Jump to main content.


Return to home page

On This Page

For More Information:

Download Excel compatible information

Download GIS Information (Internet Explorer only)

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
 
    486,589 5,750,958 9,379 1,154 618 573,947 78 62
    7,305 130,709            
    520,632 12,071,101 23,613 7,291 1,059 538,492 4,353 53,270
1,014,526 17,952,768 32,992 8,445 1,677 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
28.7 43.1 37.6 14.4 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   2  

Top of page


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 1,014,526
Unassessed 2,518,679
Total Miles 3,533,205







arrow pointing right
Description of this table

Assessed
Rivers and Streams

1,014,525.8 Miles of
Assessed Rivers and Streams

Good 486,589
Threatened 7,305
Impaired 520,632
Total Miles Assessed 1,014,526

Top of page

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 796,132 57.0 .6 42.4 color.gifcolor.gifcolor.gif
Recreation Recreation 425,555 59.0 1.4 39.5 color.gifcolor.gifcolor.gif
Agricultural Agricultural 355,316 95.5 .2 4.4 color.gifcolor.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 258,294 35.9 .9 63.2 color.gifcolor.gifcolor.gif
Public Water Supply Public Water Supply 201,688 77.9 .2 22.0 color.gifcolor.gifcolor.gif
Industrial Industrial 197,136 97.8 .0 2.2 color.gifcolor.gif
Hydropower Generation Other 85,231 97.9 .0 2.1 color.gifcolor.gif
Aesthetic Value Aesthetic Value 28,735 92.8 .0 7.2 color.gifcolor.gif
Exceptional Recreational or Ecological Significance Exceptional Recreational Or Ecological Significance 2,483 74.9 .0 25.1 color.gifcolor.gif

Top of page

National Summary
Causes of Impairment in Assessed Rivers and Streams

Description of this table
Pathogens color.gif 163,955
Sediment color.gif 120,733
Nutrients color.gif 104,110
Organic Enrichment/Oxygen Depletion color.gif 87,773
Polychlorinated Biphenyls (PCBs) color.gif 79,570
Metals (other than Mercury) color.gif 76,392
Temperature color.gif 68,735
Mercury color.gif 65,021
Habitat Alterations color.gif 63,766
Flow Alteration(s) color.gif 41,985
Cause Unknown color.gif 39,214
Cause Unknown - Impaired Biota color.gif 39,139
Turbidity color.gif 36,929
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 34,292
pH/Acidity/Caustic Conditions color.gif 28,936
Pesticides color.gif 18,872
Ammonia color.gif 12,196
Other Cause color.gif 12,020
Total Toxics color.gif 10,729
Fish Consumption Advisory color.gif 9,916
Toxic Inorganics color.gif 7,641
Algal Growth color.gif 6,080
Toxic Organics color.gif 4,943
Dioxins color.gif 4,600
Oil and Grease color.gif 3,084
Biotoxins color.gif 2,150
Nuisance Exotic Species color.gif 1,448
Trash color.gif 1,233
Taste, Color and Odor color.gif 854
Chlorine color.gif 732
Cause Unknown - Fish Kills color.gif 688
Radiation color.gif 677
Noxious Aquatic Plants color.gif 362
Nuisance Native Species color.gif 127

Top of page

National Summary
Probable Sources of Impairments in Assessed Rivers and Streams

Description of this table
Agriculture color.gif 129,543
Unknown color.gif 102,514
Atmospheric Deposition color.gif 100,207
Hydromodification color.gif 60,575
Urban-Related Runoff/Stormwater color.gif 59,509
Municipal Discharges/Sewage color.gif 57,154
Natural/Wildlife color.gif 52,521
Unspecified Nonpoint Source color.gif 48,040
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 35,039
Resource Extraction color.gif 28,697
Silviculture (Forestry) color.gif 19,592
Industrial color.gif 17,410
Construction color.gif 12,958
Other color.gif 9,974
Land Application/Waste Sites/Tanks color.gif 9,397
Legacy/Historical Pollutants color.gif 5,640
Spills/Dumping color.gif 2,991
Recreation And Tourism (Non-Boating) color.gif 1,564
Aquaculture color.gif 304
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 42

Top of page


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 17,952,768
Unassessed 23,713,281
Total Acres 41,666,049







arrow pointing right
Description of this table

Assessed
Lakes, Reservoirs, and Ponds

17,952,767.6 Acres of
Assessed Lakes, Reservoirs, and Ponds

Good 5,750,958
Threatened 130,709
Impaired 12,071,101
Total Acres Assessed 17,952,768

