Sediment and Nutrient Criteria in EPA

- Permitted States

Table 1 Established Sediment and Nutrient Criteria in EPA

- Permitted States, Territories, and Tribes Region State/Tribe Sediment Water Quality Standard Nutrients Water Quality S tandard 1 New Hampshire

http://des.nh.gov/ organization/com missioner/legal /ru les/documents/en

v

- wq1700.pdf TURBIDITY

A discharge may not cause or contribute to a turbidity increase of 10 NTU or more above the turbidity of the receiving water upstream of the discharge or otherwise outside of the visible discharge. Class A waters

– No discharge allowed 1



### . Class B waters

– No turbidity increase over 1 0 NTUs above background conditions

. NITROGEN Class A waters

– No discharge allowed 1

. Class B waters

– Narrative standard. PHOSPHORUS Class A waters

– No discharge allowed 1

. Class B waters

– Narrative standard. Lakes and Ponds

– No discharge allowed 1

.

Massachusetts Surface Water Quality Standards

, the and http://www.mass. gov/dep/service/r egulations/314cm r04.pdf NARRATIVE STANDARD O NLY NARRATIVE STANDARD O NLY

Mashpee Wampanoag Indian Tribal Council, Inc. T URBIDITY

Narrati ve Standard Only NARRATIVE STANDARD O NLY

Wampanoag Tribe of Gay Head TURBIDITY

Narrative Standard Only NARRATIVE STANDARD O NLY

2 Puerto Rico

http://www.epa.g ov/waterscience/s tandards/wqslibra ry/pr/pr_2_wqs.p df TURBIDITY

Class SB Waters (coastal and estuarine waters) and SC Waters (coastal waters)

– Turbidity must not exceed 10 NTU , except by natural causes. Class SD Waters (surface waters for public water supply)

– Turbidity must not exceed 50 NTU , except by natural causes

. Class SG1 Waters (ground waters for drinking water/ag use)

– Narrative standard. PHOSPHORUS Class SD Waters

– Total phosphorus must not exceed 1 ppm in surface water bodies upstream from reservoirs, in segments of surface water bodies with drinking water intakes

, or estuarine wat ers except when it is demonstrated to the satisfaction of the Board that a higher value of total phosphorus in combination with prevailing nitrogen derived nutrients will not contribute to eutrophic conditions in the water body.

1 Sampling must not detect any of the pollutant in the discharge.St. Regis Mohawk Tribe http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/srmt_2_ %20wqs.pdf TOTAL DISSOLVED SOLIDS

Must not increase by more than 1/3 of naturally

- occurring levels, and must not exceed 500 mg/L. NARRATIVE STANDARD ONLY

3 District of

Columbia T URBIDITY

C lasses A, B, & C Waters

– No turbidity increase over 2 0 NTUs above background conditions

. NONE

4 Seminole Tribe

of Florida http://www.epa.g ov/waterscience/ s tandards/wqslibra ry/tribes/semi_tri be_fl_4_wqs.pdf TURBIDITY

Class I, II

- B, II

- C , and III Waters

– No turbidity increase over 29 NTUs above background conditions. Class II

- A Waters

- Narrative standard only. NARRATIVE STANDARD O NLY

Miccosukee Tribe http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/fl_4_mic cosukee.pdf TURBIDITY

Class I and III

- A Waters

– No turbidity increase over 29 NTUs above background conditions. Class III

- B Waters

– No turbidity increase over 29 NTUs above background conditions. NARRATIVE STANDARD O NLY

5 Fon du Lac

Band of Lake Superior Chippewa http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/chippew a.pdf TURB IDITY

Settleable and suspended solids must not reduce the depth of the compensation point for photosynthetic activity by more than 10% from the seasonally established norm for aquatic life. NARRATIVE STANDARD O NLY

6 New Mexico

http://www.nmcp
r.state.nm.u s/nma c/parts/title20/20. 006.0004.pdf TURBIDITY

Turbidity shall not exceed 10 NTU over background turbidity when the background turbidity is 50 NTU or less, or increase more than 20 percent when the backgroun d turbidity is more than 50 NTU

. NARRATIVE STAND ARD ONLYOhkay Owingeh (Pueblo of San Juan) http://www.epa. gov/waterscienc e/standa rds/wqsl ibrary/tribes/ohk ay.pdf TURBIDITY

Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU or less, or increase more tha n 10 percent when the backgroun d turbidity is more than 50 NTU

. Primary Contact Ceremonial Use

- Turbidity must not exceed 25 NTU's

.

