National Summary of State Information

Map of the United States Alabama Alaska American Samoa Arizona Arkansas California Colorado Connecticut Delaware Washington, DC Florida Georgia Guam Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachussets Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Northern Mariana Islands Ohio Oklahoma Oregon Pennsylvania Puerto Rico Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virgin Islands Virginia Washington West Virginia Wisconsin Wyoming

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
 
    487,299 5,470,004 7,611 911 616 574,907 78 62
    5,550 34,621            
    614,153 13,009,273 27,483 7,275 1,058 657,653 4,353 53,270
1,107,002 18,513,899 35,094 8,187 1,674 1,232,559 4,431 53,332
3,533,205 41,666,049 87,791 58,618 54,120 107,700,000 5,202 60,546
31.3 44.4 40.0 14.0 3.1 1.1 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
12 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 1,107,002
Unassessed 2,426,203
Total Miles 3,533,205







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Description of this table

Assessed
Rivers and Streams

1,107,002.3 Miles of
Assessed Rivers and Streams

Good 487,299
Threatened 5,550
Impaired 614,153
Total Miles Assessed 1,107,002

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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 877,838 54.4 .3 45.3 color.gifcolor.gifcolor.gif
Recreation Recreation 474,153 59.0 .9 40.1 color.gifcolor.gifcolor.gif
Agricultural Agricultural 387,709 95.7 .1 4.3 color.gifcolor.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 327,616 38.3 .1 61.6 color.gifcolor.gifcolor.gif
Public Water Supply Public Water Supply 272,135 76.1 .1 23.9 color.gifcolor.gifcolor.gif
Industrial Industrial 198,273 97.8 .0 2.2 color.gifcolor.gif
Hydropower Generation Other 85,957 97.9 .0 2.1 color.gifcolor.gif
Aesthetic Value Aesthetic Value 30,084 92.8 .0 7.2 color.gifcolor.gif
Exceptional Recreational or Ecological Significance Exceptional Recreational Or Ecological Significance 5,192 82.6 .0 17.4 color.gifcolor.gif

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National Summary
Causes of Impairment in Assessed Rivers and Streams

Description of this table
Pathogens color.gif 176,679
Sediment color.gif 141,093
Nutrients color.gif 112,806
Mercury color.gif 104,539
Organic Enrichment/Oxygen Depletion color.gif 99,549
Temperature color.gif 93,429
Metals (other than Mercury) color.gif 90,377
Polychlorinated Biphenyls (PCBs) color.gif 80,612
Habitat Alterations color.gif 66,474
Turbidity color.gif 47,948
Cause Unknown color.gif 47,100
Flow Alteration(s) color.gif 41,806
Cause Unknown - Impaired Biota color.gif 41,167
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 37,617
pH/Acidity/Caustic Conditions color.gif 32,643
Pesticides color.gif 18,770
Ammonia color.gif 11,680
Total Toxics color.gif 10,567
Other Cause color.gif 10,304
Fish Consumption Advisory color.gif 9,916
Toxic Inorganics color.gif 7,839
Biotoxins color.gif 6,474
Algal Growth color.gif 5,925
Dioxins color.gif 4,812
Toxic Organics color.gif 4,540
Oil and Grease color.gif 2,739
Nuisance Exotic Species color.gif 1,421
Trash color.gif 1,127
Radiation color.gif 693
Chlorine color.gif 647
Taste, Color and Odor color.gif 640
Noxious Aquatic Plants color.gif 335
Cause Unknown - Fish Kills color.gif 172
Nuisance Native Species color.gif 69

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National Summary
Probable Sources of Impairments in Assessed Rivers and Streams

Description of this table
Agriculture color.gif 145,799
Unknown color.gif 139,491
Atmospheric Deposition color.gif 99,845
Hydromodification color.gif 90,750
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 66,016
Urban-Related Runoff/Stormwater color.gif 61,584
Municipal Discharges/Sewage color.gif 59,284
Unspecified Nonpoint Source color.gif 54,009
Natural/Wildlife color.gif 50,203
Silviculture (Forestry) color.gif 40,637
Resource Extraction color.gif 33,921
Construction color.gif 21,312
Industrial color.gif 13,918
Land Application/Waste Sites/Tanks color.gif 8,482
Other color.gif 7,579
Legacy/Historical Pollutants color.gif 6,229
Spills/Dumping color.gif 4,375
Recreation And Tourism (Non-Boating) color.gif 1,598
Aquaculture color.gif 214
Groundwater Loadings/Withdrawals color.gif 199
Recreational Boating And Marinas color.gif 138
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 18,513,899
Unassessed 23,152,150
Total Acres 41,666,049







