville 

Confederated Tribes Reservation. Special attention should be paid to §§ 131.6, 

131.10, 131.11 and 131.20 for any amendment to these standards to be initiated 

by the Tribe. 

(6) All numeric criteria contained in 

this section apply at all in-stream flow 

rates greater than or equal to the flow 

rate calculated as the minimum 7-consecutive day average flow with a recurrence frequency of once in ten years 

(7Q10); narrative criteria (§ 131.35(e)(3)) 

apply regardless of flow. The 7Q10 low 

flow shall be calculated using methods 

recommended by the U.S. Geological 

Survey. 

(d) Definitions. (1) Acute toxicity 

means a deleterious response (e.g., 

mortality, disorientation, immobilization) to a stimulus observed in 96 hours 

or less. 

(2) Background conditions means the 

biological, chemical, and physical conditions of a water body, upstream from 

the point or non-point source discharge 

under consideration. Background sampling location in an enforcement action will be upstream from the point of 

discharge, but not upstream from other 

inflows. If several discharges to any 

water body exist, and an enforcement 

action is being taken for possible violations to the standards, background 

sampling will be undertaken immediately upstream from each discharge. 

(3) Ceremonial and Religious water use 

means activities involving traditional 

Native American spiritual practices 

which involve, among other things, primary (direct) contact with water. 

(4) Chronic toxicity means the lowest 

concentration of a constituent causing 

observable effects (i.e., considering 

lethality, growth, reduced reproduction, etc.) over a relatively long period 

of time, usually a 28-day test period for 

small fish test species. 

(5) Council or Tribal Council means 

the Colville Business Council of the 

Colville Confederated Tribes. 

(6) Geometric mean means the nth root 

of a product of n factors. 

(7) Mean retention time means the 

time obtained by dividing a reservoir’s 

mean annual minimum total storage 

by the non-zero 30-day, ten-year lowflow from the reservoir. 

(8) Mixing zone or dilution zone means 

a limited area or volume of water 

where initial dilution of a discharge 

takes place; and where numeric water 

quality criteria can be exceeded but 

acutely toxic conditions are prevented 

from occurring. 

(9) pH means the negative logarithm 

of the hydrogen ion concentration. 

(10) Primary contact recreation means 

activities where a person would have 

direct contact with water to the point 

of complete submergence, including 

but not limited to skin diving, swimming, and water skiing. 


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(11) Regional Administrator means the 

Administrator of EPA’s Region X. 

(12) Reservation means all land within 

the limits of the Colville Indian Reservation, established on July 2, 1872 by 

Executive Order, presently containing 

1,389,000 acres more or less, and under 

the jurisdiction of the United States 

government, notwithstanding the 

issuance of any patent, and including 

rights-of-way running through the reservation. 

(13) Secondary contact recreation 

means activities where a person’s 

water contact would be limited to the 

extent that bacterial infections of eyes, 

ears, respiratory, or digestive systems 

or urogenital areas would normally be 

avoided (such as wading or fishing). 

(14) Surface water means all water 

above the surface of the ground within 

the exterior boundaries of the Colville 

Indian Reservation including but not 

limited to lakes, ponds, reservoirs, artificial impoundments, streams, rivers, 

springs, seeps and wetlands. 

(15) Temperature means water temperature expressed in Centigrade degrees (C). 

(16) Total dissolved solids (TDS) means 

the total filterable residue that passes 

through a standard glass fiber filter 

disk and remains after evaporation and 

drying to a constant weight at 180 degrees C. it is considered to be a measure of the dissolved salt content of the 

water. 

(17) Toxicity means acute and/or 

chronic toxicity. 

(18) Tribe or Tribes means the Colville 

Confederated Tribes. 

(19) Turbidity means the clarity of 

water expressed as nephelometric turbidity units (NTU) and measured with 

a calibrated turbidimeter. 

(20) Wildlife habitat means the waters 

and surrounding land areas of the Reservation used by fish, other aquatic life 

and wildlife at any stage of their life 

history or activity. 

(e) General considerations. The following general guidelines shall apply 

to the water quality standards and 

classifications set forth in the use designation Sections. 

(1) Classification boundaries. At the 

boundary between waters of different 

classifications, the water quality 

standards for the higher classification 

shall prevail. 

(2) Antidegradation policy. This 

antidegradation policy shall be applicable to all surface waters of the Reservation. 

(i) Existing in-stream water uses and 

the level of water quality necessary to 

protect the existing uses shall be maintained and protected. 

(ii) Where the quality of the waters 

exceeds levels necessary to support 

propagation of fish, shellfish, and wildlife and recreation in and on the water, 

that quality shall be maintained and 

protected unless the Regional Administrator finds, after full satisfaction of 

the inter-governmental coordination 

and public participation provisions of 

the Tribes’ continuing planning process, that allowing lower water quality 

is necessary to accommodate important economic or social development in 

the area in which the waters are located. In allowing such degradation or 

lower water quality, the Regional Administrator shall assure water quality 

adequate to protect existing uses fully. 

Further, the Regional Administrator 

shall assure that there shall be 

achieved the highest statutory and regulatory requirements for all new and 

existing point sources and all cost-effective and reasonable best management practices for nonpoint source 

control. 

(iii) Where high quality waters are 

identified as constituting an outstanding national or reservation resource, such as waters within areas 

designated as unique water quality 

management areas and waters otherwise of exceptional recreational or ecological significance, and are designated 

as special resource waters, that water 

quality shall be maintained and protected. 

(iv) In those cases where potential 

water quality impairment associated 

with a thermal discharge is involved, 

this antidegradation policy’s implementing method shall be consistent 

with section 316 of the Clean Water 

Act. 

(3) Aesthetic qualities. All waters within the Reservation, including those 

within mixing zones, shall be free from 

substances, attributable to wastewater 


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Environmental Protection Agency § 131.35 

discharges or other pollutant sources, 

that: 

(i) Settle to form objectionable deposits; 

(ii) Float as debris, scum, oil, or 

other matter forming nuisances; 

(iii) Produce objectionable color, 

odor, taste, or turbidity; 

(iv) Cause injury to, are toxic to, or 

produce adverse physiological responses in humans, animals, or plants; 

or 

(v) produce undesirable or nuisance 

aquatic life. 

(4) Analytical methods. (i) The analytical testing methods used to measure 

or otherwise evaluate compliance with 

water quality standards shall to the extent practicable, be in accordance with 

the ‘‘Guidelines Establishing Test Procedures for the Analysis of Pollutants’’

(40 CFR part 136). When a testing method is not available for a particular substance, the most recent edition of 

‘‘Standard Methods for the Examination of Water and Wastewater’’ (published by the American Public Health 

Association, American Water Works 

Association, and the Water Pollution 

Control Federation) and other or superseding methods published and/or approved by EPA shall be used. 

(f) General water use and criteria classes. The following criteria shall apply to 

the various classes of surface waters on 

the Colville Indian Reservation: 

(1) Class I (Extraordinary)—(i) Designated uses. The designated uses include, but are not limited to, the following: 

(A) Water supply (domestic, industrial, agricultural). 

(B) Stock watering. 

(C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, 

spawning, and harvesting. 

(D) Wildlife habitat. 

(E) Ceremonial and religious water 

use. 

(F) Recreation (primary contact 

recreation, sport fishing, boating and 

aesthetic enjoyment). 

(G) Commerce and navigation. 

(ii) Water quality criteria. (A) Bacteriological Criteria. The geometric 

mean of the enterococci bacteria densities in samples taken over a 30 day 

period shall not exceed 8 per 100 milliliters, nor shall any single sample exceed an enterococci density of 35 per 

100 milliliters. These limits are calculated as the geometric mean of the 

collected samples approximately equally spaced over a thirty day period. 

(B) Dissolved oxygen—The dissolved 

oxygen shall exceed 9.5 mg/l. 

(C) Total dissolved gas—concentrations shall not exceed 110 percent of 

the saturation value for gases at the 

existing atmospheric and hydrostatic 

pressures at any point of sample collection. 

(D) Temperature—shall not exceed 

16.0 degrees C due to human activities. 

Temperature increases shall not, at 

any time, exceed t=23/(T+5). 

(1) When natural conditions exceed 

16.0 degrees C, no temperature increase 

will be allowed which will raise the receiving water by greater than 0.3 degrees C. 

(2) For purposes hereof, ‘‘t’’ represents the permissive temperature 

change across the dilution zone; and 

‘‘T’’ represents the highest existing 

temperature in this water classification outside of any dilution zone. 

(3) Provided that temperature increase resulting from nonpoint source 

activities shall not exceed 2.8 degrees 

C, and the maximum water temperature shall not exceed 10.3 degrees C. 

(E) pH shall be within the range of 6.5 

to 8.5 with a human-caused variation of 

less than 0.2 units. 

(F) Turbidity shall not exceed 5 NTU 

over background turbidity when the 

background turbidity is 50 NTU or less, 

or have more than a 10 percent increase 

in turbidity when the background turbidity is more than 50 NTU. 

(G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of 

public health significance, or which 

may cause acute or chronic toxic conditions to the aquatic biota, or which 

may adversely affect designated water 

uses. 

(2) Class II (Excellent)—(i) Designated 

uses. The designated uses include but 

are not limited to, the following: 

(A) Water supply (domestic, industrial, agricultural). 

(B) Stock watering. 


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§ 131.35 40 CFR Ch. I (7–1–08 Edition) 

(C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, 

spawning, and harvesting; crayfish 

rearing, spawning, and harvesting. 

(D) Wildlife habitat. 

(E) Ceremonial and religious water 

use. 

(F) Recreation (primary contact 

recreation, sport fishing, boating and 

aesthetic enjoyment). 

(G) Commerce and navigation. 

(ii) Water quality criteria. (A) Bacteriological Criteria—The geometric 

mean of the enterococci bacteria densities in samples taken over a 30 day 

period shall not exceed 16/100 ml, nor 

shall any single sample exceed an 

enterococci density of 75 per 100 milliliters. These limits are calculated as 

the geometric mean of the collected 

samples approximately equally spaced 

over a thirty day period. 

(B) Dissolved oxygen—The dissolved 

oxygen shall exceed 8.0 mg/l. 

(C) Total dissolved gas—concentrations shall not exceed 110 percent of 

the saturation value for gases at the 

existing atmospheric and hydrostatic 

pressures at any point of sample collection. 

(D) Temperature-shall not exceed 18.0 

degrees C due to human activities. 

Temperature increases shall not, at 

any time, exceed t=28/(T+7). 

(1) When natural conditions exceed 18 

degrees C no temperature increase will 

be allowed which will raise the receiving water temperature by greater than 

0.3 degrees C. 

(2) For purposes hereof, ‘‘t’’ represents the permissive temperature 

change across the dilution zone; and 

‘‘T’’ represents the highest existing 

temperature in this water classification outside of any dilution zone. 

(3) Provided that temperature increase resulting from non-point source 

activities shall not exceed 2.8 degrees 

C, and the maximum water temperature shall not exceed 18.3 degrees C. 

(E) pH shall be within the range of 6.5 

to 8.5 with a human-caused variation of 

less than 0.5 units. 

(F) Turbidity shall not exceed 5 NTU 

over background turbidity when the 

background turbidity is 50 NTU or less, 

or have more than a 10 percent increase 

in turbidity when the background turbidity is more than 50 NTU. 

(G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of 

public health significance, or which 

may cause acute or chronic toxic conditions to the aquatic biota, or which 

may adversely affect designated water 

uses. 

(3) Class III (Good)—(i) Designated 

uses. The designated uses include but 

are not limited to, the following: 

(A) Water supply (industrial, agricultural). 

(B) Stock watering. 

(C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, 

spawning, and harvesting; crayfish 

rearing, spawning, and harvesting. 

(D) Wildlife habitat. 

(E) Recreation (secondary contact 

recreation, sport fishing, boating and 

aesthetic enjoyment). 

(F) Commerce and navigation. 

(ii) Water quality criteria. (A) Bacteriological Criteria—The geometric 

mean of the enterococci bacteria densities in samples taken over a 30 day 

period shall not exceed 33/100 ml, nor 

shall any single sample exceed an 

enterococci density of 150 per 100 milliliters. These limits are calculated as 

the geometric mean of the collected 

samples approximately equally spaced 

over a thirty day period. 

(B) Dissolved oxygen. 

Early life 

stages 1,2

Other 

life 

stages 

7 day mean ........................................... 9.5 (6.5) 3 NA 

1 day minimum 4 .................................... 8.0 (5.0) 6.5 

1These are water column concentrations recommended to 

achieve the required intergravel dissolved oxygen concentrations shown in parentheses. The 3 mg/L differential is discussed in the dissolved oxygen criteria document (EPA 440/ 

5–86–003, April 1986). For species that have early life stages 

exposed directly to the water column, the figures in parentheses apply. 2 Includes all embryonic and larval stages and all juvenile 

forms to 30-days following hatching. 3 NA (not applicable) 

4All minima should be considered as instantaneous concentrations to be achieved at all times. 

(C) Total dissolved gas concentrations shall not exceed 110 percent of 

the saturation value for gases at the 

existing atmospheric and hydrostatic 

pressures at any point of sample collection. 


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Environmental Protection Agency § 131.35 

(D) Temperature shall not exceed 21.0 

degrees C due to human activities. 

Temperature increases shall not, at 

any time, exceed t=34/(T+9). 

(1) When natural conditions exceed 

21.0 degrees C no temperature increase 

will be allowed which will raise the receiving water temperature by greater 

than 0.3 degrees C. 

(2) For purposes hereof, ‘‘t’’ represents the permissive temperature 

change across the dilution zone; and 

‘‘T’’ represents the highest existing 

temperature in this water classification outside of any dilution zone. 

(3) Provided that temperature increase resulting from nonpoint source 

activities shall not exceed 2.8 degrees 

C, and the maximum water temperature shall not exceed 21.3 degrees C. 

(E) pH shall be within the range of 6.5 

to 8.5 with a human-caused variation of 

less than 0.5 units. 

(F) Turbidity shall not exceed 10 NTU 

over background turbidity when the 

background turbidity is 50 NTU or less, 

or have more than a 20 percent increase 

in turbidity when the background turbidity is more than 50 NTU. 

(G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of 

public health significance, or which 

may cause acute or chronic toxic conditions to the aquatic biota, or which 

may adversely affect designated water 

uses. 

(4) Class IV (Fair)—(i) Designated uses. 

The designated uses include but are not 

limited to, the following: 

(A) Water supply (industrial). 

(B) Stock watering. 

(C) Fish (salmonid and other fish migration). 

(D) Recreation (secondary contact 

recreation, sport fishing, boating and 

aesthetic enjoyment). 

(E) Commerce and navigation. 

(ii) Water quality criteria. (A) Dissolved oxygen. 

During periods of 

salmonid 

and other 

fish migration 

During all 

other time 

periods 

30 day mean ................................. 6.5 5.5 

7 day mean ................................... 1 NA 1 NA 

7 day mean minimum .................... 5.0 4.0 

During periods of 

salmonid 

and other 

fish migration 

During all 

other time 

periods 

1 day minimum 2 ............................ 4.0 3.0 

1 NA (not applicable). 

2All minima should be considered as instantaneous con- centrations to be achieved at all times. 

(B) Total dissolved gas—concentrations shall not exceed 110 percent of 

the saturation value for gases at the 

existing atmospheric and hydrostatic 

pressures at any point of sample collection. 

(C) Temperature shall not exceed 22.0 

degrees C due to human activities. 

Temperature increases shall not, at 

any time, exceed t=20/(T+2). 

(1) When natural conditions exceed 

22.0 degrees C, no temperature increase 

will be allowed which will raise the receiving water temperature by greater 

than 0.3 degrees C. 

(2) For purposes hereof, ‘‘t’’ represents the permissive temperature 

change across the dilution zone; and 

‘‘T’’ represents the highest existing 

temperature in this water classification outside of any dilution zone. 

(D) pH shall be within the range of 6.5 

to 9.0 with a human-caused variation of 

less than 0.5 units. 

(E) Turbidity shall not exceed 10 NTU 

over background turbidity when the 

background turbidity is 50 NTU or less, 

or have more than a 20 percent increase 

in turbidity when the background turbidity is more than 50 NTU. 

(F) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of 

public health significance, or which 

may cause acute or chronic toxic conditions to the aquatic biota, or which 

may adversely affect designated water 

uses. 

(5) Lake Class—(i) Designated uses. 

The designated uses include but are not 

limited to, the following: 

(A) Water supply (domestic, industrial, agricultural). 

(B) Stock watering. 

(C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, 

spawning, and harvesting; crayfish 

rearing, spawning, and harvesting. 

(D) Wildlife habitat. 


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(E) Ceremonial and religious water 

use. 

(F) Recreation (primary contact 

recreation, sport fishing, boating and 

aesthetic enjoyment). 

(G) Commerce and navigation. 

(ii) Water quality criteria. (A) Bacteriological Criteria. The geometric 

mean of the enterococci bacteria densities in samples taken over a 30 day 

period shall not exceed 33/100 ml, nor 

shall any single sample exceed an 

enterococci density of 150 per 100 milliliters. These limits are calculated as 

the geometric mean of the collected 

samples approximately equally spaced 

over a thirty day period. 

(B) Dissolved oxygen—no measurable 

decrease from natural conditions. 

(C) Total dissolved gas concentrations shall not exceed 110 percent of 

the saturation value for gases at the 

existing atmospheric and hydrostatic 

pressures at any point of sample collection. 

(D) Temperature—no measurable 

change from natural conditions. 

(E) pH—no measurable change from 

natural conditions. 

(F) Turbidity shall not exceed 5 NTU 

over natural conditions. 

(G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those 

which may affect public health, the 

natural aquatic environment, or the 

desirability of the water for any use. 

(6) Special Resource Water Class 

(SRW)—(i) General characteristics. These 

are fresh or saline waters which comprise a special and unique resource to 

the Reservation. Water quality of this 

class will be varied and unique as determined by the Regional Administrator in cooperation with the Tribes. 

(ii) Designated uses. The designated 

uses include, but are not limited to, 

the following: 

(A) Wildlife habitat. 

(B) Natural foodchain maintenance. 