Top of page

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
Aquatic Life Harvesting Aquatic Life Harvesting 10,126,433 25.2 1.1 73.7 color.gifcolor.gifcolor.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 9,945,773 57.9 1.3 40.9 color.gifcolor.gifcolor.gif
Recreation Recreation 8,357,063 85.9 1.5 12.5 color.gifcolor.gifcolor.gif
Public Water Supply Public Water Supply 6,459,361 79.8 1.7 18.5 color.gifcolor.gifcolor.gif
Agricultural Agricultural 5,123,617 95.6 .0 4.4 color.gifcolor.gif
Industrial Industrial 3,318,772 99.9 .0 .1 color.gifcolor.gif
Hydropower Generation Other 2,520,363 87.4 .0 12.6 color.gifcolor.gif
Aesthetic Value Aesthetic Value 1,218,629 51.8 .0 48.2 color.gifcolor.gif

Top of page

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

Description of this table
Mercury color.gif 7,811,510
Nutrients color.gif 3,160,721
Polychlorinated Biphenyls (PCBs) color.gif 2,953,705
Turbidity color.gif 1,467,399
Organic Enrichment/Oxygen Depletion color.gif 1,401,808
Metals (other than Mercury) color.gif 956,184
pH/Acidity/Caustic Conditions color.gif 916,239
Algal Growth color.gif 914,563
Sediment color.gif 761,496
Nuisance Exotic Species color.gif 752,707
Fish Consumption Advisory color.gif 539,504
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 459,494
Habitat Alterations color.gif 319,198
Pathogens color.gif 315,693
Pesticides color.gif 258,741
Temperature color.gif 218,251
Ammonia color.gif 208,563
Other Cause color.gif 196,433
Flow Alteration(s) color.gif 187,888
Taste, Color and Odor color.gif 162,678
Dioxins color.gif 124,889
Nuisance Native Species color.gif 100,624
Noxious Aquatic Plants color.gif 84,113
Cause Unknown - Impaired Biota color.gif 57,780
Cause Unknown color.gif 39,654
Biotoxins color.gif 17,628
Total Toxics color.gif 12,834
Toxic Organics color.gif 9,806
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

Top of page

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

Description of this table
Atmospheric Deposition color.gif 4,852,204
Unknown color.gif 3,147,234
Agriculture color.gif 959,437
Legacy/Historical Pollutants color.gif 780,735
Other color.gif 766,300
Natural/Wildlife color.gif 737,383
Municipal Discharges/Sewage color.gif 705,220
Urban-Related Runoff/Stormwater color.gif 695,206
Hydromodification color.gif 621,889
Unspecified Nonpoint Source color.gif 591,856
Resource Extraction color.gif 377,832
Construction color.gif 242,076
Industrial color.gif 212,135
Spills/Dumping color.gif 202,719
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 191,611
Silviculture (Forestry) color.gif 135,920
Recreation And Tourism (Non-Boating) color.gif 107,520
Land Application/Waste Sites/Tanks color.gif 55,166
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

Top of page


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 32,992
Unassessed 54,799
Total Square Miles 87,791







arrow pointing right
Description of this table

Assessed
Bays and Estuaries

32,991.7 Square Miles of
Assessed Bays and Estuaries

Good 9,379
Threatened 0
Impaired 23,613
Total Square Miles Assessed 32,992

Top of page

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 23,819 25.4 .0 74.6 color.gifcolor.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 19,425 42.0 .0 58.0 color.gifcolor.gif
Recreation Recreation 14,027 68.1 .0 31.9 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 3,203 98.9 .0 1.1 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

Top of page

National Summary
Causes of Impairment in Assessed Bays and Estuaries

Description of this table
Mercury color.gif 10,821
Polychlorinated Biphenyls (PCBs) color.gif 7,601
Pathogens color.gif 6,883
Organic Enrichment/Oxygen Depletion color.gif 5,435
Dioxins color.gif 4,462
Other Cause color.gif 3,431
Fish Consumption Advisory color.gif 3,084
Noxious Aquatic Plants color.gif 1,855
Pesticides color.gif 1,806
Metals (other than Mercury) color.gif 1,779
Algal Growth color.gif 1,553
Nutrients color.gif 1,264
Cause Unknown - Impaired Biota color.gif 1,178
Nuisance Exotic Species color.gif 763
Toxic Organics color.gif 713
Trash color.gif 434
Turbidity color.gif 378
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 96
Ammonia color.gif 48
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 44
Cause Unknown color.gif 40
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

