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National Summary of State Information

Map of the United States

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.





Assessed Waters of United States

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

Description of this table
 
    476,351 5,686,264 7,296 963 616 573,947 78 62
    7,559 145,290            
    560,411 12,141,045 26,103 7,234 1,058 538,492 4,353 53,270
1,044,321 17,972,599 33,399 8,197 1,674 1,112,438 4,431 53,332
3,533,205 41,666,049 87,791 58,618 54,120 107,700,000 5,202 60,546
29.6 43.1 38.0 14.0 3.1 1.0 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
11 5 1 2  

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Summary of Water Quality Assessments for Each Waterbody Type


National Summary
Water Quality Attainment in Assessed Rivers and Streams

Description of this table

All
Rivers and Streams

3,533,205.0 Miles of Rivers and Streams

Assessed 1,044,321
Unassessed 2,488,884
Total Miles 3,533,205







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Description of this table

Assessed
Rivers and Streams

1,044,321.0 Miles of
Assessed Rivers and Streams

Good 476,351
Threatened 7,559
Impaired 560,411
Total Miles Assessed 1,044,321

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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
% Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 817,555 56.9 .6 42.5 color.gifcolor.gifcolor.gif
Recreation Recreation 429,197 58.8 1.5 39.7 color.gifcolor.gifcolor.gif
Agricultural Agricultural 351,120 95.5 .1 4.4 color.gifcolor.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 275,341 28.2 .9 70.9 color.gifcolor.gifcolor.gif
Public Water Supply Public Water Supply 200,564 77.8 .2 22.0 color.gifcolor.gifcolor.gif
Industrial Industrial 196,843 97.8 .0 2.2 color.gifcolor.gif
Hydropower Generation Other 84,869 97.8 .0 2.2 color.gifcolor.gif
Aesthetic Value Aesthetic Value 28,675 92.8 .0 7.2 color.gifcolor.gif
Exceptional Recreational or Ecological Significance Exceptional Recreational Or Ecological Significance 4,509 80.3 .0 19.7 color.gifcolor.gif

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National Summary
Causes of Impairment in Assessed Rivers and Streams

Description of this table
Pathogens color.gif 166,518
Sediment color.gif 119,412
Nutrients color.gif 106,305
Mercury color.gif 102,802
Organic Enrichment/Oxygen Depletion color.gif 88,106
Polychlorinated Biphenyls (PCBs) color.gif 80,255
Metals (other than Mercury) color.gif 76,209
Temperature color.gif 69,322
Habitat Alterations color.gif 64,089
Flow Alteration(s) color.gif 42,229
Turbidity color.gif 39,483
Cause Unknown - Impaired Biota color.gif 38,635
Cause Unknown color.gif 38,324
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 34,051
pH/Acidity/Caustic Conditions color.gif 28,745
Pesticides color.gif 19,032
Ammonia color.gif 12,143
Other Cause color.gif 12,066
Total Toxics color.gif 10,717
Fish Consumption Advisory color.gif 9,916
Toxic Inorganics color.gif 7,548
Algal Growth color.gif 6,014
Dioxins color.gif 5,046
Toxic Organics color.gif 4,993
Oil and Grease color.gif 3,084
Biotoxins color.gif 2,150
Nuisance Exotic Species color.gif 1,448
Trash color.gif 1,415
Taste, Color and Odor color.gif 854
Chlorine color.gif 754
Cause Unknown - Fish Kills color.gif 678
Radiation color.gif 656
Noxious Aquatic Plants color.gif 354
Nuisance Native Species color.gif 127

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National Summary
Probable Sources of Impairments in Assessed Rivers and Streams

Description of this table
Agriculture color.gif 131,149
Unknown color.gif 103,292
Atmospheric Deposition color.gif 99,930
Hydromodification color.gif 61,088
Urban-Related Runoff/Stormwater color.gif 60,849
Municipal Discharges/Sewage color.gif 58,558
Natural/Wildlife color.gif 51,588
Unspecified Nonpoint Source color.gif 49,007
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 34,990
Resource Extraction color.gif 29,289
Silviculture (Forestry) color.gif 19,381
Industrial color.gif 17,920
Construction color.gif 12,903
Other color.gif 10,176
Land Application/Waste Sites/Tanks color.gif 9,409
Legacy/Historical Pollutants color.gif 5,991
Spills/Dumping color.gif 3,351
Recreation And Tourism (Non-Boating) color.gif 1,808
Aquaculture color.gif 317
Groundwater Loadings/Withdrawals color.gif 270
Recreational Boating And Marinas color.gif 142
Commercial Harbor And Port Activities color.gif 52
Military Bases color.gif 20

