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Summary of State Information

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Last updated on Tuesday, August 14, 2012

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

1 of 31 8/14/2012 9:06 AM
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Assessment

Summary

Water Quality

by Waterbody

Type

Rivers

and

Streams

Lakes,

Reservoirs,

and Ponds

Bays and

Estuaries

Coastal

Shoreline

Ocean

and Near

Coastal

Wetlands

Great

Lakes

Shoreline

Great

Lakes

Open

Water

Causes of

Impairment

Probable

Sources

Contributing to

Impairments

Previously

Impaired

Waters Now

Attaining All

Uses

Impaired

Waters Listed

by State

Cumulative

TMDLs by

Pollutant

Approved

TMDLs by State

Cumulative

Number of

TMDLs

Status of

Available Data

Used in This

Report

For More

Information:

Download Excel

compatible information

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Explorer only)

National Summary of State

Information

Depicted below are national summary tables and charts for

available water quality data reported by the States to EPA

under Section 305(b) and 303(d) of the Clean Water Act.

This report displays the most current available reporting

year data.

Check the Status of Available Data for more information.

Frequent Questions

About This Database

(Integrated Report)

About This Database

(Separate Impaired and

Assessed Waters Reports)

Assessing Water Quality

(Questions and Answers)

Integrated Reporting

Guidance

Previous National Water

Quality Reports

EnviroMapper for Water

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Surveys

Statistical Survey

Template (Excel, 585 KB)

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

2 of 31 8/14/2012 9:06 AM
Assessed Waters of United States

Incomplete state reported information may lead to discrepancies and/or missing information in these

reports.

Description of this table

Size of Water

Rivers

and

Streams

(Miles)

Lakes,

Reservoirs,

and Ponds

(Acres)

Bays and

Estuaries

(Square

Miles)

Coastal

Shoreline

(Miles)

Ocean

and

Near

Coastal

(Square

Miles)

Wetlands

(Acres)

Great

Lakes

Shoreline

(Miles)

Great

Lakes

Open

Water

(Square

Miles)

Good

Waters 449,972 5,868,017 11,076 1,746 968 208,944 78 62

Threatened

Waters 6,369 38,681 17 805

Impaired

Waters 514,816 13,038,033 21,575 7,263 1,016 1,107,261 4,353 53,270

Total

Assessed

Waters

971,156 18,944,731 32,668 9,010 1,984 1,317,011 4,431 53,332

Total Waters 3,533,205 41,666,049 87,791 58,618 54,120 107,700,000 5,202 60,546

Percent of

Waters

Assessed

27.5 45.5 37.2 15.4 3.7 1.2 85.2 88.1

States Using a Statewide Statistical Survey

Some states submit statewide statistical survey data, which use

representative random samples to characterize the condition of an entire

waterbody type. Statewide statistical survey data is not currently included in

these summary tables.