(iii) Water quality criteria. 

(A) Enterococci bacteria densities 

shall not exceed natural conditions. 

(B) Dissolved oxygen—shall not show 

any measurable decrease from natural 

conditions. 

(C) Total dissolved gas shall not vary 

from natural conditions. 

(D) Temperature—shall not show any 

measurable change from natural conditions. 

(E) pH shall not show any measurable 

change from natural conditions. 

(F) Settleable solids shall not show 

any change from natural conditions. 

(G) Turbidity shall not exceed 5 NTU 

over natural conditions. 

(H) Toxic, radioactive, or deleterious 

material concentrations shall not exceed those found under natural conditions. 

(g) General classifications. General 

classifications applying to various surface waterbodies not specifically classified under § 131.35(h) are as follows: 

(1) All surface waters that are tributaries to Class I waters are classified 

Class I, unless otherwise classified. 

(2) Except for those specifically classified otherwise, all lakes with existing 

average concentrations less than 2000 

mg/L TDS and their feeder streams on 

the Colville Indian Reservation are 

classified as Lake Class and Class I, respectively. 

(3) All lakes on the Colville Indian 

Reservation with existing average concentrations of TDS equal to or exceeding 2000 mg/L and their feeder streams 

are classified as Lake Class and Class I 

respectively unless specifically classified otherwise. 

(4) All reservoirs with a mean detention time of greater than 15 days are 

classified Lake Class. 

(5) All reservoirs with a mean detention time of 15 days or less are classified the same as the river section in 

which they are located. 

(6) All reservoirs established on preexisting lakes are classified as Lake 

Class. 

(7) All wetlands are assigned to the 

Special Resource Water Class. 

(8) All other waters not specifically 

assigned to a classification of the reservation are classified as Class II. 

(h) Specific classifications. Specific 

classifications for surface waters of the 

Colville Indian Reservation are as follows: 

(1) Streams: 

Alice Creek ................................ Class III 

Anderson Creek ........................ Class III 

Armstrong Creek ....................... Class III 

Barnaby Creek .......................... Class II 

Bear Creek ................................ Class III 

Beaver Dam Creek .................... Class II 

Bridge Creek ............................. Class II 


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Environmental Protection Agency § 131.36 

Brush Creek .............................. Class III 

Buckhorn Creek ......................... Class III 

Cache Creek ............................. Class III 

Canteen Creek .......................... Class I 

Capoose Creek ......................... Class III 

Cobbs Creek ............................. Class III 

Columbia River from Chief Joseph Dam to Wells Dam.

Columbia River from northern 

Reservation boundary to 

Grand Coulee Dam (Roosevelt Lake).

Columbia River from Grand 

Coulee Dam to Chief Joseph 

Dam.

Cook Creek ............................... Class I 

Cooper Creek ............................ Class III 

Cornstalk Creek ......................... Class III 

Cougar Creek ............................ Class I 

Coyote Creek ............................ Class II 

Deerhorn Creek ......................... Class III 

Dick Creek ................................. Class III 

Dry Creek .................................. Class I 

Empire Creek ............................ Class III 

Faye Creek ................................ Class I 

Forty Mile Creek ........................ Class III 

Gibson Creek ............................ Class I 

Gold Creek ................................ Class II 

Granite Creek ............................ Class II 

Grizzly Creek ............................. Class III 

Haley Creek ............................... Class III 

Hall Creek .................................. Class II 

Hall Creek, West Fork ............... Class I 

Iron Creek .................................. Class III 

Jack Creek ................................ Class III 

Jerred Creek .............................. Class I 

Joe Moses Creek ...................... Class III 

John Tom Creek ........................ Class III 

Jones Creek .............................. Class I 

Kartar Creek .............................. Class III 

Kincaid Creek ............................ Class III 

King Creek ................................. Class III 

Klondyke Creek ......................... Class I 

Lime Creek ................................ Class III 

Little Jim Creek ......................... Class III 

Little Nespelem .......................... Class II 

Louie Creek ............................... Class III 

Lynx Creek ................................ Class II 

Manila Creek ............................. Class III 

McAllister Creek ........................ Class III 

Meadow Creek .......................... Class III 

Mill Creek .................................. Class II 

Mission Creek ............................ Class III 

Nespelem River ......................... Class II 

Nez Perce Creek ....................... Class III 

Nine Mile Creek ......................... Class II 

Nineteen Mile Creek .................. Class III 

No Name Creek ........................ Class II 

North Nanamkin Creek .............. Class III 

North Star Creek ....................... Class III 

Okanogan River from Reservation north boundary to Columbia River.

Class II 

Olds Creek ................................ Class I 

Omak Creek .............................. Class II 

Onion Creek .............................. Class II 

Parmenter Creek ....................... Class III 

Peel Creek ................................. Class III 

Peter Dan Creek ....................... Class III 

Rock Creek ................................ Class I 

San Poil River ........................... Class I 

Sanpoil, River West Fork .......... Class II 

Seventeen Mile Creek ............... Class III 

Silver Creek ............................... Class III 

Sitdown Creek ........................... Class III 

Six Mile Creek ........................... Class III 

South Nanamkin Creek ............. Class III 

Spring Creek ............................. Class III 

Stapaloop Creek ........................ Class III 

Stepstone Creek ........................ Class III 

Stranger Creek .......................... Class II 

Strawberry Creek ....................... Class III 

Swimptkin Creek ....................... Class III 

Three Forks Creek .................... Class I 

Three Mile Creek ....................... Class III 

Thirteen Mile Creek ................... Class II 

Thirty Mile Creek ....................... Class II 

Trail Creek ................................. Class III 

Twentyfive Mile Creek ............... Class III 

Twentyone Mile Creek .............. Class III 

Twentythree Mile Creek ............ Class III 

Wannacot Creek ........................ Class III 

Wells Creek ............................... Class I 

Whitelaw Creek ......................... Class III 

Wilmont Creek ........................... Class II 

(2) Lakes: 

Apex Lake ................................. LC 

Big Goose Lake ......................... LC 

Bourgeau Lake .......................... LC 

Buffalo Lake .............................. LC 

Cody Lake ................................. LC 

Crawfish Lakes .......................... LC 

Camille Lake .............................. LC 

Elbow Lake ................................ LC 

Fish Lake ................................... LC 

Gold Lake .................................. LC 

Great Western Lake .................. LC 

Johnson Lake ............................ LC 

LaFleur Lake ............................. LC 

Little Goose Lake ...................... LC 

Little Owhi Lake ......................... LC 

McGinnis Lake ........................... LC 

Nicholas Lake ............................ LC 

Omak Lake ................................ SRW 

Owhi Lake ................................. SRW 

Penley Lake ............................... SRW 

Rebecca Lake ........................... LC 

Round Lake ............................... LC 

Simpson Lake ............................ LC 

Soap Lake ................................. LC 

Sugar Lake ................................ LC 

Summit Lake ............................. LC 

Twin Lakes ................................ SRW 

[54 FR 28625, July 6, 1989] 

§ 131.36 Toxics criteria for those states 

not complying with Clean Water 

Act section 303(c)(2)(B). 

(a) Scope. This section is not a general promulgation of the section 304(a) 

criteria for priority toxic pollutants 

but is restricted to specific pollutants 

in specific States. 

(b)(1) EPA’s Section 304(a) criteria 

for Priority Toxic Pollutants. 


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§ 131.36 40 CFR Ch. I (7–1–08 Edition) A B Freshwater C Saltwater D Human Health (10¥6 risk for carcinogens) For consumption of: (#) Compound CAS Number Criterion Maximum Conc. d

(μg/L) 

(B1) 

Criterion 

Continuous 

Conc. d

(μg/L) 

(B2) 

Criterion 

Maximum 

Conc. d

(μg/L) 

(C1) 

Criterion 

Continuous 

Conc. d

(μg/L) 

(C2) 

Water & 

Organisms 

(μg/L) 

(D1) 

Organisms 

Only 

(μg/L) 

(D2) 

1 Antimony ................................................................... 7440360 .......................... .......................... .......................... .......................... 14 a 4300 a 2 Arsenic ...................................................................... 7440382 360 m 190 m 69 m 36 m 0.018 abc 0.14 abc 3 Beryllium ................................................................... 7440417 .......................... .......................... .......................... .......................... n n 4 Cadmium ................................................................... 7440439 3.7 e 1.0 e 42 m 9.3 m n n 5a Chromium (III) ........................................................... 16065831 550 e 180 e .......................... .......................... n n 

b Chromium (VI) ........................................................... 18540299 15 m 10 m 1100 m 50 m n n 

6 Copper ...................................................................... 7440508 17 e 11 e 2.4 m 2.4 m 7 Lead .......................................................................... 7439921 65 e 2.5 e 210 m 8.1 m n n 8 Mercury ..................................................................... 7439976 2.1 m 0.012 ip 1.8 m 0.025 ip 0.14 0.15 9 Nickel ........................................................................ 7440020 1400 e 160 e 74 m 8.2 m 610 a 4600 a 

10 Selenium ................................................................... 7782492 20 p 5 p 290 m 71 m n n 11 Silver ......................................................................... 7440224 3.4 e .......................... 1.9 m 12 Thallium .................................................................... 7440280 .......................... .......................... .......................... .......................... 1.7 a 6.3 a 13 Zinc ........................................................................... 7440666 110 e 100 e 90 m 81 m 14 Cyanide ..................................................................... 57125 22 5.2 1 1 700 a 220000 aj 15 Asbestos ................................................................... 1332214 .......................... .......................... .......................... .......................... 7,000,000 

fibers/L k 

16 2,3,7,8-TCDD (Dioxin) .............................................. 1746016 .......................... .......................... .......................... .......................... 0.000000013 c 0.000000014 c 17 Acrolein ..................................................................... 107028 .......................... .......................... .......................... .......................... 320 780 18 Acrylonitrile ............................................................... 107131 .......................... .......................... .......................... .......................... 0.059 ac 0.66 ac 19 Benzene .................................................................... 71432 .......................... .......................... .......................... .......................... 1.2 ac 71 ac 20 Bromoform ................................................................ 75252 .......................... .......................... .......................... .......................... 4.3 ac 360 ac 21 Carbon Tetrachloride ................................................ 56235 .......................... .......................... .......................... .......................... 0.25 ac 4.4 ac 22 Chlorobenzene ......................................................... 108907 .......................... .......................... .......................... .......................... 680 a 21000 aj 23 Chlorodibromomethane ............................................ 124481 .......................... .......................... .......................... .......................... 0.41 ac 34 ac 24 Chloroethane ............................................................ 75003 25 2-Chloroethylvinyl Ether ........................................... 110758 26 Chloroform ................................................................ 67663 .......................... .......................... .......................... .......................... 5.7 ac 470 ac 27 Dichlorobromomethane ............................................ 75274 .......................... .......................... .......................... .......................... 0.27 ac 22 ac 28 1,1-Dichloroethane ................................................... 75343 29 1,2-Dichloroethane ................................................... 107062 .......................... .......................... .......................... .......................... 0.38 ac 99 ac 30 1,1-Dichloroethylene ................................................. 75354 .......................... .......................... .......................... .......................... 0.057 ac 3.2 ac 31 1,2-Dichloropropane ................................................. 78875 32 1,3-Dichloropropylene ............................................... 542756 .......................... .......................... .......................... .......................... 10 a 1700 a 33 Ethylbenzene ............................................................ 100414 .......................... .......................... .......................... .......................... 3100 a 29000 a 34 Methyl Bromide ......................................................... 74839 .......................... .......................... .......................... .......................... 48 a 4000 a 35 Methyl Chloride ......................................................... 74873 .......................... .......................... .......................... .......................... n n 36 Methylene Chloride ................................................... 75092 .......................... .......................... .......................... .......................... 4.7 ac 1600 ac 37 1,1,2,2-Tetrachloroethane ........................................ 79345 .......................... .......................... .......................... .......................... 0.17 ac 11 ac 38 Tetrachloroethylene .................................................. 127184 .......................... .......................... .......................... .......................... 0.8 c 8.85 c 39 Toluene ..................................................................... 108883 .......................... .......................... .......................... .......................... 6800 a 200000 a 


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Environmental Protection Agency § 131.36 40 1,2-Trans-Dichloroethylene ...................................... 156605 41 1,1,1-Trichloroethane ................................................ 71556 .......................... .......................... .......................... .......................... n n 42 1,1,2-Trichloroethane ................................................ 79005 .......................... .......................... .......................... .......................... 0.60 ac 42 ac 43 Trichloroethylene ...................................................... 79016 .......................... .......................... .......................... .......................... 2.7 c 81 c 44 Vinyl Chloride ........................................................... 75014 .......................... .......................... .......................... .......................... 2 c 525 c 45 2-Chlorophenol ......................................................... 95578 46 2,4-Dichlorophenol .................................................... 120832 .......................... .......................... .......................... .......................... 93 a 790 aj 47 2,4-Dimethylphenol ................................................... 105679 48 2-Methyl-4,6-Dinitrophenol ....................................... 534521 .......................... .......................... .......................... .......................... 13.4 765 49 2,4-Dinitrophenol ...................................................... 51285 .......................... .......................... .......................... .......................... 70 a 14000 a 50 2-Nitrophenol ............................................................ 88755 51 4-Nitrophenol ............................................................ 100027 52 3-Methyl-4-Chlorophenol .......................................... 59507 53 Pentachlorophenol .................................................... 87865 20 f 13 f 13 7.9 0.28 ac 8.2 acj 54 Phenol ....................................................................... 108952 .......................... .......................... .......................... .......................... 21000 a 4600000 aj 55 2,4,6-Trichlorophenol ................................................ 88062 .......................... .......................... .......................... .......................... 2.1 ac 6.5 ac 56 Acenaphthene ........................................................... 83329 57 Acenaphthylene ........................................................ 208968 58 Anthracene ............................................................... 120127 .......................... .......................... .......................... .......................... 9600 a 110000 a 59 Benzidine .................................................................. 92875 .......................... .......................... .......................... .......................... 0.00012 ac 0.00054 ac 60 Benzo(a)Anthracene ................................................. 56553 .......................... .......................... .......................... .......................... 0.0028 c 0.031 c 61 Benzo(a)Pyrene ........................................................ 50328 .......................... .......................... .......................... .......................... 0.0028 c 0.031 c 62 Benzo(b)Fluoranthene .............................................. 205992 .......................... .......................... .......................... .......................... 0.0028 c 0.031 c 63 Benzo(ghi)Perylene .................................................. 191242 64 Benzo(k)Fluoranthene .............................................. 207089 .......................... .......................... .......................... .......................... 0.0028 c 0.031 c 65 Bis(2-Chloroethoxy)Methane .................................... 111911 66 Bis(2-Chloroethyl)Ether ............................................ 111444 .......................... .......................... .......................... .......................... 0.031 ac 1.4 ac 67 Bis(2-Chloroisopropyl)Ether ...................................... 108601 .......................... .......................... .......................... .......................... 1400 a 170000 a 68 Bis(2-Ethylhexyl)Phthalate ........................................ 117817 .......................... .......................... .......................... .......................... 1.8 ac 5.9 ac 69 4-Bromophenyl Phenyl Ether ................................... 101553 70 Butylbenzyl Phthalate ............................................... 85687 71 2-Chloronaphthalene ................................................ 91587 72 4-Chlorophenyl Phenyl Ether ................................... 7005723 73 Chrysene .................................................................. 218019 .......................... .......................... .......................... .......................... 0.0028 c 0.031 c 74 Dibenzo(ah)Anthracene ............................................ 53703 .......................... .......................... .......................... .......................... 0.0028 c 0.031 c 75 1,2-Dichlorobenzene ................................................. 95501 .......................... .......................... .......................... .......................... 2700 a 17000 a 76 1,3-Dichlorobenzene ................................................. 541731 .......................... .......................... .......................... .......................... 400 2600 77 1,4-Dichlorobenzene ................................................. 106467 .......................... .......................... .......................... .......................... 400 2600 78 3,3′-Dichlorobenzidine .............................................. 91941 .......................... .......................... .......................... .......................... 0.04 ac 0.077 ac 79 Diethyl Phthalate ...................................................... 84662 .......................... .......................... .......................... .......................... 23000 a 120000 a 80 Dimethyl Phthalate ................................................... 131113 .......................... .......................... .......................... .......................... 313000 2900000 81 Di-n-Butyl Phthalate .................................................. 84742 .......................... .......................... .......................... .......................... 2700 a 12000 a 82 2,4-Dinitrotoluene ..................................................... 121142 .......................... .......................... .......................... .......................... 0.11 c 9.1 c 83 2,6-Dinitrotoluene ..................................................... 606202 84 Di-n-Octyl Phthalate ................................................. 117840 85 1,2-Diphenylhydrazine .............................................. 122667 .......................... .......................... .......................... .......................... 0.040 ac 0.54 ac 86 Fluoranthene ............................................................. 206440 .......................... .......................... .......................... .......................... 300 a 370 a 87 Fluorene .................................................................... 86737 .......................... .......................... .......................... .......................... 1300 a 14000 a 88 Hexachlorobenzene .................................................. 118741 .......................... .......................... .......................... .......................... 0.00075 ac 0.00077 ac 89 Hexachlorobutadiene ................................................ 87683 .......................... .......................... .......................... .......................... 0.44 ac 50 ac 


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§ 131.36 40 CFR Ch. I (7–1–08 Edition) A B Freshwater C Saltwater D Human Health (10¥6 risk for carcinogens) For consumption of: (#) Compound CAS Number Criterion Maximum Conc. d

(μg/L) 

(B1) 

Criterion 

Continuous 

Conc. d

(μg/L) 

(B2) 

Criterion 

Maximum 

Conc. d

(μg/L) 

(C1) 

Criterion 

Continuous 

Conc. d

(μg/L) 

(C2) 

Water & 

Organisms 

(μg/L) 

(D1) 

Organisms 

Only 

(μg/L) 

(D2) 