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National Summary
Water Quality Attainment in Assessed Lakes, Reservoirs, and Ponds

Description of this table

All
Lakes, Reservoirs, and Ponds

41,666,049.0 Acres of Lakes, Reservoirs, and Ponds

Assessed 17,972,599
Unassessed 23,693,450
Total Acres 41,666,049







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Description of this table

Assessed
Lakes, Reservoirs, and Ponds

17,972,599.1 Acres of
Assessed Lakes, Reservoirs, and Ponds

Good 5,686,264
Threatened 145,290
Impaired 12,141,045
Total Acres Assessed 17,972,599

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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
% Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 10,369,982 59.4 1.2 39.4 color.gifcolor.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 9,968,144 22.7 1.2 76.0 color.gifcolor.gifcolor.gif
Recreation Recreation 8,213,456 85.2 1.6 13.2 color.gifcolor.gifcolor.gif
Public Water Supply Public Water Supply 6,188,711 79.7 1.8 18.5 color.gifcolor.gifcolor.gif
Agricultural Agricultural 4,987,548 96.3 .0 3.7 color.gifcolor.gif
Industrial Industrial 3,317,737 99.9 .0 .1 color.gifcolor.gif
Hydropower Generation Other 2,437,053 87.0 .0 13.0 color.gifcolor.gif
Aesthetic Value Aesthetic Value 1,221,989 51.9 .0 48.1 color.gifcolor.gif
Exceptional Recreational or Ecological Significance Exceptional Recreational Or Ecological Significance 229 84.3 .0 15.7 color.gifcolor.gif

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National Summary
Causes of Impairment in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Mercury color.gif 7,980,929
Nutrients color.gif 3,064,441
Polychlorinated Biphenyls (PCBs) color.gif 2,895,093
Organic Enrichment/Oxygen Depletion color.gif 1,456,322
Turbidity color.gif 1,358,516
Metals (other than Mercury) color.gif 976,615
pH/Acidity/Caustic Conditions color.gif 938,559
Algal Growth color.gif 916,799
Nuisance Exotic Species color.gif 752,707
Sediment color.gif 694,696
Fish Consumption Advisory color.gif 539,504
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 459,331
Habitat Alterations color.gif 319,844
Pathogens color.gif 312,741
Pesticides color.gif 258,988
Temperature color.gif 237,451
Ammonia color.gif 207,612
Other Cause color.gif 196,427
Flow Alteration(s) color.gif 189,938
Taste, Color and Odor color.gif 162,635
Dioxins color.gif 109,289
Nuisance Native Species color.gif 100,137
Noxious Aquatic Plants color.gif 79,641
Cause Unknown - Impaired Biota color.gif 57,780
Cause Unknown color.gif 38,974
Biotoxins color.gif 17,628
Total Toxics color.gif 12,834
Toxic Organics color.gif 10,044
Cause Unknown - Fish Kills color.gif 9,391
Toxic Inorganics color.gif 6,170
Trash color.gif 4,600
Chlorine color.gif 3,208
Oil and Grease color.gif 1,331
Radiation color.gif 48

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

Description of this table
Atmospheric Deposition color.gif 4,720,448
Unknown color.gif 3,086,914
Agriculture color.gif 983,824
Other color.gif 801,082
Legacy/Historical Pollutants color.gif 762,335
Natural/Wildlife color.gif 758,147
Unspecified Nonpoint Source color.gif 672,427
Municipal Discharges/Sewage color.gif 642,787
Urban-Related Runoff/Stormwater color.gif 617,949
Hydromodification color.gif 585,912
Resource Extraction color.gif 427,925
Construction color.gif 246,952
Industrial color.gif 241,431
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 187,594
Spills/Dumping color.gif 177,578
Recreation And Tourism (Non-Boating) color.gif 112,158
Silviculture (Forestry) color.gif 76,425
Land Application/Waste Sites/Tanks color.gif 55,211
Recreational Boating And Marinas color.gif 34,724
Aquaculture color.gif 4,620
Military Bases color.gif 2,639
Groundwater Loadings/Withdrawals color.gif 438

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National Summary
Water Quality Attainment in Assessed Bays and Estuaries