Number of States

Rivers and Streams Lakes as Acres Bays and Estuaries

7 4 2

Summary of Water Quality Assessments for Each Waterbody Type

National Summary

Water Quality Attainment in Assessed Rivers and Streams

Description of this table Description of this table

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

3 of 31 8/14/2012 9:06 AM
Assessed Status Miles

Assessed 971,156

Unassessed 2,562,049

Total Miles 3,533,205

Attainment Status

Good

Threatened

Impaired

Total Miles Assessed

National Summary

Designated Use Support in Assessed Rivers and Streams*

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table

Designated Use Group Miles

Assessed

Percent

Good

Percent

Threatened

Percent

Impaired

% Good

% Threatened

% Impaired

Fish, Shellfish, And

Wildlife Protection And

Propagation

762,113 55.0 .5 44.5

Recreation 390,972 55.3 1.4 43.3

Agricultural 352,368 93.7 .6 5.8

Aquatic Life Harvesting 262,191 34.1 .3 65.6

Industrial 210,190 93.3 .0 6.7

Public Water Supply 187,694 73.9 .8 25.3

Other 99,646 84.5 .3 15.3

Aesthetic Value 26,074 88.8 .0 11.2

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

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Exceptional Recreational

Or Ecological

Significance

14,663 11.3 4.4 84.4

National Summary

Causes of Impairment in Assessed Rivers and Streams

Description of this table

Cause of Impairment Group

Miles

Threatened or

Impaired

Pathogens 157,844

Sediment 106,057

Nutrients 101,269

Organic Enrichment/Oxygen Depletion 87,700

Polychlorinated Biphenyls (PCBs) 76,405

Habitat Alterations 75,578

Metals (other than Mercury) 72,335

Mercury 61,995

Flow Alteration(s) 50,479

Temperature 50,166

Cause Unknown 39,587

Cause Unknown - Impaired Biota 37,793

Salinity/Total Dissolved Solids/Chlorides/Sulfates 32,515

pH/Acidity/Caustic Conditions 29,330

Turbidity 28,126

Pesticides 17,097

Other Cause 17,082

Ammonia 12,701

Fish Consumption Advisory 10,029

Algal Growth 7,492

Total Toxics 7,226

Toxic Inorganics 6,834

Toxic Organics 4,886

Dioxins 4,318

Oil and Grease 2,740

Cause Unknown - Fish Kills 1,371

Nuisance Exotic Species 1,236

Taste, Color and Odor 934

Radiation 652

Chlorine 629

Noxious Aquatic Plants 295

Trash 238

Nuisance Native Species 127

Biotoxins 84

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

5 of 31 8/14/2012 9:06 AM
National Summary

Probable Sources of Impairments in Assessed Rivers and Streams

Description of this table

Probable Source Group

Miles

Threatened or

Impaired

Agriculture

123,669

Atmospheric Deposition 101,015

Unknown 87,600

Hydromodification 58,915

Urban-Related Runoff/Stormwater 51,548

Natural/Wildlife 51,396

Municipal Discharges/Sewage 50,813

Unspecified Nonpoint Source 46,985

Habitat Alterations (Not Directly Related To

Hydromodification) 32,415

Resource Extraction 26,264

Silviculture (Forestry) 19,444

Industrial 14,200

Construction 13,522

Other 10,179

Land Application/Waste Sites/Tanks 8,277

Legacy/Historical Pollutants 4,889

Spills/Dumping 2,420

Recreation And Tourism (Non-Boating) 1,741

Aquaculture 318

Groundwater Loadings/Withdrawals 178

Recreational Boating And Marinas 132

Military Bases 42

National Summary

Water Quality Attainment in Assessed Lakes, Reservoirs, and Ponds

Description of this table Description of this table

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

6 of 31 8/14/2012 9:06 AM
Assessed Status Acres

Assessed 18,944,731

Unassessed 22,721,318

Total Acres 41,666,049

Attainment Status

Good

Threatened

Impaired 13,038,0

Total Acres Assessed 18,944,7

National Summary

Designated Use Support in Assessed Lakes, Reservoirs, and Ponds*

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table

Designated Use Group Acres

Assessed

Percent

Good

Percent

Threatened

Percent

Impaired

% Good

% Threatened

% Impaired

Aquatic Life Harvesting 10,815,405 25.0 .5 74.5

Fish, Shellfish, And

Wildlife Protection And

Propagation

10,713,506 54.7 .3 45.0

Recreation 9,033,391 74.5 2.4 23.1

Public Water Supply 7,081,262 76.3 .6 23.1

Agricultural 5,346,340 90.4 .7 8.8

Industrial 4,395,330 89.1 .1 10.8

Other 3,210,515 69.7 .3 30.0

Aesthetic Value 1,203,376 52.9 .0 47.1

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

7 of 31 8/14/2012 9:06 AM
Exceptional

Recreational Or

Ecological Significance

732,768 16.1 15.6 68.3

National Summary

Causes of Impairment in Assessed Lakes, Reservoirs, and Ponds

Description of this table

Cause of Impairment Group

Acres

Threatened or

Impaired

Mercury

7,449,617

Nutrients 3,567,824

Polychlorinated Biphenyls (PCBs) 2,839,876

Organic Enrichment/Oxygen Depletion 1,732,490

Metals (other than Mercury) 1,525,067

Turbidity 1,372,857

Algal Growth 1,220,553

pH/Acidity/Caustic Conditions 886,936

Sediment 718,144

Nuisance Exotic Species 680,604

Flow Alteration(s) 548,980

Pathogens 544,163

Fish Consumption Advisory 488,727

Salinity/Total Dissolved Solids/Chlorides

/Sulfates 481,009