90 Hexachlorocyclopentadiene ...................................... 77474 .......................... .......................... .......................... .......................... 240 a 17000 aj 91 Hexachloroethane ..................................................... 67721 .......................... .......................... .......................... .......................... 1.9 ac 8.9 ac 92 Indeno(1,2,3-cd)Pyrene ............................................ 193395 .......................... .......................... .......................... .......................... 0.0028 c 0.031 c 93 Isophorone ................................................................ 78591 .......................... .......................... .......................... .......................... 8.4 ac 600 ac 94 Naphthalene ............................................................. 91203 95 Nitrobenzene ............................................................ 98953 .......................... .......................... .......................... .......................... 17 a 1900 aj 96 N-Nitrosodimethylamine ........................................... 62759 .......................... .......................... .......................... .......................... 0.00069 ac 8.1 ac 97 N-Nitrosodi-n-Propylamine ....................................... 621647 98 N-Nitrosodiphenylamine ........................................... 86306 .......................... .......................... .......................... .......................... 5.0 ac 16 ac 99 Phenanthrene ........................................................... 85018 

100 Pyrene ...................................................................... 129000 .......................... .......................... .......................... .......................... 960 a 11000 a 101 1,2,4-Trichlorobenzene ............................................. 120821 102 Aldrin ......................................................................... 309002 3 g .......................... 1.3 g .......................... 0.00013 ac 0.00014 ac 103 alpha-BHC ................................................................ 319846 .......................... .......................... .......................... .......................... 0.0039 ac 0.013 ac 104 beta-BHC .................................................................. 319857 .......................... .......................... .......................... .......................... 0.014 ac 0.046 ac 105 gamma-BHC ............................................................. 58899 2 g 0.08 g 0.16 g .......................... 0.019 c 0.063 c 106 delta-BHC ................................................................. 319868 107 Chlordane ................................................................. 57749 2.4 g 0.0043 g 0.09 g 0.004 g 0.00057 ac 0.00059 ac 108 4,4′-DDT ................................................................... 50293 1.1 g 0.001 g 0.13 g 0.001 g 0.00059 ac 0.00059 ac109 4,4′-DDE ................................................................... 72559 .......................... .......................... .......................... .......................... 0.00059 ac 0.00059 ac 110 4,4′-DDD ................................................................... 72548 .......................... .......................... .......................... .......................... 0.00083 ac 0.00084 ac 111 Dieldrin ...................................................................... 60571 2.5 g 0.0019 g 0.71 g 0.0019 g 0.00014 ac 0.00014 ac 112 alpha-Endosulfan ...................................................... 959988 0.22 g 0.056 g 0.034 g 0.0087 g 0.93 a 2.0 a 113 beta-Endosulfan ........................................................ 33213659 0.22 g 0.056 g 0.034 g 0.0087 g 0.93 a 2.0 a114 Endosulfan Sulfate ................................................... 1031078 .......................... .......................... .......................... .......................... 0.93 a 2.0 a 115 Endrin ....................................................................... 72208 0.18 g 0.0023 g 0.037 g 0.0023 g 0.76 a 0.81 aj 116 Endrin Aldehyde ....................................................... 7421934 .......................... .......................... .......................... .......................... 0.76 a 0.81 aj 117 Heptachlor ................................................................ 76448 0.52 g 0.0038 g 0.053 g 0.0036 g 0.00021 ac 0.00021 ac 118 Heptachlor Epoxide .................................................. 1024573 0.52 g 0.0038 g 0.053 g 0.0036 g 0.00010 ac 0.00011 ac 119 PCB–1242 ................................................................ 53469219 .......................... 0.014 g .......................... 0.03 g 120 PCB–1254 ................................................................ 11097691 .......................... 0.014 g .......................... 0.03 g 121 PCB–1221 ................................................................ 11104282 .......................... 0.014 g .......................... 0.03 g 122 PCB–1232 ................................................................ 11141165 .......................... 0.014 g .......................... 0.03 g 123 PCB–1248 ................................................................ 12672296 .......................... 0.014 g .......................... 0.03 g 124 PCB–1260 ................................................................ 11096825 .......................... 0.014 g .......................... 0.03 g 125a PCB–1016 ................................................................ 12674112 .......................... 0.014 g .......................... 0.03 g 125b Polychlorinated biphenyls 

(PCBs) ................................................................... .......................... .......................... .......................... .......................... .......................... 0.00017 q 0.00017 q 

126 Toxaphene ................................................................ 8001352 0.73 0.0002 0.21 0.0002 0.00073 ac 0.00075 ac 

Total Number of Criteria (h) = ............................... .......................... 24 29 23 27 85 84 


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Environmental Protection Agency § 131.36 

FOOTNOTES

a. Criteria revised to reflect current agency q1* or RfD, as contained in the Integrated 

Risk Information System (IRIS). The fish 

tissue bioconcentration factor (BCF) from 

the 1980 criteria documents was retained in 

all cases. 

b. The criteria refers to the inorganic form 

only. 

c. Criteria in the matrix based on carcinogenicity (10¥6 risk). For a risk level of 10¥5, 

move the decimal point in the matrix value 

one place to the right. 

d. Criteria Maximum Concentration (CMC) 

= the highest concentration of a pollutant to 

which aquatic life can be exposed for a short 

period of time (1-hour average) without deleterious effects. Criteria Continuous Concentration (CCC) = the highest concentration 

of a pollutant to which aquatic life can be 

exposed for an extended period of time (4 

days) without deleterious effects. μg/L = 

micrograms per liter. 

e. Freshwater aquatic life criteria for these 

metals are expressed as a function of total 

hardness (mg/L as CaCO3), the pollutant’s 

water effect ratio (WER) as defined in 

§ 131.36(c) and multiplied by an appropriate 

dissolved conversion factor as defined in 

§ 131.36(b)(2). For comparative purposes, the 

values displayed in this matrix are shown as 

dissolved metal and correspond to a total 

hardness of 100 mg/L and a water effect ratio 

of 1.0. 

f. Freshwater aquatic life criteria for 

pentachlorophenol are expressed as a function of pH, and are calculated as follows. 

Values displayed above in the matrix correspond to a pH of 7.8. 

CMC = exp(1.005(pH)¥4.830) 

CCC = exp(1.005(pH)¥5.290) 

g. Aquatic life criteria for these compounds were issued in 1980 utilizing the 1980 

Guidelines for criteria development. The 

acute values shown are final acute values 

(FAV) which by the 1980 Guidelines are instantaneous values as contrasted with a CMC 

which is a one-hour average. 

h. These totals simply sum the criteria in 

each column. For aquatic life, there are 31 

priority toxic pollutants with some type of 

freshwater or saltwater, acute or chronic criteria. For human health, there are 85 priority toxic pollutants with either ‘‘water + 

fish’’ or ‘‘fish only’’ criteria. Note that these 

totals count chromium as one pollutant even 

though EPA has developed criteria based on 

two valence states. In the matrix, EPA has 

assigned numbers 5a and 5b to the criteria 

for chromium to reflect the fact that the list 

of 126 priority toxic pollutants includes only 

a single listing for chromium. 

i. If the CCC for total mercury exceeds 

0.012 μg/l more than once in a 3-year period in 

the ambient water, the edible portion of 

aquatic species of concern must be analyzed 

to determine whether the concentration of 

methyl mercury exceeds the FDA action 

level (1.0 mg/kg). If the FDA action level is 

exceeded, the State must notify the appropriate EPA Regional Administrator, initiate 

a revision of its mercury criterion in its 

water quality standards so as to protect designated uses, and take other appropriate action such as issuance of a fish consumption 

advisory for the affected area. 

j. No criteria for protection of human 

health from consumption of aquatic organisms (excluding water) was presented in the 

1980 criteria document or in the 1986 Quality 

Criteria for Water. Nevertheless, sufficient 

information was presented in the 1980 document to allow a calculation of a criterion, 

even though the results of such a calculation 

were not shown in the document. 

k. The criterion for asbestos is the MCL (56 

FR 3526, January 30, 1991). 

l. [Reserved: This letter not used as a footnote.] 

m. Criteria for these metals are expressed 

as a function of the water effect ratio, WER, 

as defined in 40 CFR 131.36(c). 

CMC = column B1 or C1 value × WER 

CCC = column B2 or C2 value × WER 

n. EPA is not promulgating human health 

criteria for this contaminant. However, permit authorities should address this contaminant in NPDES permit actions using the 

State’s existing narrative criteria for toxics. 

o. [Reserved: This letter not used as a footnote.] 

p. Criterion expressed as total recoverable. 

q. This criterion applies to total PCBs (e.g., 

the sum of all congener or isomer or homolog or Aroclor analyses). 

GENERAL NOTES

1. This chart lists all of EPA’s priority 

toxic pollutants whether or not criteria recommendations are available. Blank spaces 

indicate the absence of criteria recommendations. Because of variations in chemical nomenclature systems, this listing of toxic pollutants does not duplicate the listing in Appendix A of 40 CFR Part 423. EPA has added 

the Chemical Abstracts Service (CAS) registry numbers, which provide a unique identification for each chemical. 

2. The following chemicals have 

organoleptic based criteria recommendations 

that are not included on this chart (for reasons which are discussed in the preamble): 

copper, zinc, chlorobenzene, 2-chlorophenol, 

2,4-dichlorophenol, acenaphthene, 2,4- 

dimethylphenol, 3-methyl-4-chlorophenol, 

hexachlorocyclopentadiene, 

pentachlorophenol, phenol. 

3. For purposes of this rulemaking, freshwater criteria and saltwater criteria apply as 

specified in 40 CFR 131.36(c). 

NOTE TO PARAGRAPH (b)(1): On April 14, 

1995, the Environmental Protection Agency 


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§ 131.36 40 CFR Ch. I (7–1–08 Edition) 

issued a stay of certain criteria in paragraph 

(b)(1) of this section as follows: the criteria 

in columns B and C for arsenic, cadmium, 

chromium (VI), copper, lead, nickel, silver, 

and zinc; the criteria in B1 and C1 for mercury; the criteria in column B for chromium 

(III); and the criteria in column C for selenium. The stay remains in effect until further notice. 

(2) Factors for Calculating Hardness-Dependent, Freshwater Metals Criteria 

CMC=WER exp { mA[ln(hardness)]+bA} × 

Acute Conversion Factor 

CCC=WER exp { mC[ln(hardness)]+bC} × 

Chronic Conversion Factor 

Final CMC and CCC values should be rounded 

to two significant figures. 

Metal mA bA mC bC

Freshwater conversion 

factors 

Acute Chronic 

Cadmium ............................................... 1.128 –3.828 0.7852 –3.490 a 0.944 a 0.909 

Chromium (III) ....................................... 0.8190 3.688 0.8190 1.561 0.316 0.860 

Copper .................................................. 0.9422 –1.464 0.8545 –1.465 0.960 0.960 

Lead ...................................................... 1.273 -1.460 1.273 –4.705 a 0.791 a 0.791 

Nickel .................................................... 0.8460 3.3612 0.8460 1.1645 0.998 0.997 

Silver ..................................................... 1.72 –6.52 b N/A b N/A 0.85 b N/A 

Zinc ....................................................... 0.8473 0.8604 0.8473 0.7614 0.978 0.986 

Note to table: The term ‘‘exp’’ represents the base e exponential function. Footnotes to table: 

aThe freshwater conversion factors (CF) for cadmium and lead are hardness-dependent and can be calculated for any hardness [see limitations in § 131.36(c)(4)] using the following equations: 

Cadmium 

Acute: CF=1.136672—[(ln hardness)(0.041838)] 

Chronic: CF=1.101672—[(ln hardness)(0.041838)] 

Lead (Acute and Chronic): CF = 1.46203—[(ln hardness)(0.145712)] 

b No chronic criteria are available for silver. 

(c) Applicability. (1) The criteria in paragraph (b) of this section apply to the States’

designated uses cited in paragraph (d) of this 

section and supersede any criteria adopted 

by the State, except when State regulations 

contain criteria which are more stringent for 

a particular use in which case the State’s 

criteria will continue to apply. 

(2) The criteria established in this section 

are subject to the State’s general rules of applicability in the same way and to the same 

extent as are the other numeric toxics criteria when applied to the same use classifications including mixing zones, and low 

flow values below which numeric standards 

can be exceeded in flowing fresh waters. 

(i) For all waters with mixing zone regulations or implementation procedures, the criteria apply at the appropriate locations 

within or at the boundary of the mixing 

zones; otherwise the criteria apply throughout the waterbody including at the end of 

any discharge pipe, canal or other discharge 

point. 

(ii) A State shall not use a low flow value 

below which numeric standards can be exceeded that is less stringent than the following for waters suitable for the establishment of low flow return frequencies (i.e., 

streams and rivers): 

AQUATIC LIFE

Acute criteria (CMC) 1 Q 10 or 1 B 3 

Chronic criteria 

(CCC) 

7 Q 10 or 4 B 3 

HUMAN HEALTH

Non-carcinogens 30 Q 5 

Carcinogens Harmonic mean flow 

Where: 

CMC—criteria maximum concentration—the 

water quality criteria to protect against 

acute effects in aquatic life and is the 

highest instream concentration of a priority toxic pollutant consisting of a onehour average not to be exceeded more than 

once every three years on the average; 

CCC—criteria continuous concentration—the 

water quality criteria to protect against 

chronic effects in aquatic life is the highest instream concentration of a priority 

toxic pollutant consisting of a 4-day average not to be exceeded more than once 

every three years on the average; 

1 Q 10 is the lowest one day flow with an average recurrence frequency of once in 10 

years determined hydrologically; 

1 B 3 is biologically based and indicates an 

allowable exceedence of once every 3 years. 

It is determined by EPA’s computerized 

method (DFLOW model); 

7 Q 10 is the lowest average 7 consecutive day 

low flow with an average recurrence frequency of once in 10 years determined 

hydrologically; 

4 B 3 is biologically based and indicates an 

allowable exceedence for 4 consecutive 

days once every 3 years. It is determined 

by EPA’s computerized method (DFLOW 

model); 

30 Q 5 is the lowest average 30 consecutive 

day low flow with an average recurrence 

frequency of once in 5 years determined 

hydrologically; and the harmonic mean 


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Environmental Protection Agency § 131.36 

flow is a long term mean flow value calculated by dividing the number of daily 

flows analyzed by the sum of the reciprocals of those daily flows. 

(iii) If a State does not have such a 

low flow value for numeric standards 

compliance, then none shall apply and 

the criteria included in paragraph (d) 

of this section herein apply at all 

flows. 

(3) The aquatic life criteria in the 

matrix in paragraph (b) of this section 

apply as follows: 

(i) For waters in which the salinity is 

equal to or less than 1 part per thousand 95% or more of the time, the applicable criteria are the freshwater criteria in Column B; 

(ii) For waters in which the salinity 

is equal to or greater than 10 parts per 

thousand 95% or more of the time, the 

applicable criteria are the saltwater 

criteria in Column C; and 

(iii) For waters in which the salinity 

is between 1 and 10 parts per thousand 

as defined in paragraphs (c)(3) (i) and 

(ii) of this section, the applicable criteria are the more stringent of the 

freshwater or saltwater criteria. However, the Regional Administrator may 

approve the use of the alternative 

freshwater or saltwater criteria if scientifically defensible information and 

data demonstrate that on a site-specific basis the biology of the waterbody 

is dominated by freshwater aquatic life 

and that freshwater criteria are more 

appropriate; or conversely, the biology 

of the waterbody is dominated by saltwater aquatic life and that saltwater 

criteria are more appropriate. 

(4) Application of metals criteria. (i) 

For purposes of calculating freshwater 

aquatic life criteria for metals from 

the equations in paragraph (b)(2) of 

this section, the minimum hardness allowed for use in those equations shall 

not be less than 25 mg/l, as calcium 

carbonate, even if the actual ambient 

hardness is less than 25 mg/l as calcium 

carbonate. The maximum hardness 

value for use in those equations shall 

not exceed 400 mg/l as calcium carbonate, even if the actual ambient 

hardness is greater than 400 mg/l as 

calcium carbonate. The same provisions apply for calculating the metals 

criteria for the comparisons provided 

for in paragraph (c)(3)(iii) of this section. 

(ii) The hardness values used shall be 

consistent with the design discharge 

conditions established in paragraph 

(c)(2) of this section for flows and mixing zones. 

(iii) Except where otherwise noted, 

the criteria for metals (compounds #2, 

#4–# 11, and #13, in paragraph (b) of 

this section) are expressed as dissolved 

metal. For purposes of calculating 

aquatic life criteria for metals from 

the equations in footnote m. in the criteria matrix in paragraph (b)(1) of this 

section and the equations in paragraphs (b)(2) of this section, the watereffect ratio is computed as a specific 

pollutant’s acute or chronic toxicity 

values measured in water from the site 

covered by the standard, divided by the 

respective acute or chronic toxicity 

value in laboratory dilution water. 

(d) Criteria for Specific Jurisdictions—

(1) Rhode Island, EPA Region 1. (i) All 

waters assigned to the following use 

classifications in the Water Quality 

Regulations for Water Pollution Control adopted under Chapters 46–12, 42–

17.1, and 42–35 of the General Laws of 

Rhode Island are subject to the criteria 

in paragraph (d)(1)(ii) of this section, 

without exception: 

6.21 Freshwater 6.22 Saltwater: 

Class A .................... Class SA 

Class B .................... Class SB 

Class C .................... Class SC 

(ii) The following criteria from the 

matrix in paragraph (b)(1) of this section apply to the use classifications 

identified in paragraph (d)(1)(i) of this 

section: 

Use classification Applicable criteria 

Class A ..................................

Class B waters where water 

supply use is designated 

These classifications are assigned the criteria in Column D1—#2, 68 

Class B waters where water 

supply use is not designated.

Class C; 

Class SA; 

Class SB; 

Class SC 

Each of these classifications 

is assigned the criteria in: 

Column D2—#2, 68 

(iii) The human health criteria shall 

be applied at the 10¥5 risk level, consistent with the State policy. To determine appropriate value for carcinogens, see footnote c in the criteria matrix in paragraph (b)(1) of this section. 