Description of this table

All
Bays and Estuaries

87,790.6 Square Miles of Bays and Estuaries

Assessed 33,399
Unassessed 54,391
Total Square Miles 87,791







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Description of this table

Assessed
Bays and Estuaries

33,399.4 Square Miles of
Assessed Bays and Estuaries

Good 7,296
Threatened 0
Impaired 26,103
Total Square Miles Assessed 33,399

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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
% Good
% Threatened
% Impaired
Aquatic Life Harvesting Aquatic Life Harvesting 24,216 16.5 .0 83.5 color.gifcolor.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 20,307 40.1 .0 59.9 color.gifcolor.gif
Recreation Recreation 14,768 69.6 .0 30.4 color.gifcolor.gif
Agricultural Agricultural 3,788 96.7 .0 3.3 color.gifcolor.gif
Industrial Industrial 3,225 100.0 .0 .0 color.gifcolor.gif
Hydropower Generation Other 3,167 100.0 .0 .0 color.gifcolor.gif
Public Water Supply Public Water Supply 189 90.2 .0 9.8 color.gifcolor.gif
Aesthetic Value Aesthetic Value 67 76.6 .0 23.4 color.gifcolor.gif

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National Summary
Causes of Impairment in Assessed Bays and Estuaries

Description of this table
Mercury color.gif 14,139
Polychlorinated Biphenyls (PCBs) color.gif 7,607
Pathogens color.gif 6,865
Organic Enrichment/Oxygen Depletion color.gif 5,424
Dioxins color.gif 4,351
Other Cause color.gif 3,431
Fish Consumption Advisory color.gif 3,084
Noxious Aquatic Plants color.gif 1,855
Metals (other than Mercury) color.gif 1,845
Pesticides color.gif 1,807
Algal Growth color.gif 1,635
Nutrients color.gif 1,265
Cause Unknown - Impaired Biota color.gif 1,177
Nuisance Exotic Species color.gif 763
Toxic Organics color.gif 718
Trash color.gif 434
Turbidity color.gif 372
Total Toxics color.gif 333
Sediment color.gif 224
Temperature color.gif 165
Oil and Grease color.gif 101
pH/Acidity/Caustic Conditions color.gif 80
Ammonia color.gif 45
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 44
Cause Unknown color.gif 34
Taste, Color and Odor color.gif 7
Toxic Inorganics color.gif 6
Chlorine color.gif 5
Nuisance Native Species color.gif 4
Flow Alteration(s) color.gif 3
Habitat Alterations color.gif 2

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National Summary
Probable Sources of Impairments in Assessed Bays and Estuaries

Description of this table
Atmospheric Deposition color.gif 8,372
Unknown color.gif 5,781
Municipal Discharges/Sewage color.gif 5,540
Other color.gif 4,465
Industrial color.gif 4,316
Natural/Wildlife color.gif 3,523
Urban-Related Runoff/Stormwater color.gif 3,172
Spills/Dumping color.gif 3,162
Unspecified Nonpoint Source color.gif 2,593
Agriculture color.gif 2,583
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 2,201
Hydromodification color.gif 2,065
Legacy/Historical Pollutants color.gif 1,563
Recreational Boating And Marinas color.gif 794
Resource Extraction color.gif 780
Commercial Harbor And Port Activities color.gif 495
Land Application/Waste Sites/Tanks color.gif 84
Recreation And Tourism (Non-Boating) color.gif 10
Construction color.gif 4
Land Application/Waste Sites color.gif 1
Groundwater Loadings/Withdrawals color.gif 0
Aquaculture color.gif 0
Silviculture (Forestry) color.gif 0

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National Summary
Water Quality Attainment in Assessed Coastal Shoreline

Description of this table

All
Coastal Shoreline

58,618.0 Miles of Coastal Shoreline

Assessed 8,197
Unassessed 50,421
Total Miles 58,618







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Description of this table

Assessed
Coastal Shoreline

8,197.1 Miles of
Assessed Coastal Shoreline

Good 963
Threatened 0
Impaired 7,234
Total Miles Assessed 8,197

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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
% Good
% Threatened
% Impaired
Aquatic Life Harvesting Aquatic Life Harvesting 7,101 6.3 .0 93.7 color.gifcolor.gif
Recreation Recreation 1,703 80.7 .0 19.3 color.gifcolor.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 837 45.6 .0 54.4 color.gifcolor.gif
Aesthetic Value Aesthetic Value 235 100.0 .0 .0 color.gif
Industrial Industrial 30 83.3 .0 16.7 color.gifcolor.gif
Hydropower Generation Other 4 .0 .0 100.0 color.gif

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National Summary
Causes of Impairment in Assessed Coastal Shoreline