F or uses and stand ards for designated waterbodies, s ee: http://www.epa.gov/waterscience/standards/wqslibrary/tribes/o hkay.pdf

. NITROGEN Primary Contact Ceremonial Use

– Nitrate must not exceed 10.0 mg/l

.

F or uses and stand ards for designated waterbodies, s ee: http://www.epa.gov/waterscience/standards/wqslibrary/tribes/ohkay.pd f

.

Pueblo of Acoma Water Quality Standards http://www.epa. gov/waterscienc e/standa rds/wqsl ibrary/tribes/aco ma.pdf TOTAL DISSOLV ED

SOLIDS Warm Water Habitat, Cold Water Habitat, Ephemeral, Domestic Water Source and Groundwater Recharge, and Primary Contact Recreational

– Total dissolved solids must not exceed 1000 mg/L TURBIDITY Turbidity shall not exceed 5 NTU over background turb idity when the background turbidity is 50 NTU or less, or increase more than 10 percent when the backgroun d turbidity is more than 50 NTU

.

Domestic Water Source and Groundwater Recharge, a nd Primary Contact Recreational

– Turbidity Must Not Exceed 25 NTU Warmwater Habitat, Coldwater Habitat, Ephemeral, Fish Consumption, Agricultural Irrigation, Agricultural Livestock Wat ering, and Partial Body Contact

– ≤5 NTU variation for waters with ≤ 50 NTU background and a 10% increase from background for waters >50 N TU. NITROGEN Domestic Water Source and Groundwater Recharge, Primary Contact Recreational, and Partial Body Contact: Nitrogen

– Nitrate must not exceed 10.0 mg/L PHOSPHORUS Streams

- Total phosphorus must not exceed 100 ug/L Lakes and Reservoirs

– Total ph osphorus must not exceed 50 ug/L

Pueblo of Isleta http://www.epa. gov/waterscienc TURBIDITY

Turbidity shall not exc eed 5 NTU over background turbidity when the background turbidity is 50 NTU or less, or increase NITROGEN Primary Contact Ceremonial

– Total inorganic nitrogen must not exceed 10 mg/L

.e/standards/wqsl ibrary/tribes/isle ta_6_wqs.pdf more than 10 percent when the backgroun d turbidity is more

than 50 NTU

.

Pueblo of Nambe http://www.epa. gov/waterscienc e/standards/wqsl ibr ary/tribes/na mbe_ween_6_w qs.pdf TURBIDITY

Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU or less, or increase more than 10 percent when the backgroun d turbidity is more than 50 NTU

. High Quality Coldwater Fishery Use

- Turbidity must not exceed 10 NTU ( 25 NTU in certain reaches where natural background prevents attainment of lower turbidity).

Primary Contact

- Turbidity shall not excee d 25 NTU

. NITROGEN Hig h Quality Coldwater Fishery Use

- Total inorganic Nitrogen (as N) shall not exceed 1.0 mg/L

Recharge of Domestic Water Supply

– Nitrates must not exceed 10.0 mg/L PHOSPHORUS Hig h Quality Coldwater Fishery Use

- Total phosphorus mus t not exceed 0.1 mg/L

Pueblo of Picuris http://www.epa. gov/waterscienc e/standards/wqsl ibrary/tribes/pic uris_6_wqs.pdf TOTAL DISSOLVED

SOLIDS Total dissolved solids of mineral constituents must not exceed 500 mg/L

. TURBIDITY Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 3 0 NTU or less, or increase more than 10 percent when the backgroun d turbidity is more than 30 NTU

. High Quality Coldwater Fishery , Primary Contact Use

- Turbidity must not exceed 10 NTU ( 25 NTU in certain reaches where natural background prevents attainment of lower turbidity). Primary Contact