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§ 131.36 40 CFR Ch. I (7–1–08 Edition) 

(2) Vermont, EPA Region 1. (i) All waters assigned to the following use classifications in the Vermont Water Quality Standards adopted under the authority of the Vermont Water Pollution Control Act (10 V.S.A., Chapter 47) 

are subject to the criteria in paragraph 

(d)(2)(ii) of this section, without exception: 

Class A 

Class B 

Class C 

(ii) The following criteria from the 

matrix in paragraph (b)(1) of this section apply to the use classifications 

identified in paragraph (d)(2)(i) of this 

section: 

Use classification Applicable criteria 

1. Classes A1, A2, B1, B2, B3 .................................................... These classification are assigned the criterion in: 

Column B2—#105. 

(iii) The human health criteria shall 

be applied at the State-proposed 10¥6

risk level. 

(3) New Jersey, EPA Region 2. (i) All 

waters assigned to the following use 

classifications in the New Jersey Administrative Code (N.J.A.C.) 7:9–4.1 et 

seq., Surface Water Quality Standards, 

are subject to the criteria in paragraph 

(d)(3)(ii) of this section, without exception. 

N.J.A.C. 7:9–4.12(b): Class PL 

N.J.A.C. 7:9–4.12(c): Class FW2 

N.J.A.C. 7:9–4.12(d): Class SE1 

N.J.A.C. 7:9–4.12(e): Class SE2 

N.J.A.C. 7:9–4.12(f): Class SE3 

N.J.A.C. 7:9–4.12(g): Class SC 

N.J.A.C. 7:9–4.13(a): Delaware River Zones 1C, 

1D, and 1E 

N.J.A.C. 7:9–4.13(b): Delaware River Zone 2 

N.J.A.C. 7:9–4.13(c): Delaware River Zone 3 

N.J.A.C. 7:9–4.13(d): Delaware River Zone 4 

N.J.A.C. 7:9–4.13(e): Delaware River Zone 5 

N.J.A.C. 7:9–4.13(f): Delaware River Zone 6 

(ii) The following criteria from the 

matrix in paragraph (b)(1) of this section apply to the use classifications 

identified in paragraph (d)(3)(i) of this 

section: 

Use classification Applicable criteria 

1. Freshwater Pinelands, FW2 .................................................... These classifications are each assigned the criteria in: 

i. Column B1—#2, 4, 5a, 5b, 6–11, 13. 

ii. Column B2—#2, 4, 5a, 5b, 6–10, 13. 

iii. Column D1—#125b at a 10¥6 risk level. 

iv. Column D2—#125b at a 10¥6 risk level. 

v. Column D2—#23, 30, 37, 42, 87, 89, 93 and 105 at a 10¥5

risk level. 

2. PL (Saline Water Pinelands), SE1, SE2, SE3, SC, Delaware 

Bay Zone 6.

These classifications are each assigned the criteria in: 

i. Column C1—#2, 4, 5b, 6–11, 13. 

ii. Column C2—#2, 4, 5b, 6–10, 13. 

iii. Column D1—#125b at a 10¥6 risk level. 

iv. Column D2—#125b at a 10¥6 risk level. 

v. Column D2—#23, 30, 37, 42, 87, 89, 93 and 105 at a 10¥5

risk level. 

3. Delaware River Zones 1C, 1D, 1E, 2, 3, 4, and 5 ................. i. Column B1—none. 

ii. Column B2—none. 

iii. Column D1—none. 

iv. Column D2—none. 

4. Delaware River Zones 3, 4, and 5 .......................................... These classifications are each assigned the criteria in: 

i. Column C1—none. 

ii. Column C2—none. 

iii. Column D2—none. 

(iii) The human health criteria shall 

be applied at the State-proposed 10¥6

risk level for EPA rated Class A, B1, 

and B2 carcinogens; EPA rated Class C 

carcinogens shall be applied at 10¥5

risk level. To determine appropriate 

value for carcinogens, see footnote c. in 

the matrix in paragraph (b)(1) of this 

section. 

(4) Puerto Rico, EPA Region 2. (i) All 

waters assigned to the following use 

classifications in the Puerto Rico 


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Environmental Protection Agency § 131.36 

Water Quality Standards (promulgated 

by Resolution Number R–83–5–2) are 

subject to the criteria in paragraph 

(d)(4)(ii) of this section, without exception. 

Article 2.2.2—Class SB 

Article 2.2.3—Class SC 

Article 2.2.4—Class SD 

(ii) The following criteria from the 

matrix in paragraph (b)(1) of this section apply to the use classifications 

identified in paragraph (d)(4)(i) of this 

section: 

Use classification Applicable criteria 

Class SD ...................................................................................... Column B1—# 118. 

Column B2—#s 8, 105, 115, 118, 119, 120, 121, 122, 123,124, 

125a, 125b. 

Column D1—#s 12, 16, 27, 60, 61, 62, 64, 73, 74, 92, 93, 103, 

104, 114, 116, 118, 119, 120, 121, 122, 123, 124, 125a, 

125b. 

Class SB, Class SC .................................................................... Column C1—#s 5b, 112, 113, 118. 

Column C2—#s 5b, 8, 112, 113, 118, 119, 120, 121, 122, 123, 

124, 125a, 125b. 

Column D2—#s 12, 16, 27, 60, 61, 62, 64, 73, 74, 87, 92, 93, 

103, 104, 114, 116, 118, 119, 120, 121, 122, 123, 124, 

125a, 125b. 

(iii) The human health criteria shall 

be applied at the State-proposed 10¥5

risk level. To determine appropriate 

value for carcinogens, see footnote c, in 

the criteria matrix in paragraph (b)(1) 

of this section. 

(5) District of Columbia, EPA Region 3. 

(i) All waters assigned to the following 

use classifications in chapter 11 Title 

21 DCMR, Water Quality Standards of 

the District of Columbia are subject to 

the criteria in paragraph (d)(5)(ii) of 

this section, without exception: 

1101.2 Class C waters 

(ii) The following criteria from the 

matrix in paragraph (b)(1) of this section apply to the use classification 

identified in paragraph (d)(5)(i) of this 

section: 

Use classification Applicable criteria 

1. Class C .................................................................................... This classification is assigned the additional criteria in: 

Column B2; #10, 118, 126. 

(iii) The human health criteria shall 

be applied at the State-adopted 10¥6

risk level. 

(6) Florida, EPA Region 4. (i) All waters assigned to the following use classifications in Chapter 17–301 of the 

Florida Administrative Code (i.e., identified in Section 17–302.600) are subject 

to the criteria in paragraph (d)(6)(ii) of 

this section, without exception: 

Class I 

Class II 

Class III 

(ii) The following criteria from the 

matrix paragraph (b)(1) of this section 

apply to the use classifications identified in paragraph (d)(6)(i) of this section: 

Use classification Applicable criteria 

Class I .......................................................................................... This classification is assigned the criteria in: 

Column D1—#16 

Class II .........................................................................................

Class III (marine) .........................................................................

This classification is assigned the criteria in: 

Column D2—#16 

Class III (freshwater) ................................................................... This classification is assigned the criteria in: 

Column D2—#16 


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§ 131.36 40 CFR Ch. I (7–1–08 Edition) 

(iii) The human health criteria shall 

be applied at the State-adopted 10¥6

risk level. 

(7)–(8) [Reserved] 

(9) Kansas, EPA Region 7. (i) All waters assigned to the following use classification in the Kansas Department of 

Health and Environment regulations, 

K.A.R. 28–16–28b through K.A.R. 28–16–

28f, are subject to the criteria in paragraph (d)(9)(ii) of this section, without 

exception. 

Section (2)(A)—Special Aquatic Life Use Waters 

Section (2)(B)—Expected Aquatic Life Use 

Waters 

Section (2)(C)—Restricted Aquatic Life Use 

Waters 

Section (3)—Domestic Water Supply. 

Section (4)—Food Procurement Use. 

(ii) The following criteria from the 

matrix in paragraph (b)(1) of this section apply to the use classifications 

identified in paragraph (d)(9)(i) of this 

section: 

Use classification Applicable criteria 

1. Sections (2)(A), (2)(B), (2)(C), (4) ........................................... These classifications are each assigned criteria as follows: 

i. Column B1, #2. 

ii. Column D2, #12, 21, 29, 39, 46, 68, 79, 81, 86, 93, 104, 

114, 118. 

2. Section (3) ............................................................................... This classification is assigned all criteria in: 

Column D1, all except #1, 9, 12, 14, 15, 17, 22, 33, 36, 39, 44, 

75, 77, 79, 90, 112, 113, and 115. 

(iii) The human health criteria shall 

be applied at the State-adopted 10¥6

risk level. 

(10) California, EPA Region 9. (i) All 

waters assigned any aquatic life or 

human health use classifications in the 

Water Quality Control Plans for the 

various Basins of the State (‘‘Basin 

Plans’’), as amended, adopted by the 

California State Water Resources Control Board (‘‘SWRCB’’), except for 

ocean waters covered by the Water 

Quality Control Plan for Ocean Waters 

of California (‘‘Ocean Plan’’) adopted 

by the SWRCB with resolution Number 

90–27 on March 22, 1990, are subject to 

the criteria in paragraph (d)(10)(ii) of 

this section, without exception. These 

criteria amend the portions of the existing State standards contained in the 

Basin Plans. More particularly these 

criteria amend water quality criteria 

contained in the Basin Plan Chapters 

specifying water quality objectives 

(the State equivalent of federal water 

quality criteria) for the toxic pollutants identified in paragraph (d)(10)(ii) 

of this section. Although the State has 

adopted several use designations for 

each of these waters, for purposes of 

this action, the specific standards to be 

applied in paragraph (d)(10)(ii) of this 

section are based on the presence in all 

waters of some aquatic life designation 

and the presence or absence of the 

MUN use designation (Municipal and 

domestic supply). (See Basin Plans for 

more detailed use definitions.) 

(ii) The following criteria from the 

matrix in paragraph (b)(1) of this section apply to the water and use classifications defined in paragraph (d)(10)(i) 

of this section and identified below: 

Water and use classification Applicable criteria 

Waters of the State defined as bays or estuaries except the 

Sacramento-San Joaquin Delta and San Francisco Bay 

These waters are assigned the 

criteria in: 

Column B1—pollutants 5a 

and 14 

Column B2—pollutants 5a 

and 14 

Column C1—pollutant 14 

Column C2—pollutant 14 

Column D2—pollutants 1, 

12, 17, 18, 21, 22, 29, 30, 32, 

33, 37, 38, 42–44, 46, 48, 49, 

54, 59, 66, 67, 68, 78–82, 85, 

89, 90, 91, 93, 95, 96, 98 


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Environmental Protection Agency § 131.36 

Water and use classification Applicable criteria 

Waters of the Sacramento—San Joaquin Delta and waters of 

the State defined as inland (i.e., all surface waters of the 

State not bays or estuaries or ocean) that include a MUN 

use designation 

These waters are assigned the 

criteria in: 

Column B1—pollutants 5a 

and 14 

Column B2—pollutants 5a 

and 14 

Column D1—pollutants 1, 

12, 15, 17, 18, 21, 22, 29, 30, 

32, 33, 37, 38, 42–48, 49, 59, 

66, 67, 68, 78–82, 85, 89, 90, 

91, 93, 95, 96, 98 

Waters of the State defined as inland without an MUN use 

designation 

These waters are assigned the 

criteria in: 

Column B1—pollutants 5a 

and 14 

Column B2—pollutants 5a 

and 14 

Column D2—pollutants 1, 

12, 17, 18, 21, 22, 29, 30, 32, 

33, 37, 38, 42–44, 46, 48, 49, 

54, 59, 66, 67, 68, 78–82, 85, 

89, 90, 91, 93, 95, 96, 98 

Waters of the San Joaquin River from the mouth of the 

Merced River to Vernalis 

In addition to the criteria assigned to these waters elsewhere in this rule, these waters are assigned the criteria in: 

Column B2—pollutant 10 

Waters of Salt Slough, Mud Slough (north) and the San Joaquin River, Sack Dam to the mouth of the Merced River In addition to the criteria assigned to these waters elsewhere in this rule, these waters are assigned the criteria in: 

Column B1—pollutant 10 

Column B2—pollutant 10 

Waters of San Francisco Bay upstream to and including 

Suisun Bay and the Sacramento-San Joaquin Delta 

These waters are assigned the 

criteria in: 

Column B1—pollutants 5a, 

10* and 14 

Column B2—pollutants 5a, 

10* and 14 

Column C1—pollutant 14 

Column C2—pollutant 14 

Column D2—pollutants 1, 

12, 17, 18, 21, 22, 29, 30, 32, 

33, 37, 38, 42–44, 46, 48, 49, 

54, 59, 66, 67, 68, 78–82, 85, 

89, 90, 91, 93, 95, 96, 98 

All inland waters of the United States or enclosed bays and 

estuaries that are waters of the United States that include 

an MUN use designation and that the State has either excluded or partially excluded from coverage under its Water 

Quality Control Plan for Inland Surface Waters of California, Tables 1 and 2, or its Water Quality Control Plan 

for Enclosed Bays and Estuaries of California, Tables 1 and 

2, or has deferred applicability of those tables. (Category 

(a), (b), and (c) waters described on page 6 of Water Quality 

Control Plan for Inland Surface Waters of California or 

page 6 of its Water Quality Control Plan for Enclosed Bays 

and Estuaries of California.) 

These waters are assigned the 

criteria for pollutants for 

which the State does not 

apply Table 1 or 2 standards. These criteria are: 

Column B1—all pollutants 

Column B2—all pollutants 

Column D1—all pollutants 

except #2 


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§ 131.36 40 CFR Ch. I (7–1–08 Edition) 

Water and use classification Applicable criteria 

All inland waters of the United States that do not include an 

MUN use designation and that the State has either excluded or partially excluded from coverage under its Water 

Quality Control Plan for Inland Surface Waters of California, Tables 1 and 2, or has deferred applicability of these 

tables. (Category (a), (b), and (c) waters described on page 6 

of Water Quality Control Plan for Inland Surface Waters of 

California.) 

These waters are assigned the 

criteria for pollutants for 

which the State does not 

apply Table 1 or 2 standards. These criteria are: 

Column B1—all pollutants 

Column B2—all pollutants 

Column D2—all pollutants 

except #2 

All enclosed bays and estuaries that are waters of the United 

States that do not include an MUN designation and that 

the State has either excluded or partially excluded from 

coverage under its Water Quality Control Plan for Inland 

Surface Waters of California, Tables 1 and 2, or its Water 

Quality Control Plan for Enclosed Bays and Estuaries of 

California, Tables 1 and 2, or has deferred applicability of 

those tables. (Category (a), (b), and (c) waters described on 

page 6 of Water Quality Control Plan for Inland Surface 

Waters of California or page 6 of its Water Quality Control 

Plan for Enclosed Bays and Estuaries of California.) 

These waters are assigned the 

criteria for pollutants for 

which the State does not 

apply Table 1 or 2 standards. These criteria are: 

Column B1—all pollutants 

Column B2—all pollutants 

Column C1—all pollutants 

Column C2—all pollutants 

Column D2—all pollutants 

except #2 

*The fresh water selenium criteria are included for the San Francisco Bay estuary because 

high levels of bioaccumulation of selenium in the estuary indicate that the salt water criteria are underprotective for San Francisco Bay. 

(iii) The human health criteria shall 

be applied at the State-adopted 10¥6

risk level. 

(11) Nevada, EPA Region 9. (i) All waters assigned the use classifications in 

Chapter 445 of the Nevada Administrative Code (NAC), Nevada Water Pollution Control Regulations, which are referred to in paragraph (d)(11)(ii) of this 

section, are subject to the criteria in 

paragraph (d)(11)(ii) of this section, 

without exception. These criteria 

amend the existing State standards 

contained in the Nevada Water Pollution Control Regulations. More particularly, these criteria amend or supplement the table of numeric standards 

in NAC 445.1339 for the toxic pollutants 

identified in paragraph (d)(11)(ii) of 

this section. 

(ii) The following criteria from matrix in paragraph (b)(1) of this section 

apply to the waters defined in paragraph (d)(11)(i) of this section and identified below: 

Water and use classification Applicable criteria 

Waters that the State has included in NAC 

445.1339 where Municipal or domestic supply 

is a designated use 

These waters are assigned the criteria in: 

Column B1—pollutant #118 

Column B2—pollutant #118 

Column D1—pollutants #15, 16, 18, 19, 20, 

21, 23, 26, 27, 29, 30, 34, 37, 38, 42, 43, 55, 

58–62, 64, 66, 73, 74, 78, 82, 85, 87–89, 91, 92, 

96, 98, 100, 103, 104, 105, 114, 116, 117, 118 

Waters that the State has included in NAC 

445.1339 where Municipal or domestic supply 

is not a designated use 

These waters are assigned the criteria in: 

Column B1—pollutant #118 

Column B2—pollutant #118 

Column D2—all pollutants except #2. 

(iii) The human health criteria shall 

be applied at the 10¥5 risk level, consistent with State policy. To determine 

appropriate value for carcinogens, see 

footnote c in the criteria matrix in 

paragraph (b)(1) of this section. 

(12) Alaska, EPA Region 10. (i) All waters assigned to the following use classifications in the Alaska Administrative Code (AAC), Chapter 18 (i.e., identified in 18 AAC 70.020) are subject to 

the criteria in paragraph (d)(12)(ii) of 

this section, without exception: 


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Environmental Protection Agency § 131.37 

70.020.(1) (A) Fresh Water 

70.020.(1) (A) Water Supply 

(i) Drinking, culinary, and food processing, 

(iii) Aquaculture; 

70.020.(1) (B) Water Recreation 

(i) Contact recreation, 

(ii) Secondary recreation; 

70.020.(1) (C) Growth and propagation of 

fish, shellfish, other aquatic life, and 

wildlife 

70.020.(2) (A) Marine Water 

70.020.(2) (A) Water Supply 

(i) Aquaculture, 

70.020.(2) (B) Water Recreation 

(i) contact recreation, 

(ii) secondary recreation; 

70.020.(2) (C) Growth and propagation of fish, 

shellfish, other aquatic life, and wildlife; 

70.020.(2) (D) Harvesting for consumption of 

raw mollusks or other raw aquatic life. 