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Description of this table

Assessed
Lakes, Reservoirs, and Ponds

18,513,898.9 Acres of
Assessed Lakes, Reservoirs, and Ponds

Good 5,470,004
Threatened 34,621
Impaired 13,009,273
Total Acres Assessed 18,513,899

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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 11,131,890 53.8 .1 46.0 color.gifcolor.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 10,160,449 23.8 .1 76.0 color.gifcolor.gifcolor.gif
Recreation Recreation 8,431,970 80.5 .2 19.2 color.gifcolor.gifcolor.gif
Public Water Supply Public Water Supply 6,257,426 75.9 .0 24.1 color.gifcolor.gif
Agricultural Agricultural 5,510,288 97.4 .0 2.6 color.gifcolor.gif
Industrial Industrial 3,251,743 99.9 .0 .1 color.gifcolor.gif
Hydropower Generation Other 2,474,382 87.2 .0 12.8 color.gifcolor.gif
Aesthetic Value Aesthetic Value 1,212,707 62.4 .0 37.6 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 8,202,623
Nutrients color.gif 3,557,781
Polychlorinated Biphenyls (PCBs) color.gif 2,984,109
Organic Enrichment/Oxygen Depletion color.gif 1,697,058
Turbidity color.gif 1,342,740
Metals (other than Mercury) color.gif 1,291,320
pH/Acidity/Caustic Conditions color.gif 987,635
Algal Growth color.gif 893,387
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 829,617
Sediment color.gif 730,281
Nuisance Exotic Species color.gif 680,360
Fish Consumption Advisory color.gif 539,504
Pesticides color.gif 476,203
Pathogens color.gif 425,075
Habitat Alterations color.gif 289,130
Total Toxics color.gif 248,280
Temperature color.gif 244,860
Ammonia color.gif 214,629
Flow Alteration(s) color.gif 184,408
Dioxins color.gif 106,823
Noxious Aquatic Plants color.gif 55,567
Other Cause color.gif 54,879
Cause Unknown - Impaired Biota color.gif 52,778
Oil and Grease color.gif 44,285
Cause Unknown color.gif 42,898
Nuisance Native Species color.gif 26,831
Taste, Color and Odor color.gif 26,506
Toxic Organics color.gif 26,497
Biotoxins color.gif 19,633
Toxic Inorganics color.gif 6,152
Cause Unknown - Fish Kills color.gif 4,808
Trash color.gif 2,109
Chlorine color.gif 50
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 4,844,707
Unknown color.gif 3,727,464
Agriculture color.gif 1,112,022
Natural/Wildlife color.gif 953,091
Unspecified Nonpoint Source color.gif 827,369
Legacy/Historical Pollutants color.gif 755,777
Other color.gif 739,201
Hydromodification color.gif 735,200
Urban-Related Runoff/Stormwater color.gif 642,256
Municipal Discharges/Sewage color.gif 542,672
Resource Extraction color.gif 520,611
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 285,327
Industrial color.gif 228,861
Construction color.gif 219,987
Recreation And Tourism (Non-Boating) color.gif 177,431
Spills/Dumping color.gif 176,323
Silviculture (Forestry) color.gif 159,920
Recreational Boating And Marinas color.gif 28,215
Land Application/Waste Sites/Tanks color.gif 17,010
Groundwater Loadings/Withdrawals color.gif 2,950
Military Bases color.gif 2,639
Aquaculture color.gif 130

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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 35,094
Unassessed 52,697
Total Square Miles 87,791







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Description of this table

Assessed
Bays and Estuaries

35,093.5 Square Miles of
Assessed Bays and Estuaries

Good 7,611
Threatened 0
Impaired 27,483
Total Square Miles Assessed 35,094

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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 25,460 14.9 .0 85.1 color.gifcolor.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 21,701 38.9 .0 61.1 color.gifcolor.gif
Recreation Recreation 15,169 68.6 .0 31.4 color.gifcolor.gif
Agricultural Agricultural 3,789 96.6 .0 3.4 color.gifcolor.gif
Industrial Industrial 3,223 100.0 .0 .0 color.gifcolor.gif
Hydropower Generation Other 3,142 100.0 .0 .0 color.gifcolor.gif
Public Water Supply Public Water Supply 1,735 45.3 .0 54.7 color.gifcolor.gif
Aesthetic Value Aesthetic Value 72 71.5 .0 28.5 color.gifcolor.gif