Habitat Alterations 443,402

Pesticides 352,495

Nuisance Native Species 272,318

Other Cause 270,437

Ammonia 210,127

Temperature 202,660

Taste, Color and Odor 147,143

Dioxins 119,568

Toxic Organics 94,686

Cause Unknown 60,496

Cause Unknown - Impaired Biota 58,062

Radiation 48,312

Noxious Aquatic Plants 45,734

Total Toxics 23,556

Biotoxins 17,258

Toxic Inorganics 8,035

Cause Unknown - Fish Kills 6,457

Trash 1,717

Oil and Grease 1,274

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

8 of 31 8/14/2012 9:06 AM
National Summary

Probable Sources of Impairments in Assessed Lakes, Reservoirs, and Ponds

Description of this table

Probable Source Group

Acres

Threatened or

Impaired

Atmospheric Deposition

4,804,255

Unknown 3,199,313

Agriculture 1,821,113

Natural/Wildlife 1,355,736

Hydromodification 907,651

Other 867,056

Urban-Related Runoff/Stormwater 858,186

Municipal Discharges/Sewage 813,637

Legacy/Historical Pollutants 769,768

Unspecified Nonpoint Source 759,087

Resource Extraction 563,235

Habitat Alterations (Not Directly Related To

Hydromodification) 360,800

Construction 319,470

Silviculture (Forestry) 242,583

Industrial 224,021

Spills/Dumping 194,422

Recreational Boating And Marinas 126,413

Commercial Harbor And Port Activities 109,240

Recreation And Tourism (Non-Boating) 107,766

Groundwater Loadings/Withdrawals 98,032

Land Application/Waste Sites/Tanks 77,106

Aquaculture 4,620

Military Bases 2,436

National Summary

Water Quality Attainment in Assessed Bays and Estuaries

Description of this table Description of this table

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

9 of 31 8/14/2012 9:06 AM
Assessed Status Square Miles

Assessed 32,668

Unassessed 55,122

Total Square Miles 87,791

Attainment Status Square Mil

Good

Threatened

Impaired

Total Square Miles Assessed

National Summary

Designated Use Support in Assessed Bays and Estuaries*

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table

Designated Use Group

Square

Miles

Assessed

Percent

Good

Percent

Threatened

Percent

Impaired

% Good

% Threatened

% Impaired

Aquatic Life Harvesting 24,314 31.8 .1 68.1

Fish, Shellfish, And

Wildlife Protection And

Propagation

19,409 52.1 .1 47.8

Recreation 13,827 91.5 .0 8.5

Agricultural 3,807 96.1 .0 3.9

Industrial 3,766 96.1 .0 3.9

Other 3,432 92.7 .0 7.3

Exceptional

Recreational Or

Ecological Significance

533 .8 .0 99.2

Public Water Supply 328 47.8 .0 52.2

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

10 of 31 8/14/2012 9:06 AM
Aesthetic Value 114 86.6 .0 13.4

National Summary

Causes of Impairment in Assessed Bays and Estuaries

Description of this table

Cause of Impairment Group

Square Miles

Threatened or

Impaired

Mercury 10,232

Pathogens 6,581

Polychlorinated Biphenyls (PCBs) 6,483

Organic Enrichment/Oxygen Depletion 5,217

Dioxins 3,896

Metals (other than Mercury) 1,975

Noxious Aquatic Plants 1,855

Pesticides 1,778

Algal Growth 1,412

Cause Unknown - Impaired Biota 1,160

Toxic Organics 925

Nutrients 882

Other Cause 782

Turbidity 378

Total Toxics 316

Flow Alteration(s) 299

Habitat Alterations 262

Sediment 199

Nuisance Exotic Species 92

pH/Acidity/Caustic Conditions 92

Cause Unknown 53

Temperature 35

Trash 31

Ammonia 31

Oil and Grease 16

Toxic Inorganics 6

Taste, Color and Odor 6

Salinity/Total Dissolved Solids/Chlorides/Sulfates 5

National Summary

Probable Sources of Impairments in Assessed Bays and Estuaries

Description of this table

Probable Source Group

Square Miles

Threatened or

Impaired

Atmospheric Deposition

7,530

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

11 of 31 8/14/2012 9:06 AM
Unknown 5,447

Municipal Discharges/Sewage 4,406

Natural/Wildlife 4,225

Industrial 3,760

Other 3,630

Agriculture 3,028

Unspecified Nonpoint Source 2,607

Hydromodification 2,513

Habitat Alterations (Not Directly Related To

Hydromodification) 2,057

Urban-Related Runoff/Stormwater 1,877

Legacy/Historical Pollutants 1,469

Resource Extraction 1,292

Recreational Boating And Marinas 1,053

Commercial Harbor And Port Activities 470

Groundwater Loadings/Withdrawals 158

Land Application/Waste Sites/Tanks 52

Spills/Dumping 26

Construction 16

Land Application/Waste Sites 1

Recreation And Tourism (Non-Boating) 0

Silviculture (Forestry) 0

Aquaculture 0

National Summary

Water Quality Attainment in Assessed Coastal Shoreline

Description of this table Description of this table

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

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Assessed Status Miles

Assessed 9,010

Unassessed 49,608

Total Miles 58,618

Attainment Status

Good

Threatened

Impaired

Total Miles Assessed

National Summary

Designated Use Support in Assessed Coastal Shoreline*

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table

Designated Use Group Miles

Assessed

Percent

Good

Percent

Threatened

Percent

Impaired

% Good

% Threatened

% Impaired