(ii) The following criteria from the 

matrix in paragraph (b)(1) of this section apply to the use classifications 

identified in paragraph (d)(12)(i) of this 

section: 

Use classification Applicable criteria 

(1)(A)(i) ........................................................................................ Column D1—#s 16, 18–21, 23, 26, 27, 29, 30, 32, 37, 38, 42–

44, 53, 55, 59–62, 64, 66, 68, 73, 74, 78, 82, 85, 88, 89, 

91–93, 96, 98, 102–105, 107–111, 117–126. 

(1)(A)(iii) ....................................................................................... Column D2—#s 14, 16, 18–21, 22, 23, 26, 27, 29, 30, 32, 37, 

38, 42–44, 46, 53, 54, 55, 59–62, 64, 66, 68, 73, 74, 78, 82, 

85, 88–93, 95, 96, 98, 102–105, 107–111, 115–126. 

(1)(B)(i), (1)(B)(ii), (1)(C) ............................................................. Column D2—#s 14, 16, 18–21, 22, 23, 26, 27, 29, 30, 32, 37, 

38, 42–44, 46, 53, 54, 55, 59–62, 64, 66, 68, 73, 74, 78, 82, 

85, 88–93, 95, 96, 98, 102–105, 107–111, 115–126. 

(2)(A)(i), (2)(B)(i), and (2)(B)ii, (2)(C), (2)(D) .............................. Column D2—#s 14, 16, 18–21, 22, 23, 26, 27, 29, 30, 32, 37, 

38, 42–44, 46, 53, 54, 55, 59–62, 64, 66, 68, 73, 74, 78, 82, 

85, 88–93, 95, 96, 98, 102–105, 107–111, 115–126. 

(iii) The human health criteria shall 

be applied at the State-proposed risk 

level of 10¥5. To determine appropriate 

value for carcinogens, see footnote c in 

the criteria matrix in paragraph (b)(1) 

of this section. 

(13) [Reserved] 

(14) Washington, EPA Region 10. (i) All 

waters assigned to the following use 

classifications in the Washington Administrative Code (WAC), Chapter 173–

201 (i.e., identified in WAC 173–201–045) 

are subject to the criteria in paragraph 

(d)(14)(ii) of this section, without exception: 

173–201–045 

Fish and Shellfish 

Fish 

Water Supply (domestic) 

Recreation 

(ii) The following criteria from the 

matrix in paragraph (b)(1) of this section apply to the use classifications 

identified in paragraph (d)(14)(i) of this 

section: 

Use classification Applicable criteria 

Fish and Shellfish; Fish ............................................................... These classifications are assigned the criteria in: Column D2—

all. 

Water Supply (domestic) ............................................................. These classifications are assigned the criteria in: Column D1—

all. 

Recreation ................................................................................... This classification is assigned the criteria in: Column D2—Marine waters and freshwaters not protected for domestic water 

supply. 

(iii) The human health criteria shall 

be applied at the State proposed risk 

level of 10¥6. 

[57 FR 60910, Dec. 22, 1992] 

EDITORIAL NOTE: For FEDERAL REGISTER citations affecting § 131.36, see the List of CFR 

Sections Affected, which appears in the 

Finding Aids section of the printed volume 

and on GPO Access. 

§ 131.37 California. 

(a) Additional criteria. The following 

criteria are applicable to waters specified in the Water Quality Control Plan 

for Salinity for the San Francisco Bay/ 

Sacramento-San Joaquin Delta Estuary, adopted by the California State 

Water Resources Control Board in 

State Board Resolution No. 91–34 on 

May 1, 1991: 


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§ 131.37 40 CFR Ch. I (7–1–08 Edition) 

(1) Estuarine habitat criteria. (i) General rule. (A) Salinity (measured at the 

surface) shall not exceed 2640 

micromhos/centimeter specific conductance at 25 °C (measured as a 14-day 

moving average) at the Confluence of 

the Sacramento and San Joaquin Rivers throughout the period each year 

from February 1 through June 30, and 

shall not exceed 2640 micromhos/centimeter specific conductance at 25 °C 

(measured as a 14-day moving average) 

at the specific locations noted in Table 

1 near Roe Island and Chipps Island for 

the number of days each month in the 

February 1 to June 30 period computed 

by reference to the following formula: 

Number of days required in Month X = 

Total number of days in Month×* (1 

¥ 1/(1+eK) 

where 

K = A + (B*natural logarithm of the previous 

month’s 8-River Index); 

A and B are determined by reference to 

Table 1 for the Roe Island and Chipps Island locations; 

x is the calendar month in the February 1 to 

June 30 period; 

and e is the base of the natural (or Napierian) logarithm. 

Where the number of days computed in 

this equation in paragraph (a)(1)(i)(A) 

of this section shall be rounded to the 

nearest whole number of days. When 

the previous month’s 8-River Index is 

less than 500,000 acre-feet, the number 

of days required for the current month 

shall be zero. 

TABLE 1. CONSTANTS APPLICABLE TO EACH OF THE MONTHLY EQUATIONS TO DETERMINE MONTHLY

REQUIREMENTS DESCRIBED. 

Month X 

Chipps Island Roe Island (if triggered) 

A B A B 

Feb ........................................................................................ ¥1 ¥1 ¥14.36 +2.068 

Mar ........................................................................................ ¥105.16 +15.943 ¥20.79 +2.741 

Apr ......................................................................................... ¥47.17 +6.441 ¥28.73 +3.783 

May ........................................................................................ ¥94.93 +13.662 ¥54.22 +6.571 

June ....................................................................................... ¥81.00 +9.961 ¥92.584 +10.699 

1 Coefficients for A and B are not provided at Chipps Island for February, because the 2640 micromhos/cm specific conductance criteria must be maintained at Chipps Island throughout February under all historical 8-River Index values for January. 

(B) The Roe Island criteria apply at 

the salinity measuring station maintained by the U.S. Bureau of Reclamation at Port Chicago (km 64). The 

Chipps Island criteria apply at the Mallard Slough Monitoring Site, Station 

D–10 (RKI RSAC–075) maintained by 

the California Department of Water 

Resources. The Confluence criteria 

apply at the Collinsville Continuous 

Monitoring Station C–2 (RKI RSAC–

081) maintained by the California Department of Water Resources. 

(ii) Exception. The criteria at Roe Island shall be required for any given 

month only if the 14-day moving average salinity at Roe Island falls below 

2640 micromhos/centimeter specific 

conductance on any of the last 14 days 

of the previous month. 

(2) Fish migration criteria—(i) General 

rule—(A) Sacramento River. Measured 

Fish Migration criteria values for the 

Sacramento River shall be at least the 

following: 

At temperatures less than below 61 °F: 

SRFMC = 1.35 

At temperatures between 61 °F and 72 

°F: SRFMC = 6.96–.092 * Fahrenheit 

temperature 

At temperatures greater than 72 °F: 

SRFMC = 0.34 

where SRFMC is the Sacramento River 

Fish Migration criteria value. Temperature shall be the water temperature at release of tagged salmon smolts 

into the Sacramento River at Miller 

Park. 

(B) San Joaquin River. Measured Fish 

Migration criteria values on the San 

Joaquin River shall be at least the following: 

For years in which the SJVIndex is 

>2.5: SJFMC = (¥0.012) + 

0.184*SJVIndex 

In other years: SJFMC = 0.205 + 

0.0975*SJVIndex 


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Environmental Protection Agency § 131.37 

where SJFMC is the San Joaquin River 

Fish Migration criteria value, and 

SJVIndex is the San Joaquin Valley 

Index in million acre feet (MAF) 

(ii) Computing fish migration criteria 

values for Sacramento River. In order to 

assess fish migration criteria values for 

the Sacramento River, tagged fall-run 

salmon smolts will be released into the 

Sacramento River at Miller Park and 

captured at Chipps Island, or alternatively released at Miller Park and 

Port Chicago and recovered from the 

ocean fishery, using the methodology 

described in this paragraph (a)(2)(ii). 

An alternative methodology for computing fish migration criteria values 

can be used so long as the revised 

methodology is calibrated with the 

methodology described in this paragraph (a)(2)(ii) so as to maintain the 

validity of the relative index values. 

Sufficient releases shall be made each 

year to provide a statistically reliable 

verification of compliance with the criteria. These criteria will be considered 

attained when the sum of the differences between the measured experimental value and the stated criteria 

value (i.e., measured value minus stated value) for each experimental release 

conducted over a three year period (the 

current year and the previous two 

years) shall be greater than or equal to 

zero. Fish for release are to be tagged 

at the hatchery with coded-wire tags, 

and fin clipped. Approximately 50,000 to 

100,000 fish of smolt size (size greater 

than 75 mm) are released for each survival index estimate, depending on expected mortality. As a control for the 

ocean recovery survival index, one or 

two groups per season are released at 

Benecia or Pt. Chicago. From each upstream release of tagged fish, fish are 

to be caught over a period of one to 

two weeks at Chipps Island. Daylight 

sampling at Chipps Island with a 9.1 by 

7.9 m, 3.2 mm cod end, midwater trawl 

is begun 2 to 3 days after release. When 

the first fish is caught, full-time trawling 7 days a week should begin. Each 

day’s trawling consists of ten 20 

minute tows generally made against 

the current, and distributed equally 

across the channel. 

(A) The Chipps Island smolt survival 

index is calculated as: 

SSI=R÷MT(0.007692) 

where 

R=number of recaptures of tagged fish 

M=number of marked (tagged) fish released 

T=proportion of time sampled vs total time 

tagged fish were passing the site (i.e. time 

between first and last tagged fish recovery) 

Where the value 0.007692 is the proportion of the channel width fished by the 

trawl, and is calculated as trawl width/ 

channel width. 

(B) Recoveries of tagged fish from 

the ocean salmon fishery two to four 

years after release are also used to calculate a survival index for each release. Smolt survival indices from 

ocean recoveries are calculated as: 

OSI=R1/M1÷R2/M2

where 

R1=number of tagged adults recovered from 

the upstream release 

M1=number released upstream 

R2=number of tagged adults recovered from 

the Port Chicago release 

M2=number released at Port Chicago 

(1) The number of tagged adults recovered from the ocean fishery is provided by the Pacific States Marine 

Fisheries Commission, which maintains a port sampling program. 

(2) [Reserved] 

(iii) Computing fish migration criteria 

values for San Joaquin River. In order to 

assess annual fish migration criteria 

values for the San Joaquin River, 

tagged salmon smolts will be released 

into the San Joaquin River at Mossdale 

and captured at Chipps Island, or alternatively released at Mossdale and Port 

Chicago and recovered from the ocean 

fishery, using the methodology described in paragraph (a)(2)(iii). An alternative methodology for computing 

fish migration criteria values can be 

used so long as the revised methodology is calibrated with the methodology described below so as to maintain the validity of the relative index 

values. Sufficient releases shall be 

made each year to provide a statistically reliable estimate of the SJFMC 

for the year. These criteria will be considered attained when the sum of the 

differences between the measured experimental value and the stated criteria value (i.e., measured value minus 

stated value) for each experimental release conducted over a three year period (the current year and the previous 


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§ 131.37 40 CFR Ch. I (7–1–08 Edition) 

two years) shall be greater than or 

equal to zero. 

(A) Fish for release are to be tagged 

at the hatchery with coded-wire tags, 

and fin clipped. Approximately 50,000 to 

100,000 fish of smolt size (size greater 

than 75 mm) are released for each survival index estimate, depending on expected mortality. As a control for the 

ocean recovery survival index, one or 

two groups per season are released at 

Benicia or Pt. Chicago. From each upstream release of tagged fish, fish are 

to be caught over a period of one to 

two weeks at Chipps Island. Daylight 

sampling at Chipps Island with a 9.1 by 

7.9 m, 3.2 mm cod end, midwater trawl 

is begun 2 to 3 days after release. When 

the first fish is caught, full-time trawling 7 days a week should begin. Each 

day’s trawling consists of ten 20 

minute tows generally made against 

the current, and distributed equally 

across the channel. 

(B) The Chipps Island smolt survival 

index is calculated as: 

SSI=R÷MT(0.007692) 

where 

R=number of recaptures of tagged fish 

M=number of marked (tagged) fish released 

T=proportion of time sampled vs total time 

tagged fish were passing the site (i.e. time 

between first and last tagged fish recovery) 

Where the value 0.007692 is the proportion of the channel width fished by the 

trawl, and is calculated as trawl width/ 

channel width. 

(C) Recoveries of tagged fish from the 

ocean salmon fishery two to four years 

after release are also used to calculate 

a survival index for each release. Smolt 

survival indices from ocean recoveries 

are calculated as: 

OSI=R1/M1 ÷ R2/M2

where 

R1=number of tagged adults recovered from 

the upstream release 

M1=number released upstream 

R2=number of tagged adults recovered from 

the Port Chicago release 

M2=number released at Port Chicago 

(1) The number of tagged adults recovered from the ocean fishery is provided by the Pacific States Marine 

Fisheries Commission, which maintains a port sampling program. 

(2) [Reserved] 

(3) Suisun marsh criteria. (i) Water 

quality conditions sufficient to support 

a natural gradient in species composition and wildlife habitat characteristic 

of a brackish marsh throughout all elevations of the tidal marshes bordering 

Suisun Bay shall be maintained. Water 

quality conditions shall be maintained 

so that none of the following occurs: 

Loss of diversity; conversion of brackish marsh to salt marsh; for animals, 

decreased population abundance of 

those species vulnerable to increased 

mortality and loss of habitat from increased water salinity; or for plants, 

significant reduction in stature or percent cover from increased water or soil 

salinity or other water quality parameters. 

(ii) [Reserved] 

(b) Revised criteria. The following criteria are applicable to state waters 

specified in Table 1–1, at Section (C)(3) 

(‘‘Striped Bass—Salinity : 3. Prisoners 

Point—Spawning) of the Water Quality 

Control Plan for Salinity for the San 

Francisco Bay—Sacramento/San Joaquin Delta Estuary, adopted by the 

California State Water Resources Control Board in State Board Resolution 

No. 91–34 on May 1, 1991: 


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Location Sampling site Nos (I–- 

A/RKI) Parameter Description Index type San Joaquin Valley Index Dates Values 

San Joaquin 

River at 

Jersey 

Point, San 

Andreas 

Landing, 

Prisoners 

Point, 

Buckley 

Cove, 

Rough 

and 

Ready Island, 

Brandt 

Bridge, 

Mossdale, 

and 

Vernalis.

D15/RSAN018, 

C4/RSAN032, 

D29/RSAN038, 

P8/RSAN056, 

-/RSAN062, 

C6/RSAN073, 

C7/RSAN087, 

C10/RSAN112 

Specific .....

Conductance.

@ 25 °C ...

14-day running average of 

mean 

daily for 

the period not 

more 

than 

value 

shown, in 

mmhos.

Not Applicable.>2.5 MAF April 1 to 

May 31.

0.44 micromhos. 

San Joaquin 

River at 

Jersey 

Point, San 

Andreas 

Landing 

and Prisoners 

Point.

D15/RSAN018, 

C4/RSAN032, 

D29/RSAN038 

Specific 

Conductance.

14-day running average of 

mean 

daily for 

the period not 

more 

than 

value 

shown, in 

mmhos.

Not Applicable.≤2.5 MAF April 1 to 

May 31.

0.44 micromhos. 

(c) Definitions. Terms used in paragraphs (a) and (b) of this section, shall 

be defined as follows: 

(1) Water year. A water year is the 

twelve calendar months beginning October 1. 

(2) 8-River Index. The flow determinations are made and are published by 

the California Department of Water 

Resources in Bulletin 120. The 8-River 

Index shall be computed as the sum of 

flows at the following stations: 

(i) Sacramento River at Band Bridge, 

near Red Bluff; 

(ii) Feather River, total inflow to 

Oroville Reservoir; 

(iii) Yuba River at Smartville; 

(iv) American River, total inflow to 

Folsom Reservoir; 

(v) Stanislaus River, total inflow to 

New Melones Reservoir; 

(vi) Tuolumne River, total inflow to 

Don Pedro Reservoir; 

(vii) Merced River, total inflow to 

Exchequer Reservoir; and 

(viii) San Joaquin River, total inflow 

to Millerton Lake. 

(3) San Joaquin Valley Index. (i) The 

San Joaquin Valley Index is computed 

according to the following formula: 

ISJ=0.6X+0.2Y and 0.2Z 

where 

ISJ=San Joaquin Valley Index 

X=Current year’s April-July San Joaquin 

Valley unimpaired runoff 

Y=Current year’s October-March San Joaquin Valley unimpaired runoff 

Z=Previous year’s index in MAF, not to exceed 0.9 MAF 

(ii) Measuring San Joaquin Valley 

unimpaired runoff. San Joaquin Valley 

unimpaired runoff for the current 

water year is a forecast of the sum of 

the following locations: Stanislaus 

River, total flow to New Melones Reservoir; Tuolumne River, total inflow to 

Don Pedro Reservoir; Merced River, 

total flow to Exchequer Reservoir; San 

Joaquin River, total inflow to 

Millerton Lake. 

(4) Salinity. Salinity is the total concentration of dissolved ions in water. It 

shall be measured by specific conductance in accordance with the procedures 

set forth in 40 CFR 136.3, Table 1B, Parameter 64. 

[60 FR 4707, Jan. 24, 1995] 


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§ 131.38 40 CFR Ch. I (7–1–08 Edition) 

§ 131.38 Establishment of numeric criteria for priority toxic pollutants 

for the State of California. 

(a) Scope. This section promulgates 

criteria for priority toxic pollutants in 

the State of California for inland surface waters and enclosed bays and estuaries. This section also contains a compliance schedule provision. 