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National Summary
Causes of Impairment in Assessed Bays and Estuaries

Description of this table
Mercury color.gif 14,143
Polychlorinated Biphenyls (PCBs) color.gif 8,273
Pathogens color.gif 6,574
Organic Enrichment/Oxygen Depletion color.gif 4,989
Dioxins color.gif 4,351
Other Cause color.gif 3,443
Nutrients color.gif 3,111
Fish Consumption Advisory color.gif 3,084
Pesticides color.gif 1,856
Cause Unknown color.gif 1,827
Metals (other than Mercury) color.gif 1,693
Noxious Aquatic Plants color.gif 1,668
Algal Growth color.gif 1,431
Turbidity color.gif 899
Nuisance Exotic Species color.gif 656
Cause Unknown - Impaired Biota color.gif 344
Total Toxics color.gif 336
Trash color.gif 264
Sediment color.gif 223
Toxic Organics color.gif 80
pH/Acidity/Caustic Conditions color.gif 73
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 44
Ammonia color.gif 25
Temperature color.gif 19
Oil and Grease color.gif 16
Toxic Inorganics color.gif 6
Taste, Color and Odor color.gif 6
Habitat Alterations color.gif 2
Flow Alteration(s) color.gif 1

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National Summary
Probable Sources of Impairments in Assessed Bays and Estuaries

Description of this table
Unknown color.gif 8,970
Atmospheric Deposition color.gif 7,924
Municipal Discharges/Sewage color.gif 4,979
Other color.gif 4,471
Industrial color.gif 4,070
Unspecified Nonpoint Source color.gif 3,363
Natural/Wildlife color.gif 3,167
Agriculture color.gif 3,060
Urban-Related Runoff/Stormwater color.gif 2,981
Spills/Dumping color.gif 2,926
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 2,226
Legacy/Historical Pollutants color.gif 1,867
Hydromodification color.gif 1,595
Recreational Boating And Marinas color.gif 520
Resource Extraction color.gif 320
Land Application/Waste Sites/Tanks color.gif 63
Recreation And Tourism (Non-Boating) color.gif 7
Land Application/Waste Sites color.gif 1
Construction color.gif 1
Commercial Harbor And Port Activities color.gif 0
Aquaculture color.gif 0
Silviculture (Forestry) color.gif 0
Groundwater Loadings/Withdrawals 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 8,187
Unassessed 50,431
Total Miles 58,618







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Description of this table

Assessed
Coastal Shoreline

8,186.5 Miles of
Assessed Coastal Shoreline

Good 911
Threatened 0
Impaired 7,275
Total Miles Assessed 8,187

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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 7,275 8.1 .0 91.9 color.gifcolor.gif
Recreation Recreation 1,720 77.0 .0 23.0 color.gifcolor.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 916 45.6 .0 54.4 color.gifcolor.gif
Aesthetic Value Aesthetic Value 235 100.0 .0 .0 color.gif
Public Water Supply Public Water Supply 118 91.4 .0 8.6 color.gifcolor.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 1,056
Organic Enrichment/Oxygen Depletion color.gif 437
Turbidity color.gif 331
pH/Acidity/Caustic Conditions color.gif 143
Nutrients color.gif 131
Temperature color.gif 96
Oil and Grease color.gif 95
Algal Growth color.gif 93
Cause Unknown - Impaired Biota color.gif 74
Metals (other than Mercury) color.gif 60
Polychlorinated Biphenyls (PCBs) color.gif 50
Pesticides color.gif 36
Ammonia color.gif 22
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 542
Atmospheric Deposition color.gif 388
Municipal Discharges/Sewage color.gif 370
Urban-Related Runoff/Stormwater color.gif 268
Hydromodification color.gif 140
Agriculture color.gif 113
Recreational Boating And Marinas color.gif 106
Unspecified Nonpoint Source color.gif 103
Industrial color.gif 94
Spills/Dumping color.gif 13
Legacy/Historical Pollutants color.gif 8
Aquaculture color.gif 5
Construction color.gif 4
Land Application/Waste Sites/Tanks color.gif 4
Natural/Wildlife color.gif 1
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
Organic Enrichment/Oxygen Depletion color.gif 579
Polychlorinated Biphenyls (PCBs) color.gif 531
Mercury color.gif 281
Pathogens color.gif 80
Pesticides color.gif 52
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
Urban-Related Runoff/Stormwater color.gif 379
Atmospheric Deposition color.gif 269
Unknown color.gif 116
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 1,232,559
Unassessed 106,467,441
Total Acres 107,700,000