Aquatic Life Harvesting 8,027 14.8 .0 85.2

Recreation 2,183 78.6 .0 21.4

Fish, Shellfish, And

Wildlife Protection And

Propagation

1,516 75.4 .0 24.6

Other 680 73.9 .0 26.1

Exceptional Recreational

Or Ecological

Significance

328 80.1 .0 19.9

Industrial 308 78.2 .0 21.8

Aesthetic Value 235 100.0 .0 .0

Agricultural 50 .0 .0 100.0

Public Water Supply 49 .0 .0 100.0

National Summary

Causes of Impairment in Assessed Coastal Shoreline

Description of this table

Cause of Impairment Group

Miles

Threatened or

Impaired

Mercury 6,473

Pathogens 1,114

Organic Enrichment/Oxygen Depletion 423

Metals (other than Mercury) 214

Turbidity 129

Nutrients 123

Algal Growth 91

Pesticides 71

Cause Unknown - Impaired Biota 70

pH/Acidity/Caustic Conditions 69

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

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Other Cause 65

Polychlorinated Biphenyls (PCBs) 35

Ammonia 21

Temperature 20

Toxic Organics 13

Oil and Grease 13

Sediment 5

National Summary

Probable Sources of Impairments in Assessed Coastal Shoreline

Description of this table

Probable Source Group

Miles

Threatened or

Impaired

Unknown 427

Atmospheric Deposition 388

Municipal Discharges/Sewage 326

Urban-Related Runoff/Stormwater 270

Agriculture 142

Hydromodification 136

Industrial 127

Unspecified Nonpoint Source 120

Natural/Wildlife 100

Recreational Boating And Marinas 36

Other 34

Construction 23

Commercial Harbor And Port Activities 20

Recreation And Tourism (Non-Boating) 20

Spills/Dumping 13

Land Application/Waste Sites/Tanks 12

Resource Extraction 12

Legacy/Historical Pollutants 8

Aquaculture 5

National Summary

Water Quality Attainment in Assessed Ocean and Near Coastal

Description of this table Description of this table

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

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Assessed Status Square Miles

Assessed 1,984

Unassessed 52,136

Total Square Miles 54,120

Attainment Status Square Mil

Good

Threatened

Impaired

Total Square Miles Assessed

National Summary

Designated Use Support in Assessed Ocean and Near Coastal*

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table

Designated Use Group

Square

Miles

Assessed

Percent

Good

Percent

Threatened

Percent

Impaired

% Good

% Threatened

% Impaired

Recreation 1,537 98.0 .0 2.0

Fish, Shellfish, And

Wildlife Protection And

Propagation

1,329 59.0 .0 41.0

Aquatic Life Harvesting 1,270 38.3 .0 61.7

Other 476 57.8 .0 42.2

Agricultural 201 100.0 .0 .0

Public Water Supply 154 100.0 .0 .0

Exceptional

Recreational Or

Ecological Significance

99 100.0 .0 .0

Industrial 3 100.0 .0 .0

National Summary

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

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Causes of Impairment in Assessed Ocean and Near Coastal

Description of this table

Cause of Impairment Group

Square Miles

Threatened or

Impaired

Mercury 796

Organic Enrichment/Oxygen Depletion 579

Polychlorinated Biphenyls (PCBs) 531

Pesticides 525

Pathogens 80

Nuisance Exotic Species 35

Total Toxics 29

Turbidity 22

Metals (other than Mercury) 15

Toxic Organics 14

Habitat Alterations 10

Dioxins 9

Nutrients 7

pH/Acidity/Caustic Conditions 7

Temperature 1

Ammonia 1

National Summary

Probable Sources of Impairments in Assessed Ocean and Near Coastal

Description of this table

Probable Source Group

Square Miles

Threatened or

Impaired

Atmospheric Deposition 777

Unknown 560

Urban-Related Runoff/Stormwater 452

Municipal Discharges/Sewage 116

Recreational Boating And Marinas 9

Unspecified Nonpoint Source 7

Recreation And Tourism (Non-Boating) 4

Industrial 4

Hydromodification 4

Construction 3

Spills/Dumping 2

Natural/Wildlife 1

Commercial Harbor And Port Activities 0

National Summary

Water Quality Attainment in Assessed Wetlands

Description of this table Description of this table

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

16 of 31 8/14/2012 9:06 AM
Assessed Status Acres

Assessed 1,317,011

Unassessed 106,382,989

Total Acres 107,700,000

Attainment Status

Good

Threatened

Impaired

Total Acres Assessed 1,317,0

National Summary

Designated Use Support in Assessed Wetlands*

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table

Designated Use Group Acres

Assessed

Percent

Good

Percent

Threatened

Percent

Impaired

% Good

% Threatened

% Impaired

Fish, Shellfish, And

Wildlife Protection And

Propagation

1,310,226 15.6 .1 84.3

Recreation 1,135,615 51.7 5.9 42.4

Public Water Supply 543,566 88.3 .0 11.7

Exceptional Recreational

Or Ecological

Significance

141,544 8.3 44.6 47.2

Aquatic Life Harvesting 97,041 .3 .0 99.7

Industrial 82,390 23.1 .0 76.9

Other 67,123 1.1 .0 98.9

Agricultural 30,331 53.6 .6 45.7

National Summary

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

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Causes of Impairment in Assessed Wetlands