Top of page

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 5,550
Other color.gif 4,465
Industrial color.gif 4,326
Natural/Wildlife color.gif 3,523
Urban-Related Runoff/Stormwater color.gif 3,182
Spills/Dumping color.gif 3,162
Unspecified Nonpoint Source color.gif 2,603
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

Top of page


National Summary
Water Quality Attainment in Assessed Coastal Shoreline

Description of this table

All
Coastal Shoreline

58,618.0 Miles of Coastal Shoreline

Assessed 8,445
Unassessed 50,173
Total Miles 58,618







arrow pointing right
Description of this table

Assessed
Coastal Shoreline

8,445.0 Miles of
Assessed Coastal Shoreline

Good 1,154
Threatened 0
Impaired 7,291
Total Miles Assessed 8,445

Top of page

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 7,399 9.0 .0 91.0 color.gifcolor.gif
Recreation Recreation 1,612 78.4 .0 21.6 color.gifcolor.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 729 52.5 .0 47.5 color.gifcolor.gif
Aesthetic Value Aesthetic Value 235 100.0 .0 .0 color.gif
Hydropower Generation Other 87 .0 .0 100.0 color.gif
Industrial Industrial 30 83.3 .0 16.7 color.gifcolor.gif

Top of page

National Summary
Causes of Impairment in Assessed Coastal Shoreline

Description of this table
Mercury color.gif 6,473
Pathogens color.gif 1,086
Organic Enrichment/Oxygen Depletion color.gif 490
Turbidity color.gif 213
pH/Acidity/Caustic Conditions color.gif 138
Nutrients color.gif 124
Algal Growth color.gif 91
Polychlorinated Biphenyls (PCBs) color.gif 76
Cause Unknown - Impaired Biota color.gif 70
Metals (other than Mercury) color.gif 62
Temperature color.gif 50
Other Cause color.gif 45
Pesticides color.gif 44
Ammonia color.gif 21
Oil and Grease color.gif 13
Sediment color.gif 5

Top of page

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 382
Urban-Related Runoff/Stormwater color.gif 324
Hydromodification color.gif 143
Unspecified Nonpoint Source color.gif 135
Agriculture color.gif 126
Industrial color.gif 119
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
Recreation And Tourism (Non-Boating) color.gif 0
Resource Extraction color.gif 0

Top of page


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 1,677
Unassessed 52,443
Total Square Miles 54,120







arrow pointing right
Description of this table

Assessed
Ocean and Near Coastal

1,677.4 Square Miles of
Assessed Ocean and Near Coastal

Good 618
Threatened 0
Impaired 1,059
Total Square Miles Assessed 1,677

Top of page

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 1,129 97.1 .0 2.9 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

Top of page

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 81
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

Top of page

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

Top of page


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







arrow pointing right
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

Top of page

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 19,032 100.0 .0 .0 color.gif
Hydropower Generation Other 719 100.0 .0 .0 color.gif

Top of page

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
Toxic Inorganics color.gif 28,053
Metals (other than Mercury) color.gif 26,248
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
Cause Unknown color.gif 1,000
Fish Consumption Advisory 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
Toxic Organics color.gif 0
Pesticides color.gif 0
Ammonia color.gif 0
Total Toxics color.gif 0

Top of page

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

Top of page


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







arrow pointing right
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

Top of page

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

Top of page

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

Top of page

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
Spills/Dumping color.gif 18
Construction color.gif 18
Land Application/Waste Sites/Tanks color.gif 11
Unspecified Nonpoint Source color.gif 6
Natural/Wildlife color.gif 0

Top of page


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







arrow pointing right
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

Top of page

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
Industrial Industrial 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
Public Water Supply Public Water Supply 151 100.0 .0 .0 color.gif
Recreation Recreation 151 100.0 .0 .0 color.gif

