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National Assessment Data 2002

Assessed Waters of the United States by Water Type Water Quality by Waterbody Type Rivers, Streams, and Creeks Individual Use Support for Assessed Waters Water Quality Attainment for Assessed Waters Top Ten National Causes of Impairments Top Ten National Probable Sources of Impairments Lakes, Ponds, and Reservoirs Individual Use Support for Assessed Waters Water Quality Attainment for Assessed Waters Top Ten National Causes of Impairments Top Ten National Probable Sources of Impairments Bays and Estuaries Individual Use Support for Assessed Waters Water Quality Attainment for Assessed Waters Top Ten National Causes of Impairments Top Ten National Probable Sources of Impairments Coastal Shorelines Individual Use Support for Assessed Waters Water Quality Attainment for Assessed Waters Top Ten National Causes of Impairments Top Ten National Probable Sources of Impairments Oceans, and Near Coastal Waters Individual Use Support for Assessed Waters Water Quality Attainment for Assessed Waters Top Ten National Causes of Impairments Top Ten National Probable Sources of Impairments Wetlands Individual Use Support for Assessed Waters Water Quality Attainment for Assessed Waters Top Ten National Causes of Impairments Top Ten National Probable Sources of Impairments Great Lakes Shoreline Individual Use Support for Assessed Waters Water Quality Attainment for Assessed Waters Top Ten National Causes of Impairments Top Ten National Probable Sources of Impairments Great Lakes Open Water Individual Use Support for Assessed Waters Water Quality Attainment for Assessed Waters Top Ten National Causes of Impairments Top Ten National Probable Sources of Impairments Causes of Impairment Probable Sources Contributing to Impairment State URL for Water Quality Hardcopy 305(b) Summary Report Glossary

National Assessment Database About this Database Assessing Water Quality (Questions and Answers) National Water Quality Inventory Report to Congress, 2002 Reporting Cycle The 2002 National Assessment Database (Fact Sheet) Previous National Water Quality Reports EnviroMapper for Water

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Assessed Waters of the United States

Description of this table

	Size Of Water
	Rivers, Streams, Creeks (Miles)	Lakes, Ponds, Reservoir (Acres)	Bays, Estuaries (Square Miles)	Coastal Shorelines (Miles)	Oceans, Near Coastal Waters (Square Miles)	Wetlands (Acres)	Great Lakes Shoreline (Miles)	Great Lakes Open Water (Square Miles)
Total Assessed Waters	695,540.37	14,831,882.35	30,445.72	2,570.68	4,952.42	1,255,423.63	519.22	50,866.46
Estimated Total Water Size in US	3,692,830.00	40,603,893.00	87,369.00	58,618.00	54,120.00	105,500,000.00	5,521.00	60,546.00
Percent of Waters Assessed	18.83	36.53	34.85	4.39	9.15	1.19	9.40	84.01

National Assessed Waters
Individual Use Support for Rivers and Streams

Description of this table

EPA Designated Use		Total Miles Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
						% Threatened
						% Impaired
	Fish, Shellfish, and Wildlife Protection and Propagation	596,433.07	55.37	3.73	40.90
	Recreation	321,749.90	64.12	3.03	32.85
	Public Water Supply	150,491.90	80.69	1.54	17.78
	Aquatic Life Harvesting	186,720.91	56.98	16.03	27.00
	Agricultural	189,331.50	92.02	.77	7.20
	Industrial	35,917.02	73.60	.15	26.25
	Aesthetic Value	25,184.71	76.43	.91	22.66
	Other	18,998.94	27.71	1.35	70.93
	Exceptional Recreational or Ecological Significance	15,908.86	11.05	4.72	84.23

695,540.37 miles of rivers and streams were assessed, or 18.83% of 3,692,830.00 total miles.

National Assessed Waters
Water Quality Attainment for Rivers and Streams

Description of this table

Attainment Status	Miles	Percent of Assessed
Good	358,034.88	51.48
Threatened	27,749.97	3.99
Impaired	309,755.53	44.53
Total Miles Assessed	695,540.37	100.00

Top Ten National Causes of Impairments
for Rivers and Streams

Description of this table

	Cause Name	Total Miles Impaired
1	SEDIMENT/SILTATION	100,445.87
2	PATHOGENS	82,132.98
3	HABITAT ALTERATIONS	80,974.29
4	METALS	52,809.48
5	NUTRIENTS	52,227.56
6	THERMAL MODIFICATIONS	51,738.32
7	ORGANIC ENRICHMENT/LOW DISSOLVED OXYGEN	51,549.52
8	FLOW ALTERATIONS	48,925.16
9	CAUSE UNKNOWN	25,180.67
10	pH/ACIDITY/CAUSTIC CONDITIONS	18,295.47

Top Ten National Sources of Impairments
for Rivers and Streams

Description of this table

	EPA Source Name	Total Miles Impaired by Source
1	AGRICULTURE	113,662.70
2	UNKNOWN	91,823.72
3	HYDROMODIFICATION	79,399.66
4	HABITAT ALTERATIONS (NOT DIRECTLY RELATED TO HYDROMODIFICATION)	51,297.85
5	NATURAL	41,764.05
6	URBAN-RELATED RUNOFF/STORMWATER	38,114.89
7	MUNICIPAL PERMITTED DISCHARGES (DIRECT AND INDIRECT)	32,438.24
8	RESOURCE EXTRACTION	28,722.37
9	SILVICULTURE (FORESTRY)	18,463.23
10	INDUSTRIAL	17,405.02