- Turbidity shall not exceed 10 NTU

. NITROGEN Hig h Quality Coldwater Fishery Use

- Total inorganic Nitrogen (as N) shall not exceed 1.0 mg/L

Recharge of Domestic Water Supply

– Nitrates must not exceed 10.0 mg/L PHOSPHORUS Hig h Quality Coldwater Fishery Use

- Total phosphorus must not exceed 0.1 mg/L

Pueblo of Pojoaque http://www.epa. gov/waterscienc e/standards/wqsl i brary/tribes/poj oaque_6_wqs.p TURBIDITY

Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU or less, or increase more than 10 percent when the backgroun d turbidity is more than 50 NTU

. Primary contact

– Turbidity must not exceed 25 NTU

. NITROGEN: Segments Des i gnated for Groundwater Recharge

- Total Nitrates, as N,
must not exceed 10.0 mg/L

.df F or uses and stand ards for designated waterbodies, s ee: http://www.epa.gov/waterscience/standards/wqslibrary/tribes/p ojoaque_6_wqs.pdf

.

Pueblo of Sandia http://www.epa. gov/waterscienc e/standards/wqs l ibrary/tribes/san dia_6_wqs.pdf TURBIDITY

Turbidity shall not exceed 5 NTU over background turbidity when th e background turbidity is 50 NTU or less, or increase more than 10 percent when the backgroun d turbidity is more than 50 NTU

.

F or uses and stand ards for designated waterbodies, s ee: http://www.epa.gov/waterscience/standards/wqslibrary/tribes/sa ndia_6_wqs. pdf

. PHOSPHORUS: As a guideline, total phosphorus shall not exceed 100 ug/ l iter in
stream or 50 ug/liter in lakes and reservoirs

.

Pueblo of Santa Clara http://www.epa. gov/waterscienc e/standards/wqsl ibrary/tribes/san ta_clara_6_wqs. pdf TOTAL DISSOLVED

SOL IDS Primary Contact

- Total dissolved solids of mineral constituents must not exceed 500 mg/L

. TURBIDITY Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU or less, or increase more than 10 percent when the b ackgroun d turbidity is more than 50 NTU

. Fish Culture and High

- Quality Cold Water Fisheries

- Turbidity must be less than 10 NTU , except in certain reaches where natural background conditions prevent attainment of lower turbidity. In that instance, turbid ity shall be less than 25 NTU.

Primary contact

- Turbidity
must not exceed 25 NTUs

. PHOSPHORUS Fish Culture and Hi gh

- Quality Cold Water Fisheries

- Total phosphorus must not exceed 0.1 mg/L

.

Pueblo of Taos http://www.epa. TURBIDITY

Drinking Water

– Turbidity must not exceed 5 NTU

. NITROGEN Drinking Water Standards

- Nitrite must not exceed 1,000 ug/L.gov/waterscienc e/standards/wq sl ibrary/tribes/tao

s

- 200606.pdf High Quality Cold Water Fishery

– Turbidity must not exceed

10 NTU

. Nitrate + Nitrite must not exceed 10,000 ug/L. Domestic Water Supply

- Nitrate must not exceed 10,000 ug/L

.

Pueblo of Tesuque http://www.epa. gov/waterscienc e/standards/wqsl ibrary/tribes/tes uque_6_wqs.pdf TURBIDITY

Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU or less, or increase more than 10 percent when the backgroun d turbidity is more than 50 NTU

. High Quality Coldwater Fishery Use

- Turbidity must not exceed to 10 NTU ( 25 NTU in certain reaches where natural background p revents attainment of lower turbidity).

Primary Contact

- Turbidity must not exceed 25 NTUs

. NITROGEN High Quality Coldwater Fishery Use

- Total inorganic nitrogen
must not exceed 1.0 mg/L

. Groundwater Recharge

- Nitrates must not exceed 10.0 mg/L. P HOSPHORUS High Quality Coldwater Fishery Use

- Total phosphorus must not exceed 0.1 mg/L

.