Top of page

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

Top of page

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

Top of page



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 6,080 914,563 1,553 91   4,631 191  
Ammonia 12,196 208,563 48 21 1 0    
Biotoxins 2,150 17,628            
Cause Unknown 39,214 39,654 40     1,000    
Cause Unknown - Fish Kills 688 9,391       1,034    
Cause Unknown - Impaired Biota 39,139 57,780 1,178 70   973    
Chlorine 732 3,208 5          
Dioxins 4,600 124,889 4,462   9   3,471 38,862
Fish Consumption Advisory 9,916 539,504 3,084 0   1,000 285 14,087
Flow Alteration(s) 41,985 187,888 3     4,037 202  
Habitat Alterations 63,766 319,198 2   10 1,754 170  
Mercury 65,021 7,811,510 10,821 6,473 796 246,160 2,194 29,968
Metals (other than Mercury) 76,392 956,184 1,779 62 15 26,248    
Noxious Aquatic Plants 362 84,113 1,855     940    
Nuisance Exotic Species 1,448 752,707 763   35 2,104 307 25
Nuisance Native Species 127 100,624 4          
Nutrients 104,110 3,160,721 1,264 124 7 1,720 380  
Oil and Grease 3,084 1,331 101 13        
Organic Enrichment/Oxygen Depletion 87,773 1,401,808 5,435 490 579 396,167 138 13,867
Other Cause 12,020 196,433 3,431 45     19  
Pathogens 163,955 315,693 6,883 1,086 81 72,349 621  
Pesticides 18,872 258,741 1,806 44 567 0 2,483 29,661
pH/Acidity/Caustic Conditions 28,936 916,239 96 138 7 838    
Polychlorinated Biphenyls (PCBs) 79,570 2,953,705 7,601 76 531 707 4,064 39,183
Radiation 677 48            
Salinity/Total Dissolved Solids/Chlorides/Sulfates 34,292 459,494 44     299    
Sediment 120,733 761,496 224 5   10,786 319  
Taste, Color and Odor 854 162,678 7          
Temperature 68,735 218,251 165 50 1 14,900    
Total Toxics 10,729 12,834 333   29 0   192
Toxic Inorganics 7,641 6,170 6     28,053 5  
Toxic Organics 4,943 9,806 713   14 0    
Trash 1,233 4,600 434     0 3  
Turbidity 36,929 1,467,399 378 213 24 3,915    

Top of page



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 129,543 959,437 2,583 126   201,776 620 4,373
Aquaculture 304 4,620 0 5        
Atmospheric Deposition 100,207 4,852,204 8,372 388 777 200,741 3,411 53,270
Commercial Harbor And Port Activities 52   495   0      
Construction 12,958 242,076 4   4 1,000 18  
Groundwater Loadings/Withdrawals 270 438 0          
Habitat Alterations (Not Directly Related To Hydromodification) 35,039 191,611 2,201       90  
Hydromodification 60,575 621,889 2,065 143 7 6,870 231  
Industrial 17,410 212,135 4,326 119 4 195,980 72  
Land Application/Waste Sites     1          
Land Application/Waste Sites/Tanks 9,397 55,166 84 7   680 11  
Legacy/Historical Pollutants 5,640 780,735 1,563 8     867 13,991
Military Bases 42 2,639            
Municipal Discharges/Sewage 57,154 705,220 5,550 382 114 72,341 305  
Natural/Wildlife 52,521 737,383 3,523 1 1 8,332 0  
Other 9,974 766,300 4,465     237   25
Recreation And Tourism (Non-Boating) 1,564 107,520 10 0 5      
Recreational Boating And Marinas 142 34,724 794 65 8 72,320    
Resource Extraction 28,697 377,832 780 0   32,215    
Silviculture (Forestry) 19,592 135,920 0          
Spills/Dumping 2,991 202,719 3,162 13 2   18  
Unknown 102,514 3,147,234 5,781 487 604 333,053 144 310
Unspecified Nonpoint Source 48,040 591,856 2,603 135 4 1,098 6  
Urban-Related Runoff/Stormwater 59,509 695,206 3,182 324 453 104 99 13,867

Top of page



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 233 443
2008 color.gif 339 423
2009 color.gif 318 539
2010 color.gif 344 435
2011 color.gif 252 307
2012 color.gif 249 380
2013 color.gif 17 18

Top of page


Impaired Waters Listed By State

Description of this table
Alabama color.gif 283
Alaska color.gif 35
American Samoa color.gif 44
Arizona color.gif 79
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 215
Guam color.gif 47
Hawaii color.gif 309
Idaho color.gif 916
Illinois color.gif 1,057
Indiana color.gif 1,836
Iowa color.gif 480
Kansas color.gif 1,372
Kentucky color.gif 1,300
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 257
Montana color.gif 584
N. Mariana Islands color.gif 24
Nebraska color.gif 330
Nevada color.gif 215
New Hampshire color.gif 1,449
New Jersey color.gif 716
New Mexico color.gif 209
New York color.gif 1,543
North Carolina color.gif 1,270
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 961
South Dakota color.gif 155
Tennessee color.gif 1,028
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: 42,709 impaired waters