Description of this table
Mercury color.gif 6,461
Pathogens color.gif 1,024
Organic Enrichment/Oxygen Depletion color.gif 450
Turbidity color.gif 248
pH/Acidity/Caustic Conditions color.gif 138
Nutrients color.gif 131
Algal Growth color.gif 93
Cause Unknown - Impaired Biota color.gif 70
Metals (other than Mercury) color.gif 60
Polychlorinated Biphenyls (PCBs) color.gif 50
Temperature color.gif 50
Pesticides color.gif 36
Ammonia color.gif 30
Oil and Grease color.gif 13
Sediment color.gif 5

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National Summary
Probable Sources of Impairments in Assessed Coastal Shoreline

Description of this table
Unknown color.gif 487
Atmospheric Deposition color.gif 388
Municipal Discharges/Sewage color.gif 349
Urban-Related Runoff/Stormwater color.gif 281
Hydromodification color.gif 143
Unspecified Nonpoint Source color.gif 121
Agriculture color.gif 113
Industrial color.gif 90
Recreational Boating And Marinas color.gif 65
Spills/Dumping color.gif 13
Legacy/Historical Pollutants color.gif 8
Land Application/Waste Sites/Tanks color.gif 7
Aquaculture color.gif 5
Natural/Wildlife color.gif 1
Resource Extraction color.gif 0
Recreation And Tourism (Non-Boating) color.gif 0

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National Summary
Water Quality Attainment in Assessed Ocean and Near Coastal

Description of this table

All
Ocean and Near Coastal

54,120.0 Square Miles of Ocean and Near Coastal

Assessed 1,674
Unassessed 52,446
Total Square Miles 54,120







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Description of this table

Assessed
Ocean and Near Coastal

1,674.4 Square Miles of
Assessed Ocean and Near Coastal

Good 616
Threatened 0
Impaired 1,058
Total Square Miles Assessed 1,674

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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
% Good
% Threatened
% Impaired
Recreation Recreation 1,126 97.2 .0 2.8 color.gifcolor.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 919 40.5 .0 59.5 color.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 888 7.0 .0 93.0 color.gifcolor.gif
Hydropower Generation Other 376 46.7 .0 53.3 color.gifcolor.gif
Agricultural Agricultural 201 100.0 .0 .0 color.gif

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National Summary
Causes of Impairment in Assessed Ocean and Near Coastal

Description of this table
Mercury color.gif 796
Organic Enrichment/Oxygen Depletion color.gif 579
Pesticides color.gif 567
Polychlorinated Biphenyls (PCBs) color.gif 531
Pathogens color.gif 80
Nuisance Exotic Species color.gif 35
Total Toxics color.gif 29
Turbidity color.gif 24
Metals (other than Mercury) color.gif 15
Toxic Organics color.gif 14
Habitat Alterations color.gif 10
Dioxins color.gif 9
pH/Acidity/Caustic Conditions color.gif 7
Nutrients color.gif 7
Temperature color.gif 1
Ammonia color.gif 1

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National Summary
Probable Sources of Impairments in Assessed Ocean and Near Coastal

Description of this table
Atmospheric Deposition color.gif 777
Unknown color.gif 604
Urban-Related Runoff/Stormwater color.gif 453
Municipal Discharges/Sewage color.gif 114
Recreational Boating And Marinas color.gif 8
Hydromodification color.gif 7
Recreation And Tourism (Non-Boating) color.gif 5
Unspecified Nonpoint Source color.gif 4
Construction color.gif 4
Industrial color.gif 4
Spills/Dumping color.gif 2
Natural/Wildlife color.gif 1
Commercial Harbor And Port Activities color.gif 0

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National Summary
Water Quality Attainment in Assessed Wetlands

Description of this table

All
Wetlands

107,700,000.0 Acres of Wetlands

Assessed 1,112,438
Unassessed 106,587,562
Total Acres 107,700,000







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Description of this table

Assessed
Wetlands

1,112,438.3 Acres of
Assessed Wetlands

Good 573,947
Threatened 0
Impaired 538,492
Total Acres Assessed 1,112,438

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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
% Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 1,102,027 57.9 .0 42.1 color.gifcolor.gif
Recreation Recreation 1,044,120 92.9 .0 7.1 color.gifcolor.gif
Public Water Supply Public Water Supply 480,401 100.0 .0 .0 color.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 121,430 .7 .0 99.3 color.gifcolor.gif
Agricultural Agricultural 44,987 37.6 .0 62.4 color.gifcolor.gif
Industrial Industrial 18,194 100.0 .0 .0 color.gif
Hydropower Generation Other 719 100.0 .0 .0 color.gif

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National Summary
Causes of Impairment in Assessed Wetlands