8 Confederated

Salish and Kootenai Tribes of the Flathead Reservation http://www.epa. gov/waterscienc e/standards/wqsl ibrary/tribes/sali sh_kootenai_8_ wqs.pdf TURBIDIT Y

A

- Closed and A

- 1 Waters

- No discharge allowed 1

. B

- 1 and C

- 1 Waters

- No turbidity increase over 5 NTU above background conditions. B

- 2, B

- 3, C

- 2, and C

- 3 Waters

– No turbidity increase over 10 NTU above back ground conditions. NARRATIVE STANDARD ONLY

Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation http://www.epa. gov/waterscienc e/standards/wqsl ibrary/tribes/fort _peck_8_wqs.p df See Fort Peck Tribe Numeric Water Quality Standards:

http://www.ep a.gov/waterscience/standards/wqslibrary/tribes/fo rt_peck_8_wqs.pdf See Fort Peck Tribe Numeric Water Quality Standards: http://www.epa.gov/waterscience/standards/wqslibrary/tribes/fort_pec k_8_wqs.pdf

9 The Island of TURBIDITY NITROGE N PHOSPHORUSAmerican Samoa http://www.epa.g ov/wate rscience/s tandards/wqslibra ry/terri tories/ame rican_samoa_9_ wqs.pdf Fresh Surface Waters

- Turbidity average not to exceed 5 NTU

.

Embayments

- Turbidity average not to exceed 0.35 NTU

. Pago Pago Harbor

- Turbidity average not to exceed 0.75 NTU

. E mbayments

– Fagatele Bay and Pala Lagoon

- Turbidity average not to exceed 0.25 NTU (Fagatele Bay) and 0.75 NTU (Pala Lagoon). Open Coastal Waters

- Turbidity average not to exceed 0.25 NTU. Ocean Waters

- Turbidity average not to exceed 0.20 NTU

. Fresh Surface Waters

- Total Nitrogen average must not exceed 300 mg/l as N. Embayments

- Total Nitrogen
average must not exceed 150.0 mg/l as N. Pago Pago Harbor

- Total Nitrogen average must not exceed 200 mg/l as N. Embayments

– Fagatele Bay and Pala Lagoon

- Total Nitrogen
average must not exceed 135 mg/l as N. Open Coastal Waters

- Total Nitrogen average must not exceed 130.0 mg/l as N. Ocean Waters

- Total Nitrogen
average must not exceed 115.0 mg/l as N. Fresh Surface Waters

- Total Phos phorus average must not exceed 150 mg/l as P. Embayments

- Total Phosphorus
average must not exceed 20.0 mg/l as P. Pago Pago Harbor

- Total Phosphorus average must not exceed 30.0 mg/l as P. Embayments

– Fagatele Bay and Pala Lagoon

- Total Phosphorus

ave rage must not exceed 15 mg/l as P. Open Coastal Waters

- Total Phosphorus average must not exceed 15.0 mg/l as P. Ocean Waters

- Total Phosphorus
average must not exceed 11.0 mg/l as P.

The Island of Guam http://node.gua me pa.net/programs/ water/WQS.pdf T OTAL NON

FILTERABLE SUSPENDED SOLIDS M

- 1 and S

- 1 Waters

– Must not exceed 5 mg/L , except when due to natural conditions.

M

- 2 and S

- 2 Waters

– Concentrations must not be increased by more then 10% from background, and the total concentration must not

excee d 20 mg/L , except when due to natural conditions.

M

- 3 and S

- 3 Waters

– Concentrations must not be increased by more than 25% from background ,and the TURBIDITY M

- 1 and S

- 1 Waters

– No turbidity increase over 0.5 NTU above background

, except when due to natural conditions.

M

- 2, M

- 3, S

- 2, and S

- 3 Waters

– No turbidity increase

over 1.0 NTU above background, except when due to natural conditions. NITROGEN Groundwater Quality

– Nitrate 10 mg/L ; Nitrite 1 mg/L

M

- 1 and S

- 1 Waters

- Nitrate

nitrogen shall not exceed 0.10 mg/l

.

M

- 2 and S

- 2 Waters

- Nitrate

nitrogen shall not exceed 0.20 mg/l

.

M

- 3 and S

- 3 Waters

- Nitrate

nitrogen shall not exceed 0.50 mg/l

. PHOSPHORUS M

- 1 and S

- 1 Waters

- Orthophosphate must not exceed 0.024 mg/l

.