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Description of this table

Assessed
Wetlands

1,232,559.4 Acres of
Assessed Wetlands

Good 574,907
Threatened 0
Impaired 657,653
Total Acres Assessed 1,232,559

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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 1,221,435 52.3 .0 47.7 color.gifcolor.gif
Recreation Recreation 1,045,364 92.9 .0 7.1 color.gifcolor.gif
Public Water Supply Public Water Supply 480,668 100.0 .0 .0 color.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 121,310 .3 .0 99.7 color.gifcolor.gif
Agricultural Agricultural 53,605 32.8 .0 67.2 color.gifcolor.gif
Industrial Industrial 18,460 100.0 .0 .0 color.gif
Hydropower Generation Other 985 100.0 .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 462,542
Mercury color.gif 315,437
Metals (other than Mercury) color.gif 94,630
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 74,484
Pathogens color.gif 72,385
Nutrients color.gif 67,849
Toxic Inorganics color.gif 28,053
Temperature color.gif 14,900
Turbidity color.gif 5,551
Algal Growth color.gif 4,271
Flow Alteration(s) color.gif 3,086
Nuisance Exotic Species color.gif 2,142
Habitat Alterations color.gif 2,104
Cause Unknown - Impaired Biota color.gif 1,214
Fish Consumption Advisory color.gif 1,000
Cause Unknown color.gif 1,000
Polychlorinated Biphenyls (PCBs) color.gif 933
pH/Acidity/Caustic Conditions color.gif 869
Trash color.gif 320
Toxic Organics color.gif 256
Sediment color.gif 237
Dioxins color.gif 212
Ammonia color.gif 171
Pesticides color.gif 169
Total Toxics color.gif 13

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National Summary
Probable Sources of Impairments in Assessed Wetlands

Description of this table
Unknown color.gif 455,416
Agriculture color.gif 203,038
Atmospheric Deposition color.gif 200,741
Industrial color.gif 196,192
Municipal Discharges/Sewage color.gif 72,341
Recreational Boating And Marinas color.gif 72,320
Resource Extraction color.gif 32,112
Natural/Wildlife color.gif 9,378
Hydromodification color.gif 5,416
Unspecified Nonpoint Source color.gif 1,324
Construction color.gif 1,000
Land Application/Waste Sites/Tanks color.gif 680
Other color.gif 237
Legacy/Historical Pollutants color.gif 212
Urban-Related Runoff/Stormwater color.gif 54
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 33
Spills/Dumping color.gif 6

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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
Industrial Industrial 3,131 100.0 .0 .0 color.gif
Agricultural Agricultural 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 1,237 5.4 .0 94.6 color.gifcolor.gif
Recreation Recreation 1,088 10.4 .0 89.6 color.gifcolor.gif
Public Water Supply Public Water Supply 916 35.4 .0 64.6 color.gifcolor.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 518
Nuisance Exotic Species color.gif 380
Nutrients color.gif 380
Sediment color.gif 290
Fish Consumption Advisory color.gif 285
Habitat Alterations color.gif 170
Organic Enrichment/Oxygen Depletion color.gif 120
Toxic Inorganics color.gif 5