Top of page



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
Pathogens color.gif 12,330 12,623
Metals (other than Mercury) color.gif 9,395 9,584
Mercury color.gif 7,153 7,181
Nutrients color.gif 5,766 6,922
Sediment color.gif 3,880 4,510
Temperature color.gif 2,249 2,259
Organic Enrichment/Oxygen Depletion color.gif 2,127 2,246
pH/Acidity/Caustic Conditions color.gif 1,927 1,986
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 1,644 1,702
Turbidity color.gif 1,486 1,691
Pesticides color.gif 1,207 1,306
Ammonia color.gif 1,106 1,170
Polychlorinated Biphenyls (PCBs) color.gif 499 520
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 87 95
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: 52,310 TMDLs; 55,374 Causes of Impairment Addressed

Top of page



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 317
California color.gif 1,637
Colorado color.gif 1,005
Connecticut color.gif 372
Delaware color.gif 579
District Of Columbia color.gif 371
Florida color.gif 1,063
Georgia color.gif 1,705
Guam color.gif 18
Hawaii color.gif 64
Idaho color.gif 2,109
Illinois color.gif 427
Indiana color.gif 1,123
Iowa color.gif 201
Kansas color.gif 3,181
Kentucky color.gif 302
Louisiana color.gif 750
Maine color.gif 337
Maryland color.gif 795
Massachusetts color.gif 581
Michigan color.gif 238
Minnesota color.gif 1,590
Mississippi color.gif 1,438
Missouri color.gif 288
Montana color.gif 1,328
Nebraska color.gif 143
Nevada color.gif 67
New Hampshire color.gif 6,050
New Jersey color.gif 616
New Mexico color.gif 322
New York color.gif 666
North Carolina color.gif 264
North Dakota color.gif 136
Ohio color.gif 1,703
Oklahoma color.gif 641
Oregon color.gif 1,241
Pennsylvania color.gif 7,138
Puerto Rico color.gif 321
Rhode Island color.gif 210
South Carolina color.gif 516
South Dakota color.gif 329
Tennessee color.gif 1,240
Texas color.gif 247
Utah color.gif 311
Vermont color.gif 119
Virgin Islands color.gif 66
Virginia color.gif 1,452
Washington color.gif 1,486
West Virginia color.gif 4,123
Wisconsin color.gif 247
Wyoming color.gif 386

Total: 52,310 TMDLs


Top of page



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 1,556 1,581
2001 color.gif 2,580 2,616
2002 color.gif 2,743 2,823
2003 color.gif 2,999 3,272
2004 color.gif 3,378 3,636
2005 color.gif 4,319 4,634
2006 color.gif 4,208 4,559
2007 color.gif 4,321 4,651
2008 color.gif 9,262 9,545
2009 color.gif 4,399 4,625
2010 color.gif 2,572 2,708
2011 color.gif 2,830 3,113
2012 color.gif 2,883 3,151
2013 color.gif 2,359 2,447
2014 color.gif 697 745

Total: 52,310 TMDLs; 55,374 Causes of Impairment Addressed

Top of page


Status of Available Data Used in This Report

Description of this table
Alabama 2012 2012
Alaska 2010 2010
American Samoa 2010 2010
Arizona 2008 2008
Arkansas 2008 2008
California 2010 2010
Colorado 2010 2010
Connecticut 2012 2012
Delaware 2006 2006
District Of Columbia 2010 2010
Florida 2010 2010
Georgia 2010 2010
Guam 2010 2010
Hawaii 2006 2006
Idaho 2010 2010
Illinois 2010 2006
Indiana 2010 2008
Iowa 2012 2012
Kansas 2014 2014
Kentucky 2010 2010
Louisiana 2012 2012
Maine 2010 2010
Maryland 2002 2010
Massachusetts 2012 2012
Michigan 2010 2008
Minnesota 2010 2008
Mississippi 2012 2012
Missouri 2012 2012
Montana 2012 2012
N. Mariana Islands 2010 2010
Nebraska 2014 2012
Nevada 2010 2010
New Hampshire 2010 2010
New Jersey 2010 2010
New Mexico 2012 2012
New York 2012 2012
North Carolina 2010 2010
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 2010 2010
South Dakota 2010 2012
Tennessee 2010 2010
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


TMDL Document Search


Full Text Search of TMDL Documents

Top of page

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 Trust Territories Utah Vermont Virgin Islands Virginia Washington West Virginia