M

- 2 and S

- 2 Waters

- Orthophosphate must not exceed 0.05 mg/l

.

M

- 3 and S

- 3 Waters

- Orthophosphate must not exceed 0.10 mg/l

.total concentration must not exceed 40 mg/L , except when due to natural conditions. Johnston Atoll NO WATER QUALITY STD NO WATER QUALITY STD Midway Isla nd and Wake NO WATER QUALITY STD NO WATER QUALITY STD

Commonwealth of the Northern Mariana Islands http://www.epa.g ov/waterscience/s tandards/wqslibra ry/territories/nort hern_mariana_9_ wqs.pdf TOTAL FILTERABLE

SUSPENDED SOLIDS AA, 1 Waters

– Concentration s must not be increased above background conditions at any time, and should not exceed 5 mg/L except due to natural conditions. A, 2 Waters

– Concentrations must not be increased above background conditions at any time, and should not exceed 40 mg/L except due to natural conditions. TURBIDITY AA, 1 Waters

– No turbidity increase over 0.5 NTU above background conditions

. A, 2 Waters

– No t urbidity increase over 1.0 NTU above background conditions

. PHOSPHORUS AA Waters

- Orthophosphate concentration must no t exceed 0.025 mg/l

. Total Phosphorus must not exceed 0.024 mg/l

. A Waters

- Orthophosphate concentration must not exceed 0.05 mg/l

. Total Phosphorus must not exceed 0.05 mg/l

. 1, 2 Waters

- Orthophosphate must not exceed 0.10 mg/l

. Total Phosphorus must n ot exceed 0.10 mg/l

.

NITROGEN AA Waters

- Nitrate

- Nitrogen concentration must not exceed 0.20 mg/l

. Total Nitrogen concentration must not exceed 0.4 mg/l

. A Waters

- Nitrate

- Nitrogen must not exceed 0.50 mg/l

. A, 1 Waters

- Total Nitrogen must not exceed 0 .75 mg/L

. 2 Waters

- Total Nitrogen must not exceed 1.50 mg/l

.
Navajo Reservation http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/navajo.p df SUSPENDED SOLIDS

The following water quality standards for suspended solids concentration, are expres sed as a median value determined from a minimum of four samples C ollected at least 7 days apart. A suspended solids sample collected during or within 48 hours of a local precipitation event shall not be

use d to determine the median value. A&WHbt (warm wate r)

– 80 mg/L A&WHbt (cold water)

– 25 mg/L TURBIDITY Turbidity shall not exceed 10 NTU over background turbidity when the background turbidity is 50 NTU or less, or increase more than 20 percent when the backgroun d turbidity is more than 50 NTU

. NITROGEN PrHC Deep, Shallow, and Sedimentary Lake

– Total nitrogen numeric target 1.2

– 1.4 mg/L

. PrHC Igneous Lake

– Total nitrogen numeric target 1.5

– 1.7 mg/L

. A&WHbt (cold water)

– Total nitrogen numeric target 1.0

– 1.4 mg/L

. A&WHbt (warm water)

– Total nitro gen numeric target 1.6

– 1.8 mg/L

. Dom

– Total nitrogen numeric target 1.2

– 1.5 mg/L

. Domestic Water Supply

– Nitrate must not exceed 10,000 ug/L ; Nitrite must not exceed 1000 PHOSPHORUS PrHC Deep and Shallow Lake

– Total phosphorus numeric target 70

– 90 ug/L

. PrHC Igneous and Sedimentary Lake

– Total phosphorus numeric target 100

– 125 ug/L

. A&WHbt (cold water)

– 50

– 90 ug/L

. A&WHbt (wa rm water)

– 115

– 140 ug/L

. Dom

– 70

– 100 ug/L

.ug/L

. Primary and Secondary Human Contact

– Nitrate must not exceed 1493330 ug/ L ; Nitrite must not exceed 93330 ug/L

.
Big Pine Paiute Tribe of the Owens Valley http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/bigpine

200601.pdf SUSPENDED MATERIALS

Natural High Quality Waters

– Concentration must not be altered to the extent that such alterations are discernible at the 10% significance level. TURBIDITY Must not increase more than 10% above natural levels. NITROGEN Nitrate (as NO3) must not exceed 10 mg/L

. Nitrite (as nitrogen) must not exceed 1 mg/L

. Nitrite ( as nitrogen) must not exceed 0.05 mg/L

.