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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 98
Industrial color.gif 72
Land Application/Waste Sites/Tanks color.gif 11
Unspecified Nonpoint Source color.gif 6
Spills/Dumping color.gif 3
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
Agricultural Agricultural 39,031 100.0 .0 .0 color.gif
Hydropower Generation Other 39,031 100.0 .0 .0 color.gif
Industrial Industrial 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
Public Water Supply Public Water Supply 151 100.0 .0 .0 color.gif
Recreation Recreation 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, 557 K, About PDF) for brief, non-technical descriptions of general cause categories.
Size of Assessed Waters with Listed Causes of Impairment
Algal Growth 5,925 893,387 1,431 93 0 4,271    
Ammonia 11,680 214,629 25 22 1 171    
Biotoxins 6,474 19,633            
Cause Unknown 47,100 42,898 1,827     1,000    
Cause Unknown - Fish Kills 172 4,808            
Cause Unknown - Impaired Biota 41,167 52,778 344 74   1,214    
Chlorine 647 50            
Dioxins 4,812 106,823 4,351   9 212 3,471 38,862
Fish Consumption Advisory 9,916 539,504 3,084     1,000 285 14,087
Flow Alteration(s) 41,806 184,408 1     3,086    
Habitat Alterations 66,474 289,130 2   10 2,104 170  
Mercury 104,539 8,202,623 14,143 6,461 281 315,437 2,194 29,968
Metals (other than Mercury) 90,377 1,291,320 1,693 60 15 94,630    
Noxious Aquatic Plants 335 55,567 1,668          
Nuisance Exotic Species 1,421 680,360 656   35 2,142 380 25
Nuisance Native Species 69 26,831            
Nutrients 112,806 3,557,781 3,111 131 7 67,849 380  
Oil and Grease 2,739 44,285 16 95        
Organic Enrichment/Oxygen Depletion 99,549 1,697,058 4,989 437 579 462,542 120 13,867
Other Cause 10,304 54,879 3,443          
Pathogens 176,679 425,075 6,574 1,056 80 72,385 518  
Pesticides 18,770 476,203 1,856 36 52 169 2,483 29,661
pH/Acidity/Caustic Conditions 32,643 987,635 73 143 7 869    
Polychlorinated Biphenyls (PCBs) 80,612 2,984,109 8,273 50 531 933 4,064 39,183
Radiation 693 48            
Salinity/Total Dissolved Solids/Chlorides/Sulfates 37,617 829,617 44     74,484    
Sediment 141,093 730,281 223 5   237 290  
Taste, Color and Odor 640 26,506 6          
Temperature 93,429 244,860 19 96 1 14,900    
Total Toxics 10,567 248,280 336   29 13   192
Toxic Inorganics 7,839 6,152 6     28,053 5  
Toxic Organics 4,540 26,497 80   14 256    
Trash 1,127 2,109 264     320    
Turbidity 47,948 1,342,740 899 331 24 5,551    

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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 145,799 1,112,022 3,060 113   203,038 620 4,373
Aquaculture 214 130 0 5        
Atmospheric Deposition 99,845 4,844,707 7,924 388 269 200,741 3,411 53,270
Commercial Harbor And Port Activities     0   0      
Construction 21,312 219,987 1 4 4 1,000    
Groundwater Loadings/Withdrawals 199 2,950 0          
Habitat Alterations (Not Directly Related To Hydromodification) 66,016 285,327 2,226     33 98  
Hydromodification 90,750 735,200 1,595 140 7 5,416 231  
Industrial 13,918 228,861 4,070 94 4 196,192 72  
Land Application/Waste Sites     1          
Land Application/Waste Sites/Tanks 8,482 17,010 63 4   680 11  
Legacy/Historical Pollutants 6,229 755,777 1,867 8   212 867 13,991
Military Bases 20 2,639            
Municipal Discharges/Sewage 59,284 542,672 4,979 370 114 72,341 305  
Natural/Wildlife 50,203 953,091 3,167 1 1 9,378 0  
Other 7,579 739,201 4,471     237   25
Recreation And Tourism (Non-Boating) 1,598 177,431 7 0 5      
Recreational Boating And Marinas 138 28,215 520 106 8 72,320    
Resource Extraction 33,921 520,611 320     32,112    
Silviculture (Forestry) 40,637 159,920 0          
Spills/Dumping 4,375 176,323 2,926 13 2 6 3  
Unknown 139,491 3,727,464 8,970 542 116 455,416 144 310
Unspecified Nonpoint Source 54,009 827,369 3,363 103 4 1,324 6  
Urban-Related Runoff/Stormwater 61,584 642,256 2,981 268 379 54 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 159 219
2005 color.gif 107 241
2006 color.gif 85 103
2007 color.gif 245 458
2008 color.gif 344 488
2009 color.gif 318 542
2010 color.gif 350 452
2011 color.gif 294 387
2012 color.gif 278 433
2013 color.gif 302 362
2014 color.gif 350 518
2015 color.gif 76 108
2016 color.gif 13 14

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Impaired Waters Listed By State