Description of this table
Organic Enrichment/Oxygen Depletion color.gif 396,167
Mercury color.gif 246,160
Pathogens color.gif 72,349
Metals (other than Mercury) color.gif 28,168
Toxic Inorganics color.gif 28,053
Temperature color.gif 14,900
Sediment color.gif 10,786
Algal Growth color.gif 4,631
Flow Alteration(s) color.gif 4,037
Turbidity color.gif 3,915
Nuisance Exotic Species color.gif 2,104
Habitat Alterations color.gif 1,754
Nutrients color.gif 1,720
Cause Unknown - Fish Kills color.gif 1,034
Fish Consumption Advisory color.gif 1,000
Cause Unknown color.gif 1,000
Cause Unknown - Impaired Biota color.gif 973
Noxious Aquatic Plants color.gif 940
pH/Acidity/Caustic Conditions color.gif 838
Polychlorinated Biphenyls (PCBs) color.gif 707
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 299
Trash color.gif 0
Pesticides color.gif 0
Toxic Organics color.gif 0
Ammonia color.gif 0
Total Toxics color.gif 0

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National Summary
Probable Sources of Impairments in Assessed Wetlands

Description of this table
Unknown color.gif 333,053
Agriculture color.gif 201,776
Atmospheric Deposition color.gif 200,741
Industrial color.gif 195,980
Municipal Discharges/Sewage color.gif 72,341
Recreational Boating And Marinas color.gif 72,320
Resource Extraction color.gif 32,215
Natural/Wildlife color.gif 8,332
Hydromodification color.gif 6,870
Unspecified Nonpoint Source color.gif 1,098
Construction color.gif 1,000
Land Application/Waste Sites/Tanks color.gif 680
Other color.gif 237
Urban-Related Runoff/Stormwater color.gif 104

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National Summary
Water Quality Attainment in Assessed Great Lakes Shoreline

Description of this table

All
Great Lakes Shoreline

5,202.2 Miles of Great Lakes Shoreline

Assessed 4,431
Unassessed 772
Total Miles 5,202







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Description of this table

Assessed
Great Lakes Shoreline

4,430.5 Miles of
Assessed Great Lakes Shoreline

Good 78
Threatened 0
Impaired 4,353
Total Miles Assessed 4,431

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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
% Good
% Threatened
% Impaired
Aquatic Life Harvesting Aquatic Life Harvesting 4,064 .0 .0 100.0 color.gif
Agricultural Agricultural 3,131 100.0 .0 .0 color.gif
Industrial Industrial 3,131 100.0 .0 .0 color.gif
Hydropower Generation Other 3,131 100.0 .0 .0 color.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 865 33.1 .0 66.9 color.gifcolor.gif
Recreation Recreation 816 32.2 .0 67.8 color.gifcolor.gif
Public Water Supply Public Water Supply 336 100.0 .0 .0 color.gif

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National Summary
Causes of Impairment in Assessed Great Lakes Shoreline

Description of this table
Polychlorinated Biphenyls (PCBs) color.gif 4,064
Dioxins color.gif 3,471
Pesticides color.gif 2,483
Mercury color.gif 2,194
Pathogens color.gif 621
Nutrients color.gif 380
Sediment color.gif 319
Nuisance Exotic Species color.gif 307
Fish Consumption Advisory color.gif 285
Flow Alteration(s) color.gif 202
Algal Growth color.gif 191
Habitat Alterations color.gif 170
Organic Enrichment/Oxygen Depletion color.gif 138
Other Cause color.gif 19
Toxic Inorganics color.gif 5
Trash color.gif 3

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National Summary
Probable Sources of Impairments in Assessed Great Lakes Shoreline

Description of this table
Atmospheric Deposition color.gif 3,411
Legacy/Historical Pollutants color.gif 867
Agriculture color.gif 620
Municipal Discharges/Sewage color.gif 305
Hydromodification color.gif 231
Unknown color.gif 144
Urban-Related Runoff/Stormwater color.gif 99
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 90
Industrial color.gif 72
Construction color.gif 18
Spills/Dumping color.gif 18
Land Application/Waste Sites/Tanks color.gif 11
Unspecified Nonpoint Source color.gif 6
Natural/Wildlife color.gif 0

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National Summary
Water Quality Attainment in Assessed Great Lakes Open Water