(b)(1) Criteria for Priority Toxic Pollutants in the State of California as described in the following table: 


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FOOTNOTES TO TABLE IN PARAGRAPH (b)(1): 

a. Criteria revised to reflect the Agency 

q1* or RfD, as contained in the Integrated 

Risk Information System (IRIS) as of October 1, 1996. The fish tissue bioconcentration 

factor (BCF) from the 1980 documents was retained in each case. 

b. Criteria apply to California waters except for those waters subject to objectives in 

Tables III–2A and III–2B of the San Francisco 

Regional Water Quality Control Board’s 

(SFRWQCB) 1986 Basin Plan that were adopted by the SFRWQCB and the State Water Resources Control Board, approved by EPA, 

and which continue to apply. For copper and 

nickel, criteria apply to California waters 

except for waters south of Dumbarton Bridge 

in San Francisco Bay that are subject to the 

objectives in the SFRWQCB’s Basin Plan as 

amended by SFRWQCB Resolution R2–2002–

0061, dated May 22, 2002, and approved by the 

State Water Resources Control Board. EPA 

approved the aquatic life site-specific objectives on January 21, 2003. The copper and 

nickel aquatic life site-specific objectives 

contained in the amended Basin Plan apply 

instead. 

c. Criteria are based on carcinogenicity of 

10 (-6) risk. 

d. Criteria Maximum Concentration (CMC) 

equals the highest concentration of a pollutant to which aquatic life can be exposed for 

a short period of time without deleterious effects. Criteria Continuous Concentration 

(CCC) equals the highest concentration of a 

pollutant to which aquatic life can be exposed for an extended period of time (4 days) 

without deleterious effects. ug/L equals 

micrograms per liter. 

e. Freshwater aquatic life criteria for metals are expressed as a function of total hardness (mg/L) in the water body. The equations 

are provided in matrix at paragraph (b)(2) of 

this section. Values displayed above in the 

matrix correspond to a total hardness of 100 

mg/l. 

f. Freshwater aquatic life criteria for 

pentachlorophenol are expressed as a function of pH, and are calculated as follows: 


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Values displayed above in the matrix correspond to a pH of 7.8. CMC = 

exp(1.005(pH)¥4.869). CCC = 

exp(1.005(pH)¥5.134). 

g. This criterion is based on 304(a) aquatic 

life criterion issued in 1980, and was issued in 

one of the following documents: Aldrin/ 

Dieldrin (EPA 440/5–80–019), Chlordane (EPA 

440/5–80–027), DDT (EPA 440/5–80–038), 

Endosulfan (EPA 440/5–80–046), Endrin (EPA 

440/5–80–047), Heptachlor (440/5–80–052), 

Hexachlorocyclohexane (EPA 440/5–80–054), 

Silver (EPA 440/5–80–071). The Minimum Data 

Requirements and derivation procedures 

were different in the 1980 Guidelines than in 

the 1985 Guidelines. For example, a ‘‘CMC’’

derived using the 1980 Guidelines was derived 

to be used as an instantaneous maximum. If 

assessment is to be done using an averaging 

period, the values given should be divided by 

2 to obtain a value that is more comparable 

to a CMC derived using the 1985 Guidelines. 

h. These totals simply sum the criteria in 

each column. For aquatic life, there are 23 

priority toxic pollutants with some type of 

freshwater or saltwater, acute or chronic criteria. For human health, there are 92 priority toxic pollutants with either ‘‘water + 

organism’’ or ‘‘organism only’’ criteria. Note 

that these totals count chromium as one pollutant even though EPA has developed criteria based on two valence states. In the matrix, EPA has assigned numbers 5a and 5b to 

the criteria for chromium to reflect the fact 

that the list of 126 priority pollutants includes only a single listing for chromium. 

i. Criteria for these metals are expressed as 

a function of the water-effect ratio, WER, as 

defined in paragraph (c) of this section. CMC 

= column B1 or C1 value×WER; CCC = column 

B2 or C2 value×WER. 

j. No criterion for protection of human 

health from consumption of aquatic organisms (excluding water) was presented in the 

1980 criteria document or in the 1986 Quality 

Criteria for Water. Nevertheless, sufficient 

information was presented in the 1980 document to allow a calculation of a criterion, 

even though the results of such a calculation 

were not shown in the document. 

k. The CWA 304(a) criterion for asbestos is 

the MCL. 

l. [Reserved] 

m. These freshwater and saltwater criteria 

for metals are expressed in terms of the dissolved fraction of the metal in the water column. Criterion values were calculated by 

using EPA’s Clean Water Act 304(a) guidance 

values (described in the total recoverable 

fraction) and then applying the conversion 

factors in § 131.36(b)(1) and (2). 

n. EPA is not promulgating human health 

criteria for these contaminants. However, 

permit authorities should address these contaminants in NPDES permit actions using 

the State’s existing narrative criteria for 

toxics. 

o. These criteria were promulgated for specific waters in California in the National 

Toxics Rule (‘‘NTR’’), at § 131.36. The specific 

waters to which the NTR criteria apply include: Waters of the State defined as bays or 

estuaries and waters of the State defined as 

inland, i.e., all surface waters of the State 

not ocean waters. These waters specifically 

include the San Francisco Bay upstream to 

and including Suisun Bay and the Sacramento-San Joaquin Delta. This section 

does not apply instead of the NTR for this 

criterion. 

p. A criterion of 20 ug/l was promulgated 

for specific waters in California in the NTR 

and was promulgated in the total recoverable form. The specific waters to which the 

NTR criterion applies include: Waters of the 

San Francisco Bay upstream to and including Suisun Bay and the Sacramento-San 

Joaquin Delta; and waters of Salt Slough, 

Mud Slough (north) and the San Joaquin 

River, Sack Dam to the mouth of the Merced 

River. This section does not apply instead of 

the NTR for this criterion. The State of California adopted and EPA approved a site specific criterion for the San Joaquin River, 

mouth of Merced to Vernalis; therefore, this 

section does not apply to these waters. 

q. This criterion is expressed in the total 

recoverable form. This criterion was promulgated for specific waters in California in the 

NTR and was promulgated in the total recoverable form. The specific waters to which the 

NTR criterion applies include: Waters of the 

San Francisco Bay upstream to and including Suisun Bay and the Sacramento-San 

Joaquin Delta; and waters of Salt Slough, 

Mud Slough (north) and the San Joaquin 

River, Sack Dam to Vernalis. This criterion 

does not apply instead of the NTR for these 

waters. This criterion applies to additional 

waters of the United States in the State of 

California pursuant to 40 CFR 131.38(c). The 

State of California adopted and EPA approved a site-specific criterion for the Grassland Water District, San Luis National Wildlife Refuge, and the Los Banos State Wildlife 

Refuge; therefore, this criterion does not 

apply to these waters. 

r. These criteria were promulgated for specific waters in California in the NTR. The 

specific waters to which the NTR criteria 

apply include: Waters of the State defined as 

bays or estuaries including the San Francisco Bay upstream to and including Suisun 

Bay and the Sacramento-San Joaquin Delta. 

This section does not apply instead of the 

NTR for these criteria. 

s. These criteria were promulgated for specific waters in California in the NTR. The 

specific waters to which the NTR criteria 

apply include: Waters of the Sacramento-San 

Joaquin Delta and waters of the State defined as inland ( i.e., all surface waters of the 

State not bays or estuaries or ocean) that include a MUN use designation. This section 


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Environmental Protection Agency § 131.38 

does not apply instead of the NTR for these 

criteria. 

t. These criteria were promulgated for specific waters in California in the NTR. The 

specific waters to which the NTR criteria 

apply include: Waters of the State defined as 

bays and estuaries including San Francisco 

Bay upstream to and including Suisun Bay 

and the Sacramento-San Joaquin Delta; and 

waters of the State defined as inland (i.e., all 

surface waters of the State not bays or estuaries or ocean) without a MUN use designation. This section does not apply instead of 

the NTR for these criteria. 

u. PCBs are a class of chemicals which include aroclors 1242, 1254, 1221, 1232, 1248, 1260, 

and 1016, CAS numbers 53469219, 11097691, 

11104282, 11141165, 12672296, 11096825, and 

12674112, respectively. The aquatic life criteria apply to the sum of this set of seven 

aroclors. 

v. This criterion applies to total PCBs, 

e.g., the sum of all congener or isomer or 

homolog or aroclor analyses. 

w. This criterion has been recalculated 

pursuant to the 1995 Updates: Water Quality 

Criteria Documents for the Protection of 

Aquatic Life in Ambient Water, Office of 

Water, EPA–820-B–96–001, September 1996. 

See also Great Lakes Water Quality Initiative Criteria Documents for the Protection 

of Aquatic Life in Ambient Water, Office of 

Water, EPA–80–B–95–004, March 1995. 

x. The State of California has adopted and 

EPA has approved site specific criteria for 

the Sacramento River (and tributaries) 

above Hamilton City; therefore, these criteria do not apply to these waters. 

GENERAL NOTES TO TABLE IN PARAGRAPH

(b)(1) 

1. The table in this paragraph (b)(1) lists 

all of EPA’s priority toxic pollutants whether or not criteria guidance are available. 

Blank spaces indicate the absence of national section 304(a) criteria guidance. Because of variations in chemical nomenclature systems, this listing of toxic pollutants does not duplicate the listing in Appendix A to 40 CFR Part 423–126 Priority Pollutants. EPA has added the Chemical Abstracts 

Service (CAS) registry numbers, which provide a unique identification for each chemical. 

2. The following chemicals have 

organoleptic-based criteria recommendations that are not included on this chart: 

zinc, 3-methyl-4-chlorophenol. 

3. Freshwater and saltwater aquatic life 

criteria apply as specified in paragraph (c)(3) 

of this section. 

(2) Factors for Calculating Metals 

Criteria. Final CMC and CCC values 

should be rounded to two significant 

figures. 

(i) CMC = WER × (Acute Conversion 

Factor) × (exp{mA[1n (hardness)]+bA}) 

(ii) CCC = WER × (Chronic Conversion 

Factor) × (exp{mC[ln(hardness)]+bC}) 

(iii) Table 1 to paragraph (b)(2) of this 

section: 

Metal mA bA mC bC

Cadmium ....................................................................... 1 .128 ¥3 .6867 0 .7852 ¥2 .715 

Copper ........................................................................... 0 .9422 ¥1 .700 0 .8545 ¥1 .702 

Chromium (III) ............................................................... 0 .8190 3 .688 0 .8190 1 .561 

Lead .............................................................................. 1 .273 ¥1 .460 1 .273 ¥4 .705 

Nickel ............................................................................. 0 .8460 2 .255 0 .8460 0 .0584 

Silver ............................................................................. 1 .72 ¥6 .52 

Zinc ................................................................................ 0 .8473 0 .884 0 .8473 0 .884 

Note to Table 1: The term ‘‘exp’’ represents the base e exponential function. 

(iv) Table 2 to paragraph (b)(2) of this 

section: 

Metal 

Conversion factor (CF) for 

freshwater acute 

criteria 

CF for freshwater chronic 

criteria 

CF for saltwater 

acute criteria 

CF a for saltwater chronic 

criteria 

Antimony ..................................................................... (d) (d) (d) (d) 

Arsenic ........................................................................ 1 .000 1 .000 1 .000 1 .000 

Beryllium ...................................................................... (d) (d) (d) (d) 

Cadmium ..................................................................... b 0 .944 b 0 .909 0 .994 0 .994 

Chromium (III) ............................................................. 0 .316 0 .860 (d) (d) 

Chromium (VI) ............................................................. 0 .982 0 .962 0 .993 0 .993 

Copper ......................................................................... 0 .960 0 .960 0 .83 0 .83 

Lead ............................................................................ b 0 .791 b 0 .791 0 .951 0 .951 

Mercury ....................................................................... ............................ .......................... .......................... ..........................

Nickel ........................................................................... 0 .998 0 .997 0 .990 0 .990 

Selenium ..................................................................... ............................ (c) 0 .998 0 .998 


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Metal 

Conversion factor (CF) for 

freshwater acute 

criteria 

CF for freshwater chronic 

criteria 

CF for saltwater 

acute criteria 

CF a for saltwater chronic 

criteria 

Silver ........................................................................... 0 .85 (d) 0 .85 (d) 

Thallium ....................................................................... (d) (d) (d) (d) 

Zinc .............................................................................. 0 .978 0 .986 0 .946 0 .946 

FOOTNOTES TO TABLE 2 OF PARAGRAPH (b)(2): a Conversion Factors for chronic marine criteria are not currently available. Conversion Factors for acute marine criteria have been used for both acute and chronic marine criteria. b Conversion Factors for these pollutants in freshwater are hardness dependent. CFs are based on a hardness of 100 mg/l as 

calcium carbonate (CaCO3). Other hardness can be used; CFs should be recalculated using the equations in table 3 to paragraph (b)(2) of this section. cBioaccumulative compound and inappropriate to adjust to percent dissolved. 

dEPA has not published an aquatic life criterion value. 

NOTE TO TABLE 2 OF PARAGRAPH (b)(2): The 

term ‘‘Conversion Factor’’ represents the 

recommended conversion factor for converting a metal criterion expressed as the 

total recoverable fraction in the water column to a criterion expressed as the dissolved 

fraction in the water column. See ‘‘Office of 

Water Policy and Technical Guidance on Interpretation and Implementation of Aquatic 

Life Metals Criteria’’, October 1, 1993, by 

Martha G. Prothro, Acting Assistant Administrator for Water available from Water Resource Center, USEPA, Mailcode RC4100, M 

Street SW, Washington, DC 20460 and the 

note to § 131.36(b)(1). 

(v) Table 3 to paragraph (b)(2) of this 

section: 

Acute Chronic 

Cadmium ......................... CF=1.136672—[(ln {hardness}) (0.041838)] ....... CF = 1.101672—[(ln {hardness})(0.041838)] 

Lead ................................ CF=1.46203—[(ln {hardness})(0.145712)] .......... CF = 1.46203—[(ln {hardness})(0.145712)] 

(c) Applicability. (1) The criteria in 

paragraph (b) of this section apply to 

the State’s designated uses cited in 

paragraph (d) of this section and apply 

concurrently with any criteria adopted 

by the State, except when State regulations contain criteria which are more 

stringent for a particular parameter 

and use, or except as provided in footnotes p, q, and x to the table in paragraph (b)(1) of this section. 

(2) The criteria established in this 

section are subject to the State’s general rules of applicability in the same 

way and to the same extent as are 

other Federally-adopted and Stateadopted numeric toxics criteria when 

applied to the same use classifications 

including mixing zones, and low flow 

values below which numeric standards 

can be exceeded in flowing fresh waters. 

(i) For all waters with mixing zone 

regulations or implementation procedures, the criteria apply at the appropriate locations within or at the 

boundary of the mixing zones; otherwise the criteria apply throughout the 

water body including at the point of 

discharge into the water body. 

(ii) The State shall not use a low flow 

value below which numeric standards 

can be exceeded that is less stringent 

than the flows in Table 4 to paragraph 

(c)(2) of this section for streams and 

rivers. 

(iii) Table 4 to paragraph (c)(2) of this 

section: 

Criteria Design flow 

Aquatic Life Acute Criteria 

(CMC).

1 Q 10 or 1 B 3 

Aquatic Life Chronic Criteria 

(CCC).

7 Q 10 or 4 B 3 

Human Health Criteria ........... Harmonic Mean Flow 

NOTE TO TABLE 4 OF PARAGRAPH (c)(2): 1. 

CMC (Criteria Maximum Concentration) is 

the water quality criteria to protect against 

acute effects in aquatic life and is the highest instream concentration of a priority 

toxic pollutant consisting of a short-term 

average not to be exceeded more than once 

every three years on the average. 

2. CCC (Continuous Criteria Concentration) 

is the water quality criteria to protect 

against chronic effects in aquatic life and is 

the highest in stream concentration of a priority toxic pollutant consisting of a 4-day 

average not to be exceeded more than once 

every three years on the average. 

3. 1 Q 10 is the lowest one day flow with an 

average recurrence frequency of once in 10 

years determined hydrologically. 


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4. 1 B 3 is biologically based and indicates 

an allowable exceedence of once every 3 

years. It is determined by EPA’s computerized method (DFLOW model). 

5. 7 Q 10 is the lowest average 7 consecutive 

day low flow with an average recurrence frequency of once in 10 years determined 

hydrologically. 

6. 4 B 3 is biologically based and indicates 

an allowable exceedence for 4 consecutive 

days once every 3 years. It is determined by 

EPA’s computerized method (DFLOW 

model). 

(iv) If the State does not have such a 

low flow value below which numeric 

standards do not apply, then the criteria included in paragraph (d) of this 

section apply at all flows. 

(v) If the CMC short-term averaging 

period, the CCC four-day averaging period, or once in three-year frequency is 

inappropriate for a criterion or the site 

to which a criterion applies, the State 

may apply to EPA for approval of an 

alternative averaging period, frequency, and related design flow. The 

State must submit to EPA the bases 

for any alternative averaging period, 

frequency, and related design flow. Before approving any change, EPA will 

publish for public comment, a document proposing the change. 

(3) The freshwater and saltwater 

aquatic life criteria in the matrix in 

paragraph (b)(1) of this section apply as 

follows: 

(i) For waters in which the salinity is 

equal to or less than 1 part per thousand 95% or more of the time, the applicable criteria are the freshwater criteria in Column B; 

(ii) For waters in which the salinity 

is equal to or greater than 10 parts per 

thousand 95% or more of the time, the 

applicable criteria are the saltwater 

criteria in Column C except for selenium in the San Francisco Bay estuary 

where the applicable criteria are the 

freshwater criteria in Column B (refer 

to footnotes p and q to the table in 

paragraph (b)(1) of this section); and 

(iii) For waters in which the salinity 

is between 1 and 10 parts per thousand 

as defined in paragraphs (c)(3)(i) and 

(ii) of this section, the applicable criteria are the more stringent of the 

freshwater or saltwater criteria. However, the Regional Administrator may 

approve the use of the alternative 

freshwater or saltwater criteria if scientifically defensible information and 

data demonstrate that on a site-specific basis the biology of the water 

body is dominated by freshwater aquatic life and that freshwater criteria are 

more appropriate; or conversely, the 

biology of the water body is dominated 

by saltwater aquatic life and that saltwater criteria are more appropriate. 

Before approving any change, EPA will 

publish for public comment a document proposing the change. 

(4) Application of metals criteria. (i) 

For purposes of calculating freshwater 

aquatic life criteria for metals from 

the equations in paragraph (b)(2) of 

this section, for waters with a hardness 

of 400 mg/l or less as calcium carbonate, the actual ambient hardness of 

the surface water shall be used in those 

equations. For waters with a hardness 

of over 400 mg/l as calcium carbonate, a 

hardness of 400 mg/l as calcium carbonate shall be used with a default 

Water-Effect Ratio (WER) of 1, or the 

actual hardness of the ambient surface 

water shall be used with a WER. The 

same provisions apply for calculating 

the metals criteria for the comparisons 

provided for in paragraph (c)(3)(iii) of 

this section. 