Description of this table

Cause of Impairment Group

Acres

Threatened or

Impaired

Organic Enrichment/Oxygen Depletion 926,402

Pathogens 476,087

Mercury 231,152

Metals (other than Mercury) 170,731

Habitat Alterations 107,432

Nutrients 68,593

Flow Alteration(s) 32,260

Toxic Inorganics 28,097

Total Toxics 12,659

Sediment 11,405

Salinity/Total Dissolved Solids/Chlorides/Sulfates 8,518

Temperature 7,680

Turbidity 4,089

Algal Growth 3,891

Nuisance Exotic Species 2,988

Cause Unknown - Impaired Biota 1,263

Cause Unknown 1,000

Fish Consumption Advisory 1,000

Cause Unknown - Fish Kills 997

Noxious Aquatic Plants 940

pH/Acidity/Caustic Conditions 838

Polychlorinated Biphenyls (PCBs) 707

Other Cause 678

Trash 458

Pesticides 362

Toxic Organics 133

Radiation 2

National Summary

Probable Sources of Impairments in Assessed Wetlands

Description of this table

Probable Source Group

Acres

Threatened or

Impaired

Unknown

707,582

Natural/Wildlife 563,032

Municipal Discharges/Sewage 464,479

Agriculture 369,637

Atmospheric Deposition 200,741

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

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Industrial 195,840

Hydromodification 109,024

Resource Extraction 94,719

Other 65,874

Unspecified Nonpoint Source 63,901

Construction 13,971

Habitat Alterations (Not Directly Related To

Hydromodification) 8,017

Groundwater Loadings/Withdrawals 3,045

Land Application/Waste Sites/Tanks 1,634

Recreation And Tourism (Non-Boating) 787

Urban-Related Runoff/Stormwater 2

Silviculture (Forestry) 2

National Summary

Water Quality Attainment in Assessed Great Lakes Shoreline

Description of this table

Assessed Status Miles

Assessed 4,431

Unassessed 772

Total Miles 5,202

Description of this table

Attainment Status

Good

Threatened

Impaired

Total Miles Assessed

National Summary

Designated Use Support in Assessed Great Lakes Shoreline*

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table

Designated Use Group Miles

Assessed

Percent

Good

Percent

Threatened

Percent

Impaired

% Good

% Threatened

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

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% Impaired

Aquatic Life Harvesting 4,064 .0 .0 100.0

Agricultural 3,131 100.0 .0 .0

Industrial 3,131 100.0 .0 .0

Other 3,131 100.0 .0 .0

Fish, Shellfish, And

Wildlife Protection And

Propagation

865 33.1 .0 66.9

Recreation 816 32.2 .0 67.8

Public Water Supply 336 100.0 .0 .0

National Summary

Causes of Impairment in Assessed Great Lakes Shoreline

Description of this table

Cause of Impairment Group

Miles

Threatened or

Impaired

Polychlorinated Biphenyls (PCBs) 3,472

Dioxins 2,963

Mercury 2,194

Pesticides 1,975

Pathogens 492

Nutrients 315

Nuisance Exotic Species 290

Sediment 290

Fish Consumption Advisory 285

Habitat Alterations 170

Other Cause 152

Organic Enrichment/Oxygen Depletion 120

Algal Growth 25

Toxic Inorganics 5

National Summary

Probable Sources of Impairments in Assessed Great Lakes Shoreline

Description of this table

Probable Source Group

Miles

Threatened or

Impaired

Atmospheric Deposition 3,400

Agriculture 536

Legacy/Historical Pollutants 427

Unknown 141

Municipal Discharges/Sewage 120

National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

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Land Application/Waste Sites/Tanks 31