Description of this table

All
Great Lakes Open Water

60,546.0 Square Miles of Great Lakes Open Water

Assessed 53,332
Unassessed 7,214
Total Square Miles 60,546







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Description of this table

Assessed
Great Lakes Open Water

53,331.6 Square Miles of
Assessed Great Lakes Open Water

Good 62
Threatened 0
Impaired 53,270
Total Square Miles Assessed 53,332

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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
% Good
% Threatened
% Impaired
Aquatic Life Harvesting Aquatic Life Harvesting 39,184 .0 .0 100.0 color.gif
Industrial Industrial 39,031 100.0 .0 .0 color.gif
Agricultural Agricultural 39,031 100.0 .0 .0 color.gif
Hydropower Generation Other 39,031 100.0 .0 .0 color.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 14,300 1.5 .0 98.5 color.gifcolor.gif
Recreation Recreation 151 100.0 .0 .0 color.gif
Public Water Supply Public Water Supply 151 100.0 .0 .0 color.gif

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National Summary
Causes of Impairment in Assessed Great Lakes Open Water

Description of this table
Polychlorinated Biphenyls (PCBs) color.gif 39,183
Dioxins color.gif 38,862
Mercury color.gif 29,968
Pesticides color.gif 29,661
Fish Consumption Advisory color.gif 14,087
Organic Enrichment/Oxygen Depletion color.gif 13,867
Total Toxics color.gif 192
Nuisance Exotic Species color.gif 25

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National Summary
Probable Sources of Impairments in Assessed Great Lakes Open Water

Description of this table
Atmospheric Deposition color.gif 53,270
Legacy/Historical Pollutants color.gif 13,991
Urban-Related Runoff/Stormwater color.gif 13,867
Agriculture color.gif 4,373
Unknown color.gif 310
Other color.gif 25

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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. See also Pollution categories summary document (PDF) (20 pp, 557K, About PDF) for brief, non-technical descriptions of general cause categories.
Size of Assessed Waters with Listed Causes of Impairment
Algal Growth 6,014 916,799 1,635 93 0 4,631 191  
Ammonia 12,143 207,612 45 30 1 0    
Biotoxins 2,150 17,628            
Cause Unknown 38,324 38,974 34     1,000    
Cause Unknown - Fish Kills 678 9,391       1,034    
Cause Unknown - Impaired Biota 38,635 57,780 1,177 70   973    
Chlorine 754 3,208 5          
Dioxins 5,046 109,289 4,351   9   3,471 38,862
Fish Consumption Advisory 9,916 539,504 3,084     1,000 285 14,087
Flow Alteration(s) 42,229 189,938 3     4,037 202  
Habitat Alterations 64,089 319,844 2   10 1,754 170  
Mercury 102,802 7,980,929 14,139 6,461 796 246,160 2,194 29,968
Metals (other than Mercury) 76,209 976,615 1,845 60 15 28,168    
Noxious Aquatic Plants 354 79,641 1,855     940    
Nuisance Exotic Species 1,448 752,707 763   35 2,104 307 25
Nuisance Native Species 127 100,137 4          
Nutrients 106,305 3,064,441 1,265 131 7 1,720 380  
Oil and Grease 3,084 1,331 101 13        
Organic Enrichment/Oxygen Depletion 88,106 1,456,322 5,424 450 579 396,167 138 13,867
Other Cause 12,066 196,427 3,431       19  
Pathogens 166,518 312,741 6,865 1,024 80 72,349 621  
Pesticides 19,032 258,988 1,807 36 567 0 2,483 29,661
pH/Acidity/Caustic Conditions 28,745 938,559 80 138 7 838    
Polychlorinated Biphenyls (PCBs) 80,255 2,895,093 7,607 50 531 707 4,064 39,183
Radiation 656 48            
Salinity/Total Dissolved Solids/Chlorides/Sulfates 34,051 459,331 44     299    
Sediment 119,412 694,696 224 5   10,786 319  
Taste, Color and Odor 854 162,635 7          
Temperature 69,322 237,451 165 50 1 14,900    
Total Toxics 10,717 12,834 333   29 0   192
Toxic Inorganics 7,548 6,170 6     28,053 5  
Toxic Organics 4,993 10,044 718   14 0    
Trash 1,415 4,600 434     0 3  
Turbidity 39,483 1,358,516 372 248 24 3,915    