Bishop Paiute Tribe http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/bishop.p df TURBIDITY

Must not increase more than 10% above natural levels. F or uses and stand ards for designated waterbodies, s ee : ht tp://www.epa.gov/waterscience/standards/wqslibrary/tribes/bishop.p df

Hoopa Valley Tribe http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/hoopa_v alley.pdf NOT YET ESTABLISHED F or uses and stand ards for designated waterbodies, s ee : http://www.ep a.gov/waterscience/standards/wqslibrary/tribes/hoopa_v alley.pdf

Hopi Tribe http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/hopi.pdf TURBIDITY

Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU o r less, or increase more than 10 percent when the backgroun d turbidity is more than 50 NTU

. NITROGEN Narrative Standard Only PHOSPHORUS As a guideline, total phosphorus must not exceed 100 ug/L instream or 50 ug/L in lakes and reservoirs, except in certai n circumstances. Pyramid Lake Paiute Tribe http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/ca9_pyr F or uses and stand ards for designated waterbodies, s ee :

http://www.epa.gov/waterscience/standards/wqslibrary/tribes/ca 9_pyramid.pdf F or uses and stand ards for designated waterbodies, s ee : http://www.epa.gov/waterscience/standards/wqslibrary/tribes/ca9_pyra mid.pdfamid.pdf White Mountain Apache http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/white_m ountain_9_wqs.p df TURBIDITY

Turbidit y shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU or less, or increase more than 10 percent when the backgroun d turbidity is more than 50 NTU

. High

- quality coldwater habitat, including cold water fish hatchery

– Tu rbidity must be less than 10 NTU , except when due to natural conditions. Untreated drinking water

– Turbidity must not exceed 10 NTU

. Primary contact

– Turbidity must not exceed 25 NTU

. Secondary contact recreational

– Turbidity must be less than 50 NTU i n river systems and 25 NTU in lakes. NITROGEN Domestic/industrial water supply

– Total nitrate must not exceed 10.0 mg/L

. PHOSPHORUS Coldwater habitat, including coldwater fish rearing, and high quality coldwater habitat, including cold water fish hatcher y

– Total phosphorus must be less than 0.1 mg/L

.

10 Idaho

http://adm.idaho. gov/adminrules/r ules/idapa58/010 2.pdf TURBIDITY

Turbidity, below any applicable mixing zone set by the Department, shall not exceed background turbidity by more than 50 NTU instan taneously or more than 25 NTU for more than 10 consecutive days. Surface Water Quality Criteria for Water Supply Use Designations

– Turbidity as measured at the public water intake shall not be: 1) Increased by more than 5 NTU above natural background, mea sured at a location upstream from or not influenced by any human induced nonpoint source activity, when background turbidity is 50 NTU or less; 2) Increased by more than 10% above natural background, measured at a location upstream form or not influenced b y any human induced nonpoint source activity, not to exceed 25 NTU when background turbidity is greater than 50 NTU

. Point Source Wastewater Treatment Requirements

– The wastewater must not increase the turbidity of the receiving water outside the mixing z one by: a) More than 5 NTU over background turbidity, when background turbidity is 50 NTU or less; or b) More than 10% increase in turbidity when background turbidity is more than 50 NTU , not to exceed a maximum increase of 25 NTU

. NARRATIVE STANDARD ONLY

Confederated Tribes of the Chehalis TURBIDITY

Class AA & A Wat ers

- Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU NONEReservation http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/chehalis _10_wqs.pdf or less, or have more than a 10 percent increase in turbidity

when the background turbidity is more than 50 NTU

.