Industrial 31

Unspecified Nonpoint Source 8

Hydromodification 7

Urban-Related Runoff/Stormwater 2

Natural/Wildlife 0

National Summary

Water Quality Attainment in Assessed Great Lakes Open Water

Description of this table

Assessed Status Square Miles

Assessed 53,332

Unassessed 7,214

Total Square Miles 60,546

Description of this table

Attainment Status Square Mil

Good

Threatened

Impaired

Total Square Miles Assessed

National Summary

Designated Use Support in Assessed Great Lakes Open Water*

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table

Designated Use Group Square Miles

Assessed

Percent

Good

Percent

Threatened

Percent

Impaired

% Good

% Threatened

% Impaired

Aquatic Life Harvesting 39,184 .0 .0 100.0

Agricultural 39,031 100.0 .0 .0

Industrial 39,031 100.0 .0 .0

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Other 39,031 100.0 .0 .0

Fish, Shellfish, And

Wildlife Protection And

Propagation

14,300 1.5 .0 98.5

Public Water Supply 151 100.0 .0 .0

Recreation 151 100.0 .0 .0

National Summary

Causes of Impairment in Assessed Great Lakes Open Water

Description of this table

Cause of Impairment Group

Square Miles

Threatened or

Impaired

Polychlorinated Biphenyls (PCBs) 39,183

Dioxins 38,862

Mercury 29,968

Pesticides 29,661

Fish Consumption Advisory 14,087

Organic Enrichment/Oxygen Depletion 13,867

Total Toxics 192

Nuisance Exotic Species 25

National Summary

Probable Sources of Impairments in Assessed Great Lakes Open Water

Description of this table

Probable Source Group

Square Miles

Threatened or

Impaired

Atmospheric Deposition 53,270

Legacy/Historical Pollutants 13,991

Urban-Related Runoff/Stormwater 13,867

Agriculture 4,373

Unknown 310

Other 25

National Causes of Impairment

Description of this table

NOTE: Click on a cause of impairment (e.g. algal growth) to see the specific state-reported causes that are

grouped to make up this category.

Cause of

Impairment

Group

Size of Assessed Waters with Listed Causes of Impairment

Rivers

and

Streams

(Miles)

Lakes,

Reservoirs,

and Ponds

(Acres)

Bays and

Estuaries

(Square

Miles)

Coastal

Shoreline

(Miles)

Ocean

and

Near

Coastal

(Square

Miles)

Wetlands

(Acres)

Great

Lakes

Shoreline

(Miles)

Great

Lakes

Open

Water

(Square

Miles)

Algal Growth 7,492 1,220,553 1,412 91 3,891 25

Ammonia 12,701 210,127 31 21 1

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Biotoxins 84 17,258

Cause Unknown 39,587 60,496 53 1,000

Cause Unknown -

Fish Kills 1,371 6,457 997

Cause Unknown -

Impaired Biota 37,793 58,062 1,160 70 1,263

Chlorine 629

Dioxins 4,318 119,568 3,896 9 2,963 38,862

Fish Consumption

Advisory 10,029 488,727 0 1,000 285 14,087

Flow Alteration(s) 50,479 548,980 299 32,260

Habitat Alterations 75,578 443,402 262 10 107,432 170

Mercury 61,995 7,449,617 10,232 6,473 796 231,152 2,194 29,968

Metals (other than

Mercury) 72,335 1,525,067 1,975 214 15 170,731

Noxious Aquatic

Plants 295 45,734 1,855 940

Nuisance Exotic

Species 1,236 680,604 92 35 2,988 290 25

Nuisance Native

Species 127 272,318

Nutrients 101,269 3,567,824 882 123 7 68,593 315

Oil and Grease 2,740 1,274 16 13

Organic

Enrichment/Oxygen

Depletion

87,700 1,732,490 5,217 423 579 926,402 120 13,867

Other Cause 17,082 270,437 782 65 678 152

Pathogens 157,844 544,163 6,581 1,114 80 476,087 492

Pesticides 17,097 352,495 1,778 71 525 362 1,975 29,661

pH/Acidity/Caustic

Conditions 29,330 886,936 92 69 7 838

Polychlorinated

Biphenyls (PCBs) 76,405 2,839,876 6,483 35 531 707 3,472 39,183

Radiation 652 48,312 2

Salinity/Total

Dissolved

Solids/Chlorides

/Sulfates

32,515 481,009 5 8,518

Sediment 106,057 718,144 199 5 11,405 290

Taste, Color and

Odor 934 147,143 6

Temperature 50,166 202,660 35 20 1 7,680

Total Toxics 7,226 23,556 316 29 12,659 192

Toxic Inorganics 6,834 8,035 6 28,097 5

Toxic Organics 4,886 94,686 925 13 14 133

Trash 238 1,717 31 458

Turbidity 28,126 1,372,857 378 129 22 4,089

National Probable Sources Contributing to Impairments

Description of this table

NOTE: Click on a source of impairment (e.g. agriculture) to see the specific state-reported sources that are

grouped to make up this category.