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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.
Size of Assessed Waters with Probable Sources of Impairments
Agriculture 131,149 983,824 2,583 113   201,776 620 4,373
Aquaculture 317 4,620 0 5        
Atmospheric Deposition 99,930 4,720,448 8,372 388 777 200,741 3,411 53,270
Commercial Harbor And Port Activities 52   495   0      
Construction 12,903 246,952 4   4 1,000 18  
Groundwater Loadings/Withdrawals 270 438 0          
Habitat Alterations (Not Directly Related To Hydromodification) 34,990 187,594 2,201       90  
Hydromodification 61,088 585,912 2,065 143 7 6,870 231  
Industrial 17,920 241,431 4,316 90 4 195,980 72  
Land Application/Waste Sites     1          
Land Application/Waste Sites/Tanks 9,409 55,211 84 7   680 11  
Legacy/Historical Pollutants 5,991 762,335 1,563 8     867 13,991
Military Bases 20 2,639            
Municipal Discharges/Sewage 58,558 642,787 5,540 349 114 72,341 305  
Natural/Wildlife 51,588 758,147 3,523 1 1 8,332 0  
Other 10,176 801,082 4,465     237   25
Recreation And Tourism (Non-Boating) 1,808 112,158 10 0 5      
Recreational Boating And Marinas 142 34,724 794 65 8 72,320    
Resource Extraction 29,289 427,925 780 0   32,215    
Silviculture (Forestry) 19,381 76,425 0          
Spills/Dumping 3,351 177,578 3,162 13 2   18  
Unknown 103,292 3,086,914 5,781 487 604 333,053 144 310
Unspecified Nonpoint Source 49,007 672,427 2,593 121 4 1,098 6  
Urban-Related Runoff/Stormwater 60,849 617,949 3,172 281 453 104 99 13,867

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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.
2002 color.gif 25 26
2003 color.gif 4 7
2004 color.gif 159 207
2005 color.gif 107 238
2006 color.gif 85 101
2007 color.gif 245 458
2008 color.gif 344 431
2009 color.gif 318 541
2010 color.gif 350 452
2011 color.gif 254 309
2012 color.gif 270 413
2013 color.gif 292 347
2014 color.gif 165 280
2015 color.gif 20 23

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Impaired Waters Listed By State

Description of this table
Alabama color.gif 283
Alaska color.gif 35
American Samoa color.gif 45
Arizona color.gif 90
Arkansas color.gif 225
California color.gif 1,021
Colorado color.gif 244
Connecticut color.gif 461
Delaware color.gif 101
District Of Columbia color.gif 36
Florida color.gif 2,292
Georgia color.gif 242
Guam color.gif 47
Hawaii color.gif 352
Idaho color.gif 741
Illinois color.gif 1,057
Indiana color.gif 1,836
Iowa color.gif 480
Kansas color.gif 1,372
Kentucky color.gif 1,433
Louisiana color.gif 236
Maine color.gif 114
Maryland color.gif 184
Massachusetts color.gif 720
Michigan color.gif 2,352
Minnesota color.gif 1,144
Mississippi color.gif 229
Missouri color.gif 270
Montana color.gif 480
N. Mariana Islands color.gif 24
Nebraska color.gif 342
Nevada color.gif 210
New Hampshire color.gif 1,449
New Jersey color.gif 716
New Mexico color.gif 237
New York color.gif 1,543
North Carolina color.gif 1,130
North Dakota color.gif 201
Ohio color.gif 267
Oklahoma color.gif 657
Oregon color.gif 1,397
Pennsylvania color.gif 6,957
Puerto Rico color.gif 231
Rhode Island color.gif 120
South Carolina color.gif 907
South Dakota color.gif 166
Tennessee color.gif 1,012
Texas color.gif 719
Utah color.gif 156
Vermont color.gif 104
Virgin Islands color.gif 87
Virginia color.gif 1,523
Washington color.gif 2,420
West Virginia color.gif 1,097
Wisconsin color.gif 593
Wyoming color.gif 107

Total: 42,494 impaired waters


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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.
Number of Causes of
Impairment Addressed
Mercury color.gif 21,545 21,575
Pathogens color.gif 12,935 13,237
Metals (other than Mercury) color.gif 9,828 10,022
Nutrients color.gif 5,958 7,183
Sediment color.gif 3,922 4,573
Temperature color.gif 2,303 2,313
Organic Enrichment/Oxygen Depletion color.gif 2,141 2,265
pH/Acidity/Caustic Conditions color.gif 1,945 2,004
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 1,707 1,765
Turbidity color.gif 1,585 1,810
Pesticides color.gif 1,218 1,318
Ammonia color.gif 1,114 1,178
Polychlorinated Biphenyls (PCBs) color.gif 497 516
Chlorine color.gif 335 341
Other Cause color.gif 268 323
Toxic Inorganics color.gif 205 205
Toxic Organics color.gif 158 199
Cause Unknown - Impaired Biota color.gif 128 132
Total Toxics color.gif 110 120
Algal Growth color.gif 90 98
Habitat Alterations color.gif 83 84
Trash color.gif 74 74
Dioxins color.gif 27 28
Noxious Aquatic Plants color.gif 21 22
Radiation color.gif 19 22
Oil and Grease color.gif 14 14
Cause Unknown color.gif 7 7
Nuisance Exotic Species color.gif 3 6
Fish Consumption Advisory color.gif 2 2