Description of this table
Alabama color.gif 220
Alaska color.gif 35
American Samoa color.gif 45
Arizona color.gif 90
Arkansas color.gif 225
California color.gif 1,052
Colorado color.gif 293
Connecticut color.gif 286
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 571
Kansas color.gif 1,372
Kentucky color.gif 1,433
Louisiana color.gif 236
Maine color.gif 113
Maryland color.gif 337
Massachusetts color.gif 695
Michigan color.gif 2,584
Minnesota color.gif 1,592
Mississippi color.gif 261
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 710
New Mexico color.gif 239
New York color.gif 611
North Carolina color.gif 1,152
North Dakota color.gif 217
Ohio color.gif 267
Oklahoma color.gif 635
Oregon color.gif 1,397
Pennsylvania color.gif 6,957
Puerto Rico color.gif 195
Rhode Island color.gif 121
South Carolina color.gif 907
South Dakota color.gif 166
Tennessee color.gif 1,012
Texas color.gif 719
Utah color.gif 268
Vermont color.gif 101
Virgin Islands color.gif 87
Virginia color.gif 1,490
Washington color.gif 2,420
West Virginia color.gif 1,097
Wisconsin color.gif 663
Wyoming color.gif 107

Total: 42,457 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 21,615 21,645
Pathogens color.gif 13,283 13,592
Metals (other than Mercury) color.gif 9,981 10,180
Nutrients color.gif 6,226 7,602
Sediment color.gif 3,944 4,596
Temperature color.gif 2,329 2,339
Organic Enrichment/Oxygen Depletion color.gif 2,195 2,319
pH/Acidity/Caustic Conditions color.gif 1,963 2,022
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 1,724 1,782
Turbidity color.gif 1,616 1,842
Pesticides color.gif 1,351 1,514
Ammonia color.gif 1,142 1,249
Polychlorinated Biphenyls (PCBs) color.gif 501 521
Chlorine color.gif 335 341
Other Cause color.gif 268 323
Toxic Inorganics color.gif 207 207
Toxic Organics color.gif 158 199
Cause Unknown - Impaired Biota color.gif 128 132
Total Toxics color.gif 120 130
Algal Growth color.gif 95 103
Habitat Alterations color.gif 83 84
Trash color.gif 75 75
Dioxins color.gif 27 28
Noxious Aquatic Plants color.gif 21 22
Radiation color.gif 20 23
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: 69,433 TMDLs; 72,899 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 305
Alaska color.gif 60
American Samoa color.gif 43
Arizona color.gif 90
Arkansas color.gif 327
California color.gif 2,066
Colorado color.gif 1,016
Connecticut color.gif 407
Delaware color.gif 581
District Of Columbia color.gif 385
Florida color.gif 2,246
Georgia color.gif 1,700
Guam color.gif 43
Hawaii color.gif 65
Idaho color.gif 2,211
Illinois color.gif 429
Indiana color.gif 1,305
Iowa color.gif 217
Kansas color.gif 3,340
Kentucky color.gif 345
Louisiana color.gif 756
Maine color.gif 341
Maryland color.gif 831
Massachusetts color.gif 616
Michigan color.gif 238
Minnesota color.gif 1,802
Mississippi color.gif 1,440
Missouri color.gif 288
Montana color.gif 1,444
Nebraska color.gif 171
Nevada color.gif 67
New Hampshire color.gif 6,055
New Jersey color.gif 659
New Mexico color.gif 349
New York color.gif 719
North Carolina color.gif 13,448
North Dakota color.gif 137
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 524
South Dakota color.gif 399
Tennessee color.gif 1,276
Texas color.gif 268
Utah color.gif 324
Vermont color.gif 119
Virgin Islands color.gif 66
Virginia color.gif 1,500
Washington color.gif 1,512
West Virginia color.gif 4,866
Wisconsin color.gif 247
Wyoming color.gif 394

Total: 69,433 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 340 354
1998 color.gif 402 408
1999 color.gif 330 373
2000 color.gif 1,561 1,588
2001 color.gif 2,581 2,617
2002 color.gif 2,735 2,815
2003 color.gif 3,008 3,281
2004 color.gif 3,393 3,651
2005 color.gif 4,319 4,634
2006 color.gif 4,206 4,557
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 2,841 3,124
2012 color.gif 2,906 3,174
2013 color.gif 15,534 15,624
2014 color.gif 3,337 3,509
2015 color.gif 945 1,069
2016 color.gif 304 457

Total: 69,433 TMDLs; 72,899 Causes of Impairment Addressed

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Status of Available Data Used in This Report

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


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