Class B Waters

- 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

. Confederated Tribes of the Colville Reservation http://ecfr.gpoacc ess.gov/cgi/t/text/
text

- idx?c=ecfr&rgn= div5&view=text &node=40:21.0.1 .1.18&idno=40#4 0:21.0.1.1.18.4.1 6.5 TUR BIDITY

Class I & II Waters

- 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

. Class III & IV Waters

- 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. L akes & Special Resource Waters

- Turbidity shall not exceed 5 NTU over natural conditions. NONE

Confederated Tribes of the Umatilla Reservation of Oregon http://www.epa.g ov/waterscience/s tandards/w qslibra ry/tribes/umatilla. pdf TURBIDITY

Must not increase by more than 10 percent over natural conditions as measured relative to a control point immediately upstream of any or all turbidity causing activities will not be allowed. NONE

Confederate d Tribes of the Warm Springs Reservation of Oregon http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/warmspr TURBIDITY

Must not increase by mor e than 10 percent over natural conditions as measured relative to a control point immediately upstream of any or all turbidity causing activities will not be allowed. NONEings.pdf

Kalispel Indian Reservation http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/kalispel. pdf TURBIDITY

Brown Trout Spawning Waters

- 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

. These criteria shall apply between October 1 and March 1 although site

- specific designations may apply at other times:... Adult Salmonid Migration Waters

- Turbidity shall not exceed 5 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

. NONE

Lummi Indian Reservation http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/lummi.p df TURBIDITY

Class AA & A Waters

- Turbidity shall not exceed 5 NTU over background turbidity when th e 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

. Class B Waters

- Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 5 0 NTU or less, or have more than a 20 percent increase in turbidity when the background turbidity is more than 50 NTU

. Lake Class

- No turbidity increase over 5 NTU over background conditions. NARRATIVE STANDARD ONLY

Makah Tribe http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/makah.p df TURBIDITY

Freshwater Aquatic Life

- Turbidity shall not exceed (i) 5 NTU over background when the background is 50 NTU or less; or (ii) A 10 percent increase in turbidity when the background turbidity is more than 50 NTU

. Marine Aquatic Life, for Extraordinary & Excellent Quality Waters

- Turbidity shall not exceed: (i) 5 NTU over background when the background is 50 NTU or less; or (ii) Have more than

a 10 percent increase in turbidity when the background turbidity is more than 50 NTU

. Marine Aquatic Life, for Good Quality Waters

- Turbidity shall not exceed: (i) 10 NTU over background when the background is 50 NTU or less; o r (ii) A 20 percent increase in turbidity when the background turbidity is more than 50 NTU

. 

### Recreation

– No t urbidity increase over 5 NTU Narrative Standard : Nutrients or other substances from anthropogenic causes shall not be present in concentrations which will produce objectionable algal densities or nuisance aquatic vegetation, result in a dominance of nuisance species, result in acute toxicity to any aquatic biota or wildlife, adversely affect public health or safety,

or otherwise cause nuisance conditions.

### above background conditions.
Port Gamble S’Klallam Tribe http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/s

klallam

- 10

- wqs.pdf TURBI DITY

Domestic Water Supply

- Turbidity shall not exceed 1 NTU over natural background levels when the natural background turbidity is 10 NTU or have more than a 10 percent increase in turbidity when the natural background level is more than 10 NTU . Natur al background turbidity for implementing this criteria is to represent the 90 th percentile value of the annual average turbidity. Aquatic Life Criteria

- Turbidity shall not exceed 5 NTU over natural background levels when the natural background turbidity is 50 NTU or less, or have more than a 10 percent increase in turbidity when the natural background level is more than 50 NTU . Natural background turbidity for implementing this criteria is to represent the 90 th percentile value of the annual average tur bidity. NARRATIVE STANDARD ONLY

Puyallup Tribe of Indians http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/puyallup _10_wqs.pdf TURBIDITY

High Quality Waters

- 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

. Good/Fair Quality Waters

- 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

. Lakes

- No turbidity increase over 5 NTU ab ove background conditions. NONE

Spokane Tribe http://www.epa.g ov/waterscience/s tandards/wqslibra ry/tribes/spokane. pdf NARRATIVE STANDARD ONLY PHOSPHORUS Nutrient Criteria for Lakes

- Trophic State If

Ambient TP Range of Lake is: Then

Criteria Should be Set

Ultra

oligotrop hic 0

- 4 4 or less

Oligotro phic >4

- 10 10 or

lessLower mesotrop hic >10

- 20 20 or

less

Upper mesotrop hic >20

- 35 35 or

less