Total: 68,242 TMDLs; 71,436 Causes of Impairment Addressed

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Approved TMDLs By State

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.
Alabama color.gif 303
Alaska color.gif 58
American Samoa color.gif 2
Arizona color.gif 88
Arkansas color.gif 318
California color.gif 1,811
Colorado color.gif 1,005
Connecticut color.gif 407
Delaware color.gif 579
District Of Columbia color.gif 379
Florida color.gif 2,246
Georgia color.gif 1,700
Guam color.gif 18
Hawaii color.gif 65
Idaho color.gif 2,162
Illinois color.gif 429
Indiana color.gif 1,214
Iowa color.gif 205
Kansas color.gif 3,250
Kentucky color.gif 329
Louisiana color.gif 750
Maine color.gif 341
Maryland color.gif 827
Massachusetts color.gif 594
Michigan color.gif 238
Minnesota color.gif 1,674
Mississippi color.gif 1,440
Missouri color.gif 288
Montana color.gif 1,443
Nebraska color.gif 143
Nevada color.gif 67
New Hampshire color.gif 6,052
New Jersey color.gif 616
New Mexico color.gif 334
New York color.gif 717
North Carolina color.gif 13,443
North Dakota color.gif 136
Ohio color.gif 1,761
Oklahoma color.gif 704
Oregon color.gif 1,241
Pennsylvania color.gif 7,152
Puerto Rico color.gif 321
Rhode Island color.gif 217
South Carolina color.gif 521
South Dakota color.gif 329
Tennessee color.gif 1,259
Texas color.gif 257
Utah color.gif 319
Vermont color.gif 119
Virgin Islands color.gif 66
Virginia color.gif 1,478
Washington color.gif 1,486
West Virginia color.gif 4,700
Wisconsin color.gif 247
Wyoming color.gif 394

Total: 68,242 TMDLs


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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.
1996 color.gif 135 136
1997 color.gif 337 351
1998 color.gif 402 408
1999 color.gif 330 373
2000 color.gif 1,555 1,580
2001 color.gif 2,580 2,616
2002 color.gif 2,743 2,823
2003 color.gif 2,999 3,272
2004 color.gif 3,391 3,649
2005 color.gif 4,319 4,634
2006 color.gif 4,204 4,555
2007 color.gif 4,321 4,651
2008 color.gif 9,264 9,546
2009 color.gif 4,399 4,623
2010 color.gif 2,572 2,708
2011 color.gif 2,830 3,113
2012 color.gif 2,883 3,151
2013 color.gif 15,534 15,624
2014 color.gif 3,305 3,465
2015 color.gif 139 158

Total: 68,242 TMDLs; 71,436 Causes of Impairment Addressed

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Status of Available Data Used in This Report

Description of this table
Alabama 2012 2012
Alaska 2010 2010
American Samoa 2014 2014
Arizona 2010 2010
Arkansas 2008 2008
California 2010 2010
Colorado 2010 2010
Connecticut 2012 2012
Delaware 2006 2006
District Of Columbia 2012 2012
Florida 2010 2010
Georgia 2012 2012
Guam 2010 2010
Hawaii 2014 2014
Idaho 2012 2012
Illinois 2010 2006
Indiana 2010 2008
Iowa 2012 2012
Kansas 2014 2014
Kentucky 2012 2012
Louisiana 2012 2012
Maine 2010 2010
Maryland 2002 2010
Massachusetts 2012 2012
Michigan 2010 2008
Minnesota 2010 2008
Mississippi 2012 2012
Missouri 2014 2014
Montana 2014 2014
N. Mariana Islands 2010 2010
Nebraska 2014 2014
Nevada 2012 2012
New Hampshire 2010 2010
New Jersey 2010 2010
New Mexico 2014 2014
New York 2012 2012
North Carolina 2012 2012
North Dakota 2012 2012
Ohio 2010 2008
Oklahoma 2012 2012
Oregon 2006 2006
Pennsylvania 2006 2004
Puerto Rico 2012 2012
Rhode Island 2012 2012
South Carolina 2012 2012
South Dakota 2014 2014
Tennessee 2012 2012
Texas 2010 2010
Utah 2010 2010
Vermont 2012 2012
Virgin Islands 2012 2012
Virginia 2010 2010
Washington 2008 2008
West Virginia 2010 2010
Wisconsin 2006 2006
Wyoming 2012 2012


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