(ii) The hardness values used shall be 

consistent with the design discharge 

conditions established in paragraph 

(c)(2) of this section for design flows 

and mixing zones. 

(iii) The criteria for metals (compounds #1—#13 in the table in paragraph (b)(1) of this section) are expressed as dissolved except where otherwise noted. For purposes of calculating aquatic life criteria for metals 

from the equations in footnote i to the 

table in paragraph (b)(1) of this section 

and the equations in paragraph (b)(2) of 

this section, the water effect ratio is 

generally computed as a specific pollutant’s acute or chronic toxicity value 

measured in water from the site covered by the standard, divided by the respective acute or chronic toxicity 

value in laboratory dilution water. To 

use a water effect ratio other than the 

default of 1, the WER must be determined as set forth in Interim Guidance 

on Determination and Use of Water Effect Ratios, U.S. EPA Office of Water, 


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§ 131.38 40 CFR Ch. I (7–1–08 Edition) 

EPA–823–B–94–001, February 1994, or alternatively, other scientifically defensible methods adopted by the State as 

part of its water quality standards program and approved by EPA. For calculation of criteria using site-specific 

values for both the hardness and the 

water effect ratio, the hardness used in 

the equations in paragraph (b)(2) of 

this section must be determined as required in paragraph (c)(4)(ii) of this 

section. Water hardness must be calculated from the measured calcium and 

magnesium ions present, and the ratio 

of calcium to magnesium should be approximately the same in standard laboratory toxicity testing water as in the 

site water. 

(d)(1) Except as specified in paragraph (d)(3) of this section, all waters 

assigned any aquatic life or human 

health use classifications in the Water 

Quality Control Plans for the various 

Basins of the State (‘‘Basin Plans’’) 

adopted by the California State Water 

Resources Control Board (‘‘SWRCB’’), 

except for ocean waters covered by the 

Water Quality Control Plan for Ocean 

Waters of California (‘‘Ocean Plan’’) 

adopted by the SWRCB with resolution 

Number 90–27 on March 22, 1990, are 

subject to the criteria in paragraph 

(d)(2) of this section, without exception. These criteria apply to waters 

identified in the Basin Plans. More particularly, these criteria apply to waters identified in the Basin Plan chapters designating beneficial uses for waters within the region. Although the 

State has adopted several use designations for each of these waters, for purposes of this action, the specific standards to be applied in paragraph (d)(2) of 

this section are based on the presence 

in all waters of some aquatic life designation and the presence or absence of 

the MUN use designation (municipal 

and domestic supply). (See Basin Plans 

for more detailed use definitions.) 

(2) The criteria from the table in 

paragraph (b)(1) of this section apply to 

the water and use classifications defined in paragraph (d)(1) of this section 

as follows: 

Water and use classification Applicable criteria 

(i) All inland waters of the United 

States or enclosed bays and estuaries that are waters of the 

United States that include a 

MUN use designation.

(A) Columns B1 and B2—all pollutants 

(B) Columns C1 and C2—all pollutants 

(C) Column D1—all pollutants 

(ii) All inland waters of the United 

States or enclosed bays and estuaries that are waters of the 

United States that do not include 

a MUN use designation.

(A) Columns B1 and B2—all pollutants 

(B) Columns C1 and C2—all pollutants 

(C) Column D2—all pollutants 

(3) Nothing in this section is intended 

to apply instead of specific criteria, including specific criteria for the San 

Francisco Bay estuary, promulgated 

for California in the National Toxics 

Rule at § 131.36. 

(4) The human health criteria shall 

be applied at the State-adopted 10 (¥6) 

risk level. 

(5) Nothing in this section applies to 

waters located in Indian Country. 

(e) Schedules of compliance. (1) It is 

presumed that new and existing point 

source dischargers will promptly comply with any new or more restrictive 

water quality-based effluent limitations (‘‘WQBELs’’) based on the water 

quality criteria set forth in this section. 

(2) When a permit issued on or after 

May 18, 2000 to a new discharger contains a WQBEL based on water quality 

criteria set forth in paragraph (b) of 

this section, the permittee shall comply with such WQBEL upon the commencement of the discharge. A new discharger is defined as any building, 

structure, facility, or installation from 


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Environmental Protection Agency § 131.38 

which there is or may be a ‘‘discharge 

of pollutants’’ (as defined in 40 CFR 

122.2) to the State of California’s inland 

surface waters or enclosed bays and estuaries, the construction of which commences after May 18, 2000. 

(3) Where an existing discharger reasonably believes that it will be infeasible to promptly comply with a new or 

more restrictive WQBEL based on the 

water quality criteria set forth in this 

section, the discharger may request approval from the permit issuing authority for a schedule of compliance. 

(4) A compliance schedule shall require compliance with WQBELs based 

on water quality criteria set forth in 

paragraph (b) of this section as soon as 

possible, taking into account the dischargers’ technical ability to achieve 

compliance with such WQBEL. 

(5) If the schedule of compliance exceeds one year from the date of permit 

issuance, reissuance or modification, 

the schedule shall set forth interim requirements and dates for their achievement. The dates of completion between 

each requirement may not exceed one 

year. If the time necessary for completion of any requirement is more than 

one year and is not readily divisible 

into stages for completion, the permit 

shall require, at a minimum, specified 

dates for annual submission of progress 

reports on the status of interim requirements. 

(6) In no event shall the permit 

issuing authority approve a schedule of 

compliance for a point source discharge which exceeds five years from 

the date of permit issuance, reissuance, 

or modification, whichever is sooner. 

Where shorter schedules of compliance 

are prescribed or schedules of compliance are prohibited by law, those provisions shall govern. 

(7) If a schedule of compliance exceeds the term of a permit, interim 

permit limits effective during the permit shall be included in the permit and 

addressed in the permit’s fact sheet or 

statement of basis. The administrative 

record for the permit shall reflect final 

permit limits and final compliance 

dates. Final compliance dates for final 

permit limits, which do not occur during the term of the permit, must occur 

within five years from the date of 

issuance, reissuance or modification of 

the permit which initiates the compliance schedule. Where shorter schedules 

of compliance are prescribed or schedules of compliance are prohibited by 

law, those provisions shall govern. 

(8) The provisions in this paragraph 

(e), Schedules of compliance, shall expire on May 18, 2005. 

[65 FR 31711, May 18, 2000, as amended at 66 

FR 9961, Feb. 13, 2001; 68 FR 62747, Nov. 6, 

2003] 

EDITORIAL NOTE: At 66 FR 9961, Feb. 13, 

2001, § 131.38 was amended in the table to 

paragraph (b)(1) under the column heading 

for ‘‘B Freshwater’’ by revising the column 

headings for ‘‘Criterion Maximum Concentration’’ and ‘‘Criterion Continuous Concentration’’; under the column heading for 

‘‘C Saltwater’’ by revising the column headings for ‘‘Criterion Maximum Concentration’’ and ‘‘Criterion Continuous Concentration’’; and by revising entries ‘‘23.’’ and 

‘‘67.’’, effective Feb. 13, 2001. However, this is 

a photographed table and the amendments 

could not be incorporated into the text. For 

the convenience of the user, the amended 

text is set forth as follows: 

§ 131.38 Establishment of Numeric Criteria 

for priority toxic pollutants for the State 

of California. 

* * * * * 

(b)(1) * * * 


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§ 131.38 40 CFR Ch. I (7–1–08 Edition) A B Freshwater C Saltwater D Human health (10¥6) risk for carcinogens) For consumption of: # Compound CAS number Criterion maximum conc. (μg/ L) d B1 Criterion continous conc. (μg/ L) d B2 Criterion maximum conc. (μg/ L) d C1 Criterion continious conc. (μg/ L) d C2 Water & organisms 

(μg/L) 

D1 

Organisms 

only 

(μg/L) 

D2 

* * * * * * * 

23. Chlorodibromomethane ................................................. 124481 .................... .................... .................... .................... a,c 0.41 a,c 34 

* * * * * * * 

67. Bis(2-Chloroisopropyl)Ether ........................................... 108601 .................... .................... .................... .................... a 1,400 a,t 170,000 

* * * * * * * 

Footnotes to table in Paragraph (b)(1): * * * * * * * a Criteria revised to reflect the Agency q1* or RfD, as contained in the Integrated Risk Information System (IRIS) as of October 1, 1996. The fish tissue bioconcentration factor (BCF) from the 1980 documents was retained in each case. c Criteria are based on carcinogenicity of 10¥6 risk. d Criteria Maximum Concentration (CMC) equals the highest concentration of a pollutant to which aquatic life can be exposed for a short period of time without 

deleterious effects. Criteria Continuous Concentration (CCC) equals the highest concentration of a pollutant to which aquatic life can be exposed for an extended period of time (4 days) without deleterious effects. μg/L equals micrograms per liter. 

* * * * * * * 

tThese criteria were promulgated for specific waters in California in the NTR. The specific waters to which the NTR criteria apply include: Waters of the State 

defined as bays and estuaries including San Francisco Bay upstream to and including Suisun Bay and the Sacramento-San Joaquin Delta; and waters of the State defined as inland (i.e., all surface waters of the State not bays or estuaries or ocean) without a MUN use designation. This section does not apply instead of the NTR for these criteria. 


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Environmental Protection Agency § 131.40 

* * * * * 

§ 131.40 Puerto Rico 

(a) Use designations for marine waters. 

In addition to the Commonwealth’s 

adopted use designations, the following 

waterbodies in Puerto Rico have the 

beneficial use designated in this paragraph (a) within the bays specified 

below, and within the Commonwealth’s 

territorial seas, as defined in section 

502(8) of the Clean Water Act, and 33 

CFR 2.05–5, except such waters classified by the Commonwealth as SB. 

Waterbody segment From To Designated use 

Coastal Waters ........................ 500m offshore ........................ 3 miles offshore ..................... Primary Contact Recreation. 

Guayanilla & Tallaboa Bays .... Cayo Parguera ....................... Punta Verraco ........................ Primary Contact Recreation. 

Mayaguez Bay ......................... Punta Guanajibo .................... Punta Algarrobo ..................... Primary Contact Recreation. 

Ponce Port ............................... Punta Carenero ...................... Punta Cuchara ....................... Primary Contact Recreation. 

San Juan Port .......................... mouth of Rı ́o Bayamo ́n .......... Punta El Morro ....................... Primary Contact Recreation. 

Yabucoa Port ........................... Punta Icacos .......................... Punta Yeguas ........................ Primary Contact Recreation. 

(b) Criteria that apply to Puerto Rico’s 

marine waters. In addition to all other 

Commonwealth criteria, the following 

criteria for bacteria apply to the 

waterbodies in paragraph (a) of this 

section: 

Bacteria: The fecal coliform geometric mean of a series of representative samples (at least five samples) of 

the waters taken sequentially shall not 

exceed 200 colonies/100 ml, and not 

more than 20 percent of the samples 

shall exceed 400 colonies/100 ml. The 

enterococci density in terms of geometric mean of at least five representative samples taken sequentially shall 

not exceed 35/100 ml. No single sample 

should exceed the upper confidence 

limit of 75% using 0.7 as the log standard deviation until sufficient site data 

exist to establish a site-specific log 

standard deviation. 

(c) Water quality standard variances. 

(1) The Regional Administrator, EPA 

Region 2, is authorized to grant 

variances from the water quality 

standards in paragraphs (a) and (b) of 

this section where the requirements of 

this paragraph (c) are met. A water 

quality standard variance applies only 

to the permittee requesting the variance and only to the pollutant or pollutants specified in the variance; the 

underlying water quality standard otherwise remains in effect. 

(2) A water quality standard variance 

shall not be granted if: 

(i) Standards will be attained by implementing effluent limitations required under sections 301(b) and 306 of 

the CWA and by the permittee implementing reasonable best management 

practices for nonpoint source control; 

or 

(ii) The variance would likely jeopardize the continued existence of any 

threatened or endangered species listed 

under section 4 of the Endangered Species Act or result in the destruction or 

adverse modification of such species’

critical habitat. 

(3) A water quality standards variance may be granted if the applicant 

demonstrates to EPA that attaining 

the water quality standard is not feasible because: 

(i) Naturally occurring pollutant concentrations prevent the attainment of 

the use; 

(ii) Natural, ephemeral, intermittent 

or low flow conditions or water levels 

prevent the attainment of the use, unless these conditions may be compensated for by the discharge of sufficient volume of effluent discharges 

without violating Commonwealth 

water conservation requirements to enable uses to be met; 

(iii) Human caused conditions or 

sources of pollution prevent the attainment of the use and cannot be remedied or would cause more environmental damage to correct than to leave 

in place; 

(iv) Dams, diversions or other types 

of hydrologic modifications preclude 

the attainment of the use, and it is not 

feasible to restore the waterbody to its 

original condition or to operate such 

modification in a way which would result in the attainment of the use; 

(v) Physical conditions related to the 

natural features of the waterbody, such 

as the lack of a proper substrate, cover, 

flow, depth, pools, riffles, and the like 


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§ 131.41 40 CFR Ch. I (7–1–08 Edition) 

unrelated to water quality, preclude 

attainment of aquatic life protection 

uses; or 

(vi) Controls more stringent than 

those required by sections 301(b) and 

306 of the CWA would result in substantial and widespread economic and social impact. 

(4) Procedures. An applicant for a 

water quality standards variance shall 

submit a request to the Regional Administrator of EPA Region 2. The application shall include all relevant information showing that the requirements for a variance have been met. 

The applicant must demonstrate that 

the designated use is unattainable for 

one of the reasons specified in paragraph (c)(3) of this section. If the Regional Administrator preliminarily determines that grounds exist for granting a variance, he/she shall provide 

public notice of the proposed variance 

and provide an opportunity for public 

comment. Any activities required as a 

condition of the Regional Administrator’s granting of a variance shall be included as conditions of the NPDES permit for the applicant. These terms and 

conditions shall be incorporated into 

the applicant’s NPDES permit through 

the permit reissuance process or 

through a modification of the permit 

pursuant to the applicable permit 

modification provisions of Puerto 

Rico’s NPDES program. 

(5) A variance may not exceed five 

years or the term of the NPDES permit, whichever is less. A variance may 

be renewed if the applicant reapplies 

and demonstrates that the use in question is still not attainable. Renewal of 

the variance may be denied if the applicant did not comply with the conditions of the original variance, or otherwise does not meet the requirements of 

this section. 

[69 FR 3524, Jan. 26, 2004] 

§ 131.41 Bacteriological criteria for 

those states not complying with 

Clean Water Act section 303(i)(1)(A). 

(a) Scope. This section is a promulgation of the Clean Water Act section 

304(a) criteria for bacteria for coastal 

recreation waters in specific States. It 

is not a general promulgation of the 

Clean Water Act section 304(a) criteria 

for bacteria. This section also contains 

a compliance schedule provision. 

(b) Definitions. (1) Coastal Recreation 

Waters are the Great Lakes and marine 

coastal waters (including coastal estuaries) that are designated under section 303(c) of the Clean Water Act for 

use for swimming, bathing, surfing, or 

similar water contact activities. Coastal recreation waters do not include inland waters or waters upstream from 

the mouth of a river or stream having 

an unimpaired natural connection with 

the open sea. 

(2) Designated bathing beach waters are 

those coastal recreation waters that, 

during the recreation season, are heavily-used (based upon an evaluation of 

use within the State) and may have: a 

lifeguard, bathhouse facilities, or public parking for beach access. States 

may include any other waters in this 

category even if the waters do not 

meet these criteria. 

(3) Moderate use coastal recreation waters are those coastal recreation waters 

that are not designated bathing beach 

waters but typically, during the recreation season, are used by at least half 

of the number of people as at typical 

designated bathing beach waters within the State. States may also include 

light use or infrequent use coastal 

recreation waters in this category. 

(4) Light use coastal recreation waters 

are those coastal recreation waters 

that are not designated bathing beach 

waters but typically, during the recreation season, are used by less than half 

of the number of people as at typical 

designated bathing beach waters within the State, but are more than infrequently used. States may also include 

infrequent use coastal recreation waters in this category. 

(5) Infrequent use coastal recreation 

waters are those coastal recreation waters that are rarely or occasionally 

used. 

(6) New pathogen discharger for the 

purposes of this section means any 

building, structure, facility, or installation from which there is or may be a 

discharge of pathogens, the construction of which commenced on or after 

December 16, 2004. It does not include 

relocation of existing combined sewer 

overflow outfalls. 


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Environmental Protection Agency § 131.41 

(7) Existing pathogen discharger for the 

purposes of this section means any discharger that is not a new pathogen discharger. 

(c) EPA’s section 304(a) ambient water 

quality criteria for bacteria. (1) 

Freshwaters: 

A 

Indicator d

B 

Geometric mean 

C 

Single sample maximum 

(per 100 ml) 

C1 

Designated bathing beach 

(75% confidence 

level) 

C2 

Moderate use 

costal recreation 

waters 

(82% confidence 

level) 

C3 

Light use coastal 

recreation waters 

(90% confidence 

level) 

C4 

Infrequent use 

coastal recreation 

waters 

(95% confidence 

level) 

E. coli e ..................... 126/100 mil a ........... b 235 b 298 b 409 b 575 

Enterococci e ............ 33/100 ml c .............. b 61 b 78 b 107 b 151 

Footnotes to table in paragraph (c)(1): 

a. This value is for use with analytical methods 1103.1, 1603, or 1604 or any equivalent method that measures viable bacteria. 

b. Calculated using the following: single sample maximum = geometric mean * 10∧(confidence level factor * log standard deviation), where the confidence level factor is: 75%: 0.68; 82%: 0.94; 90%: 1.28; 95%: 1.65. The log standard deviation from EPA’s 

epidemiological studies is 0.4. 

c. This value is for use with analytical methods 1106.1 or 1600 or any equivalent method that measures viable bacteria. 

d. The State may determine which of these indicators applies to its freshwater coastal recreation waters. Until a State makes 

that determination, E. coli will be the applicable indicator. 

e. These values apply to E. coli or enterococci regardless of origin unless a sanitary survey shows that sources of the indicator 

bacteria are non-human and an epidemiological study shows that the indicator densities are not indicative of a human health 

risk. 