Probable Source Size of Assessed Waters with Probable Sources of Impairments

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Group

Rivers

and

Streams

(Miles)

Lakes,

Reservoirs,

and Ponds

(Acres)

Bays and

Estuaries

(Square

Miles)

Coastal

Shoreline

(Miles)

Ocean

and

Near

Coastal

(Square

Miles)

Wetlands

(Acres)

Great

Lakes

Shoreline

(Miles)

Great

Lakes

Open

Water

(Square

Miles)

Agriculture 123,669 1,821,113 3,028 142 369,637 536 4,373

Aquaculture 318 4,620 0 5

Atmospheric

Deposition 101,015 4,804,255 7,530 388 777 200,741 3,400 53,270

Commercial Harbor

And Port Activities 109,240 470 20 0

Construction 13,522 319,470 16 23 3 13,971

Groundwater

Loadings/Withdrawals 178 98,032 158 3,045

Habitat Alterations

(Not Directly Related

To

Hydromodification)

32,415 360,800 2,057 8,017

Hydromodification 58,915 907,651 2,513 136 4 109,024 7

Industrial 14,200 224,021 3,760 127 4 195,840 31

Land

Application/Waste

Sites

1

Land

Application/Waste

Sites/Tanks

8,277 77,106 52 12 1,634 31

Legacy/Historical

Pollutants 4,889 769,768 1,469 8 427 13,991

Military Bases 42 2,436

Municipal

Discharges/Sewage 50,813 813,637 4,406 326 116 464,479 120

Natural/Wildlife 51,396 1,355,736 4,225 100 1 563,032 0

Other 10,179 867,056 3,630 34 65,874 25

Recreation And

Tourism

(Non-Boating)

1,741 107,766 0 20 4 787

Recreational Boating

And Marinas 132 126,413 1,053 36 9

Resource Extraction 26,264 563,235 1,292 12 94,719

Silviculture (Forestry) 19,444 242,583 0 2

Spills/Dumping 2,420 194,422 26 13 2

Unknown 87,600 3,199,313 5,447 427 560 707,582 141 310

Unspecified Nonpoint

Source 46,985 759,087 2,607 120 7 63,901 8

Urban-Related

Runoff/Stormwater 51,548 858,186 1,877 270 452 2 2 13,867

National Previously Impaired Waters Now Attaining All Uses

Description of this table

NOTE: Click on the underlined "Number of Waters Attaining" value for a

detailed list of those waters now attaining all uses.

Cycle

Attaining Number of Waters Attaining

Number of

Causes of

Impairment

Addressed

2002 23 24

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2003 4 7

2004 159 204

2005 107 234

2006 85 101

2007 233 396

2008

339

420

2009

318

489

2010 302 372

2011 168 201

2012 88 119

Impaired Waters Listed By State

Description of this table

State Name Number of Waters on 303(d) List

Alabama 209

Alaska 35

American Samoa 44

Arizona 79

Arkansas 224

California 691

Colorado 244

Connecticut 425

Delaware 101

District Of Columbia 36

Florida 2,292

Georgia 215

Guam 47

Hawaii 309

Idaho 915

Illinois 1,057

Indiana 1,836

Iowa 474

Kansas 1,387

Kentucky 1,300

Louisiana 250

Maine 114

Maryland 184

Massachusetts 710

Michigan 2,352

Minnesota 1,144

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Mississippi 180

Missouri 245

Montana 604

N. Mariana Islands 24

Nebraska 260

Nevada 181

New Hampshire 1,449

New Jersey 716

New Mexico 196

New York 528

North Carolina 1,270

North Dakota 214

Ohio 267

Oklahoma 723

Oregon 1,397

Pennsylvania 6,957

Puerto Rico 165

Rhode Island 162

South Carolina 961

South Dakota 159

Tennessee 1,028

Texas 719

Utah 118

Vermont 126

Virgin Islands 87

Virginia 1,523

Washington 2,419

West Virginia 1,097

Wisconsin 593

Wyoming 111

Total: 41,153 impaired waters

National Cumulative TMDLs by Pollutant

This chart includes TMDLs since October 1, 1995.

Description of this table

NOTE: Click on the underlined "Pollutant Group" value to see a

detailed list of pollutants. Click on the underlined "Number of

TMDLs" value to see a listing of those TMDLs for the pollutant

Group.