(2) Marine waters: 

A 

Indicator 

B 

Geometric mean 

C 

Single sample maximum 

(per 100 ml) 

C1 

Designated bathing beach 

(75% confidence 

level) 

C2 

Moderate use 

coastal recreation 

waters 

(82% confidence 

level) 

C3 

Light use coastal 

recreation waters 

(90% confidence 

level) 

C4 

Infrequent use 

coastal recreation 

waters 

(95% confidence 

level) 

Enterococci c ............ 35/100 ml a .............. b 104 b 158 b 276 b 501 

Footnotes to table in paragraph (c)(2): 

a. This value is for use with analytical methods 1106.1 or 1600 or any equivalent method that measures viable bacteria. 

b. Calculated using the following: single sample maximum = geometric mean * 10∧(confidence level factor * log standard deviation), where the confidence level factor is: 75%: 0.68; 82%: 0.94; 90%: 1.28; 95%: 1.65. The log standard deviation from EPA’s epidemiological studies is 0.7. 

c. These values apply to enterococci regardless of origin unless a sanitary survey shows that sources of the indicator bacteria

are non-human and an epidemiological study shows that the indicator densities are not indicative of a human health risk. 

(3) As an alternative to the single 

sample maximum in paragraph (c)(1) or 

(c)(2) of this section, States may use a 

site-specific log standard deviation to 

calculate a single sample maximum for 

individual coastal recreation waters, 

but must use at least 30 samples from 

a single recreation season to do so. 

(d) Applicability. (1) The criteria in 

paragraph (c) of this section apply to 

the coastal recreation waters of the 

States identified in paragraph (e) of 

this section and apply concurrently 

with any ambient recreational water 

criteria adopted by the State, except 

for those coastal recreation waters 

where State regulations determined by 

EPA to meet the requirements of Clean 

Water Act section 303(i) apply, in which 

case the State’s criteria for those 

coastal recreation waters will apply 

and not the criteria in paragraph (c) of 

this section. 

(2) The criteria established in this 

section are subject to the State’s general rules of applicability in the same 

way and to the same extent as are 

other Federally-adopted and Stateadopted numeric criteria when applied 

to the same use classifications. 

(e) Applicability to specific jurisdictions. (1) The criteria in paragraph 

(c)(1) of this section apply to fresh 

coastal recreation waters of the following States: Illinois, Minnesota, New 

York, Ohio, Pennsylvania, Wisconsin. 


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§ 131.42 40 CFR Ch. I (7–1–08 Edition) 

(2) The criteria in paragraph (c)(2) of 

this section apply to marine coastal 

recreation waters of the following 

States: Alaska, California (except for 

coastal recreation waters within the 

jurisdiction of Regional Board 4), Florida, Georgia, Hawaii (except for coastal 

recreation waters within 300 meters of 

the shoreline), Louisiana, Maine (except for SA waters and SB and SC waters with human sources of fecal contamination), Maryland, Massachusetts, 

Mississippi, New York, North Carolina, 

Oregon, Puerto Rico (except for waters 

classified by Puerto Rico as intensely 

used for primary contact recreation 

and for those waters included in 

§ 131.40), Rhode Island, United States 

Virgin Islands. 

(f) Schedules of compliance. (1) This 

paragraph (f) applies to any State that 

does not have a regulation in effect for 

Clean Water Act purposes that authorizes compliance schedules for National 

Pollutant Discharge Elimination System permit limitations needed to meet 

the criteria in paragraph (c) of this section. All dischargers shall promptly 

comply with any new or more restrictive water quality-based effluent limitations based on the water quality criteria set forth in this section. 

(2) When a permit issued on or after 

December 16, 2004, to a new pathogen 

discharger as defined in paragraph (b) 

of this section contains water qualitybased effluent limitations based on 

water quality criteria set forth in paragraph (c) of this section, the permittee 

shall comply with such water qualitybased effluent limitations upon the 

commencement of the discharge. 

(3) Where an existing pathogen discharger reasonably believes that it will 

be infeasible to comply immediately 

with a new or more restrictive water 

quality-based effluent limitations 

based on the water quality criteria set 

forth in paragraph (c) of this section, 

the discharger may request approval 

from the permit issuing authority for a 

schedule of compliance. 

(4) A compliance schedule for an existing pathogen discharger shall require compliance with water qualitybased effluent limitations based on 

water quality criteria set forth in paragraph (c) of this section as soon as possible, taking into account the discharger’s ability to achieve compliance 

with such water quality-based effluent 

limitations. 

(5) If the schedule of compliance for 

an existing pathogen discharger exceeds one year from the date of permit 

issuance, reissuance or modification, 

the schedule shall set forth interim requirements and dates for their achievement. The period between dates of 

completion for each requirement may 

not exceed one year. 

If the time necessary for completion 

of any requirement is more than one 

year and the requirement is not readily 

divisible into stages for completion, 

the permit shall require, at a minimum, specified dates for annual submission of progress reports on the status of interim requirements. 

(6) In no event shall the permit 

issuing authority approve a schedule of 

compliance for an existing pathogen 

discharge which exceeds five years 

from the date of permit issuance, 

reissuance, or modification, whichever 

is sooner. 

(7) If a schedule of compliance exceeds the term of a permit, interim 

permit limits effective during the permit shall be included in the permit and 

addressed in the permit’s fact sheet or 

statement of basis. The administrative 

record for the permit shall reflect final 

permit limits and final compliance 

dates. Final compliance dates for final 

permit limits, which do not occur during the term of the permit, must occur 

within five years from the date of 

issuance, reissuance or modification of 

the permit which initiates the compliance schedule. 

[69 FR 67242, Nov. 16, 2004] 

§ 131.42 Antidegradation Implementation Methods for the Commonwealth of Puerto Rico. 

(a) General Policy Statement. (1) All 

point sources of pollution are subject 

to an antidegradation review. 

(2) An antidegradation review shall 

be initiated as part of the Section 401—

‘‘Water Quality Certification Process’’

of the Clean Water Act. 

(3) The 401 Certification Process shall 

follow the procedures established by 

the February 2, 1989 Resolution R–89–2–

2 of the Governing Board of the Puerto 


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Environmental Protection Agency § 131.42 

Rico Environmental Quality Board 

(EQB). 

(4) The following are not subject to 

an antidegradation review due to the 

fact that they are nondischarge systems and are managed by specific applicable Puerto Rico regulations: 

(i) All nonpoint sources of pollutants. 

(ii) Underground Storage Tanks. 

(iii) Underground Injection Facilities. 

(5) The protection of water quality 

shall include the maintenance, migration, protection, and propagation of desirable species, including threatened 

and endangered species identified in 

the local and federal regulations. 

(b) Definitions. (1) All the definitions 

included in Article 1 of the Puerto Rico 

Water Quality Standards Regulation 

(PRWQSR), as amended, are applicable 

to this procedure. 

(2) High Quality Waters: 

(i) Are waters whose quality is better 

than the mandatory minimum level to 

support the CWA Section 101(a)(2) goals 

of propagation of fish, shellfish, wildlife and recreation in and on the waters. High Quality Waters are to be 

identified by EQB on a parameter-byparameter basis. 

(ii) [Reserved] 

(3) Outstanding National Resources 

Waters (ONRWs): 

(i) Are waters classified as SA or SE 

in the PRWQSR, as amended, or any 

other water designated by Resolution 

of the Governing Board of EQB. ONRWs 

are waters that are recreationally or 

ecologically important, unique or sensitive. 

(ii) [Reserved] 

(c) Antidegradation Review Procedure. 

(1) The antidegradation review will 

commence with the submission of the 

CWA Section 401 water quality certification request. EQB uses a parameterby-parameter approach for the implementation of the anti-degradation policy and will review each parameter separately as it evaluates the request for 

certification. The 401 certification/ 

antidegradation review shall comply 

with Article 4(B)(3) of the Puerto Rico 

Environmental Public Policy Act (Law 

No. 416 of September 22, 2004, as amended (12 LPRA 8001 et seq.)). Compliance 

with Article 4(B)(3) shall be conducted 

in accordance with the Reglamento de 

la Junta de Calidad Ambiental para el 

Proceso de Presentacio ́n, Evaluacio ́n y 

Tra ́mite de Documentos Ambientales 

(EQB’s Environmental Documents Regulation). As part of the evaluation of 

the Environmental Document an alternatives analysis shall be conducted (12 

LPRA 8001(a)(5), EQB’s Environmental 

Documents Regulation, e.g., Rules 211E 

and 253C), and a public participation 

period and a public hearing shall be 

provided (12 LPRA 8001(a), EQB’s Environmental Documents Regulation, 

Rule 254). 

(2) In conducting an antidegradation 

review, EQB will sequentially apply the 

following steps: 

(i) Determine which level of 

antidegradation applies 

(A) Tier 1—Protection of Existing 

and Designated Uses. 

(B) Tier 2—Protection of High Quality Waters. 

(C) Tier 3—Protection of ONRWs. 

(ii) [Reserved] 

(3) Review existing water quality 

data and other information submitted 

by the applicant. The applicant shall 

provide EQB with the information regarding the discharge, as required by 

the PRWQSR including, but not limited to the following: 

(i) A description of the nature of the 

pollutants to be discharged. 

(ii) Treatment technologies applied 

to the pollutants to be discharged. 

(iii) Nature of the applicant’s business. 

(iv) Daily maximum and average flow 

to be discharged. 

(v) Effluent characterization. 

(vi) Effluent limitations requested to 

be applied to the discharge according 

to Section 6.11 of the PRWQSR. 

(vii) Location of the point of discharge. 

(viii) Receiving waterbody name. 

(ix) Water quality data of the receiving waterbody. 

(x) Receiving waterbody minimum 

flow (7Q2 and 7Q10) for stream waters. 

(xi) Location of water intakes within 

the waterbody. 

(xii) In the event that the proposed 

discharge will result in the lowering of 

water quality, data and information 

demonstrating that the discharge is 

necessary to accommodate important 

economic or social development in the 


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§ 131.42 40 CFR Ch. I (7–1–08 Edition) 

area where the receiving waters are located. 

(4) Determine if additional information or assessment is necessary to 

make the decision. 

(5) Prepare an intent to issue or deny 

the 401 water quality certificate and 

publish a notice in a newspaper of wide 

circulation in Puerto Rico informing 

the public of EQB’s preliminary decision and granting a public participation period of at least thirty (30) days. 

(6) Address the comments received 

from the interested parties and consider such comments as part of the decision making process. 

(7) Make the final determination to 

issue or deny the requested 401 certification. Such decision is subject to the 

reconsideration procedure established 

in Law 170 of August 12, 1988, Ley de 

Procedimiento Administrativo Uniforme 

del Estado Libre Asociado de Puerto Rico 

(3 LPRA 2165). 

(d) Implementation Procedures. (1) Activities Regulated by NPDES Permits 

(i) Tier 1—Protection of Existing and 

Designated Uses: 

(A) Tier 1 waters are: 

(1) Those waters of Puerto Rico (except Tier 2 or Tier 3 waters) identified 

as impaired and that have been included on the list required by Section 

303(d) of the CWA; and 

(2) Those waters of Puerto Rico (except Tier 2 and Tier 3 waters) for which 

attainment of applicable water quality 

standards has been or is expected to be, 

achieved through implementation of 

effluent limitations more stringent 

than technology-based controls (Best 

Practicable Technology, Best Available 

Technology and Secondary Treatment). 

(B) To implement Tier 1 

antidegradation, EQB shall determine 

if a discharge would lower the water 

quality to the extent that it would no 

longer be sufficient to protect and 

maintain the existing and designated 

uses of that waterbody. 

(C) When a waterbody has been affected by a parameter of concern causing it to be included on the 303(d) List, 

then EQB will not allow an increase of 

the concentration of the parameter of 

concern or pollutants affecting the parameter of concern in the waterbody. 

This no increase will be achieved by 

meeting the applicable water quality 

standards at the end of the pipe. Until 

such time that a Total Maximum Daily 

Load (TMDL) is developed for the parameter of concern for the waterbody, 

no discharge will be allowed to cause or 

contribute to further degradation of 

the waterbody. 

(D) When the assimilative capacity of 

a waterbody is not sufficient to ensure 

maintenance of the water quality 

standard for a parameter of concern 

with an additional load to the 

waterbody, EQB will not allow an increase of the concentration of the parameter of concern or pollutants affecting the parameter of concern in the 

waterbody. This no increase will be 

achieved by meeting the applicable 

water quality standards at the end of 

the pipe. Until such time that a TMDL 

is developed for the parameter of concern for the waterbody, no discharge 

will be allowed to cause or contribute 

to further degradation of the 

waterbody. 

(ii) Tier 2—Protection of High Quality Waters: 

(A) To verify that a waterbody is a 

high quality water for a parameter of 

concern which initiates a Tier 2 

antidegradation review, EQB shall 

evaluate and determine: 

(1) The existing water quality of the 

waterbody; 

(2) The projected water quality of the 

waterbody pursuant to the procedures 

established in the applicable provisions 

of Articles 5 and 10 of the PRWQSR including but not limited to, Sections 5.2, 

5.3, 5.4, 10.2, 10.3, 10.4, 10.5, and 10.6; 

(3) That the existing and designated 

uses of the waterbody will be fully 

maintained and protected in the event 

of a lowering of water quality. 

In multiple discharge situations, the 

effects of all discharges shall be evaluated through a waste load allocation 

analysis in accordance with the applicable provisions of Article 10 of the 

PRWQSR or the applicable provisions 

of Article 5 regarding mixing zones. 

(B) In order to allow the lowering of 

water quality in high quality waters, 

the applicant must show and justify 

the necessity for such lowering of 

water quality through compliance with 

the requirements of Section 6.11 of the 

PRWQSR. EQB will not allow the entire assimilative capacity of a 


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Environmental Protection Agency § 132.1 

waterbody for a parameter of concern 

to be allocated to a discharger, if the 

necessity of the requested effluent limitation for the parameter of concern is 

not demonstrated to the full satisfaction of EQB. 

(iii) Tier 3—Protection of ONRWs: 

(A) EQB may designate a water as 

Class SA or SE (ONRWs) through a 

Resolution (PRWQSR Sections 2.1.1 

and 2.2.1). Additionally, any interested 

party may nominate a specific water to 

be classified as an ONRW and the Governing Board of EQB will make the 

final determination. Classifying a 

water as an ONRW may result in the 

water being named in either Section 

2.1.1 or 2.2.2 of the PRWQSR, which 

would require an amendment of the 

PRWQSR. The process for amending 

the PRWQSR, including public participation, is set forth in Section 8.6 of 

said regulation. 

(B) The existing characteristics of 

Class SA and SE waters shall not be altered, except by natural causes, in 

order to preserve the existing natural 

phenomena. 

(1) No point source discharge will be 

allowed in ONRWs. 

(2) [Reserved] 

(2) Activities Regulated by CWA Section 404 or Rivers and Harbors Action 

Section 10 Permits (Discharge of 

Dredged or Fill Material) 

(i) EQB will only allow the discharge 

of dredged or fill material into a wetland if it can be demonstrated that 

such discharge will not have an unacceptable adverse impact either individually or in combination with other activities affecting the wetland of concern. The impacts to the water quality 

or the aquatic or other life in the wetland due to the discharge of dredged or 

fill material should be avoided, minimized and mitigated. 

(ii) The discharge of dredged or fill 

material shall not be certified if there 

is a practicable alternative to the proposed discharge which would have less 

adverse impact on the recipient ecosystem, so long as the alternative does 

not have other more significant adverse environmental consequences. Activities which are not water dependent 

are presumed to have practicable alternatives, unless the applicant clearly 

demonstrates otherwise. No discharge 

of dredged and fill material shall be 

certified unless appropriate and practicable steps have been taken which 

minimize potential adverse impacts of 

the discharge on the recipient ecosystem. The discharge of dredged or fill 

material to ONRWs, however, shall be 

governed by paragraph (d)(1)(iii) of this 

section. 

[72 FR 70524, Dec. 12, 2007] 

PART 132—WATER QUALITY GUIDANCE FOR THE GREAT LAKES 

SYSTEM 

Sec. 

132.1 Scope, purpose, and availability of 

documents. 

132.2 Definitions. 

132.3 Adoption of criteria. 

132.4 State adoption and application of 

methodologies, policies and procedures. 

132.5 Procedures for adoption and EPA review. 

132.6 Application of part 132 requirements 

in Great Lakes States and Tribes. 

TABLES TO PART 132 

APPENDIX A TO PART 132—GREAT LAKES

WATER QUALITY INITIATIVE METHODOLOGIES FOR DEVELOPMENT OF AQUATIC LIFE

CRITERIA AND VALUES

APPENDIX B TO PART 132—GREAT LAKES

WATER QUALITY INITIATIVE

APPENDIX C TO PART 132—GREAT LAKES

WATER QUALITY INITIATIVE METHODOLOGIES FOR DEVELOPMENT OF HUMAN

HEALTH CRITERIA AND VALUES

APPENDIX D TO PART 132—GREAT LAKES

WATER QUALITY INITIATIVE METHODOLOGY

FOR THE DEVELOPMENT OF WILDLIFE CRITERIA

APPENDIX E TO PART 132—GREAT LAKES

WATER QUALITY INITIATIVE

ANTIDEGRADATION POLICY

APPENDIX F TO PART 132—GREAT LAKES

WATER QUALITY INITIATIVE IMPLEMENTATION PROCEDURES

AUTHORITY: 33 U.S.C. 1251 et seq. 

SOURCE: 60 FR 15387, Mar. 23, 1995, unless 

otherwise noted. 

§ 132.1 Scope, purpose, and availability 

of documents. 

(a) This part constitutes the Water 

Quality Guidance for the Great Lakes 

System (Guidance) required by section 

118(c)(2) of the Clean Water Act (33 

U.S.C. 1251 et seq.) as amended by the 

Great Lakes Critical Programs Act of 

1990 (Pub. L. 101–596, 104 Stat. 3000 et 


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