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Pollutant Group Number of TMDLs

Number of

Causes of

Impairment

Addressed

Pathogens

10,572

10,848

Metals (other than

Mercury) 8,589 8,782

Mercury 6,994 7,026

Nutrients 5,273 6,341

Sediment 3,735 4,359

Temperature 2,090 2,099

Organic

Enrichment/Oxygen

Depletion

1,957 2,067

pH/Acidity/Caustic

Conditions 1,826 1,867

Salinity/Total

Dissolved

Solids/Chlorides

/Sulfates

1,571 1,626

Turbidity 1,325 1,544

Pesticides 1,166 1,264

Ammonia 1,090 1,153

Polychlorinated

Biphenyls (PCBs) 485 506

Chlorine 335 341

Other Cause 222 246

Toxic Inorganics 197 197

Toxic Organics 158 199

Cause Unknown -

Impaired Biota 133 137

Total Toxics 103 111

Habitat Alterations 83 84

Trash 72 76

Algal Growth 71 78

Dioxins 27 28

Noxious Aquatic Plants 21 22

Radiation 19 22

Oil and Grease 14 14

Cause Unknown 7 7

Nuisance Exotic

Species

3 6

Fish Consumption

Advisory 2 2

Total: 48,140 TMDLs; 51,052 Causes of Impairment Addressed

Approved TMDLs By State

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This chart includes TMDLs since October 1, 1995.

Description of this table

NOTE: Click on the state name to see a state report. Click on the Number of TMDLs to see a detailed list

of the TMDLs.

State Name Number of TMDLs

Alabama 284

Alaska 53

American Samoa 2

Arizona 84

Arkansas 241

California 1,535

Colorado 992

Connecticut 144

Delaware 576

District Of Columbia 369

Florida 855

Georgia 1,649

Guam 18

Hawaii 64

Idaho 1,913

Illinois 324

Indiana 959

Iowa 180

Kansas 2,892

Kentucky 240

Louisiana 750

Maine 301

Maryland 808

Massachusetts 485

Michigan 193

Minnesota 1,342

Mississippi 1,429

Missouri 288

Montana 950

Nebraska 92

Nevada 64

New Hampshire 6,006

New Jersey 616

New Mexico 302

New York 659

North Carolina 208

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North Dakota 107

Ohio 1,524

Oklahoma 500

Oregon 1,228

Pennsylvania 7,038

Puerto Rico 236

Rhode Island 176

South Carolina 477

South Dakota 313

Tennessee 1,207

Texas 219

Utah 307

Vermont 117

Virgin Islands 66

Virginia 1,358

Washington 1,385

West Virginia 3,463

Wisconsin 199

Wyoming 353

Total: 48,140 TMDLs

National Cumulative Number of TMDLs

EPA Fiscal Year starts October 1 and ends September 30.

Description of this table

NOTE: Click on the underlined "Number of TMDLs Completed"

value for a detailed list of the TMDLs for the fiscal year.

Fiscal

Year Number of TMDLs

Number of

Causes of

Impairment

Addressed

1996 122 123

1997 337 351

1998 402 408

1999 330 373

2000 1,556 1,581

2001 2,581 2,617

2002 2,739 2,822

2003 3,013 3,289

2004 3,383 3,639

2005 4,317 4,636

2006 4,216 4,566

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2007 4,326 4,655

2008

9,248

9,532

2009 4,401 4,627

2010 2,566 2,704

2011 2,820 3,137

2012 1,783 1,992

Total: 48,140 TMDLs; 51,052 Causes of Impairment Addressed

Status of Available Data Used in This Report

Description of this table

State Name Assessed Waters Report Year Impaired Waters Report Year

Alabama 2010 2010

Alaska 2010 2010

American Samoa 2010 2010

Arizona 2008 2008

Arkansas 2008 2008

California 2004 2006

Colorado 2010 2010

Connecticut 2010 2010

Delaware 2006 2006

District Of Columbia 2010 2010

Florida 2010 2010

Georgia 2010 2010

Guam 2010 2010

Hawaii 2006 2006

Idaho 2010 2010

Illinois 2008 2006

Indiana 2010 2008

Iowa 2010 2010

Kansas 2008 2010

Kentucky 2010 2010

Louisiana 2010 2006

Maine 2010 2010

Maryland 2002 2010

Massachusetts 2010 2010

Michigan 2010 2008

Minnesota 2010 2008

Mississippi 2010 2010

Missouri 2010 2010

Montana 2010 2010

N. Mariana Islands 2010 2010

Nebraska 2010 2010

Nevada 2006 2006

New Hampshire 2010 2010

New Jersey 2010 2010

New Mexico 2010 2010

New York 2010 2010

North Carolina 2010 2010

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North Dakota 2010 2010

Ohio 2010 2008

Oklahoma 2010 2010

Oregon 2006 2006

Pennsylvania 2006 2004

Puerto Rico 2010 2010

Rhode Island 2010 2010

South Carolina 2010 2010

South Dakota 2010 2010

Tennessee 2010 2010

Texas 2010 2010

Utah 2010 2006

Vermont 2008 2010

Virgin Islands 2010 2010

Virginia 2010 2010

Washington 2008 2008

West Virginia 2010 2010

Wisconsin 2006 2006

Wyoming 2010 2010

TMDL Document Search

Full Text Search of TMDL Documents

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