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National Assessed Waters
Individual Use Support for Lakes, Ponds and Reservoirs

Description of this table

EPA Designated Use		Total Acres Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
						% Threatened
						% Impaired
	Fish, Shellfish, and Wildlife Protection and Propagation	9,738,350.58	45.92	7.23	46.85
	Recreation	9,564,367.35	60.26	3.44	36.30
	Public Water Supply	5,669,056.67	74.55	3.51	21.94
	Aquatic Life Harvesting	4,562,746.31	40.78	11.45	47.77
	Agricultural	2,931,969.88	70.84	12.83	16.33
	Industrial	1,678,879.85	69.50	.28	30.22
	Aesthetic Value	1,031,627.90	51.09	2.21	46.70
	Other	971,409.76	32.38	.99	66.63
	Exceptional Recreational or Ecological Significance	767,060.25	9.12	3.16	87.73

14,831,882.35 acres of lakes, ponds and reservoirs were assessed, or 36.53% of 40,603,893.00 total acres.

National Assessed Waters
Water Quality Attainment for Lakes, Ponds and Reservoirs

Description of this table

Attainment Status	Acres	Percent of Assessed
Good	7,073,207.01	47.69
Threatened	810,774.82	5.47
Impaired	6,947,900.51	46.84
Total Acres Assessed	14,831,882.35	100.00

Top Ten National Causes of Impairments
for Lakes, Ponds and Reservoirs

Description of this table

	Cause Name	Total Acres Impaired
1	NUTRIENTS	2,864,710.69
2	METALS	2,827,608.22
3	ORGANIC ENRICHMENT/LOW DISSOLVED OXYGEN	1,339,070.42
4	SEDIMENT/SILTATION	1,317,938.02
5	NUISANCE EXOTIC SPECIES	1,264,022.52
6	TOXIC ORGANICS	801,595.96
7	HARMFUL ALGAL BLOOMS (HABs)	724,042.98
8	SALINITY/TDS/CHLORIDES	650,960.72
9	FLOW ALTERATIONS	592,360.99
10	TURBIDITY	487,784.09

Top Ten National Sources of Impairments
for Lakes, Ponds and Reservoirs

Description of this table

	EPA Source Name	Total Acres Impaired by Source
1	UNKNOWN	2,743,374.10
2	AGRICULTURE	2,093,641.13
3	ATMOSPHERIC DEPOSITION	1,829,672.24
4	LAND APPLICATION/WASTE SITES	1,540,223.99
5	HYDROMODIFICATION	1,525,224.08
6	OTHER	1,295,104.21
7	NATURAL	1,251,035.22
8	SPILLS AND UNPERMITTED DISCHARGES	1,164,089.76
9	URBAN-RELATED RUNOFF/STORMWATER	948,420.23
10	MUNICIPAL PERMITTED DISCHARGES (DIRECT AND INDIRECT)	823,510.09

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National Assessed Waters
Individual Use Support for Bays and Estuaries

Description of this table

EPA Designated Use		Total Square Miles Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
						% Threatened
						% Impaired
	Fish, Shellfish, and Wildlife Protection and Propagation	29,064.49	68.59	2.55	28.86
	Recreation	9,289.96	84.48	.53	14.99
	Public Water Supply	213.93	22.31	.00	77.69
	Aquatic Life Harvesting	10,024.82	67.60	3.47	28.93
	Industrial	570.32	74.06	.02	25.92
	Exceptional Recreational or Ecological Significance	561.56	.79	.00	99.21
	Aesthetic Value	342.38	37.23	.00	62.77
	Other	299.19	28.00	.00	72.00
	Agricultural	92.06	42.39	.00	57.61

30,445.72 square miles of bays and estuaries were assessed, or 34.85% of 87,369.00 total square miles.

National Assessed Waters
Water Quality Attainment for Bays and Estuaries

Description of this table

Attainment Status	Square Miles	Percent of Assessed
Good	19,915.70	65.41
Threatened	694.27	2.28
Impaired	9,835.75	32.31
Total Square Miles Assessed	30,445.72	100.00

Top Ten National Causes of Impairments
for Bays and Estuaries

Description of this table

	Cause Name	Total Square Miles Impaired
1	METALS	4,939.58
2	NUTRIENTS	2,229.23
3	ORGANIC ENRICHMENT/LOW DISSOLVED OXYGEN	2,214.03
4	PATHOGENS	2,141.23
5	CAUSE UNKNOWN	2,048.17
6	BIOLOGIC INTEGRITY (BIOASSESSMENTS)	1,965.36
7	TURBIDITY	1,622.12
8	PESTICIDES	1,255.70
9	HARMFUL ALGAL BLOOMS (HABs)	1,220.74
10	TOXIC ORGANICS	1,130.19

Top Ten National Sources of Impairments
for Bays and Estuaries

Description of this table

	EPA Source Name	Total Square Miles Impaired by Source
1	UNKNOWN	5,235.23
2	INDUSTRIAL	4,905.69
3	MUNICIPAL PERMITTED DISCHARGES (DIRECT AND INDIRECT)	3,444.97
4	RESOURCE EXTRACTION	2,826.53
5	URBAN-RELATED RUNOFF/STORMWATER	2,742.70
6	ATMOSPHERIC DEPOSITION	2,580.14
7	OTHER	2,139.01
8	HYDROMODIFICATION	1,325.76
9	LAND APPLICATION/WASTE SITES	1,278.66
10	NATURAL	1,155.67

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National Assessed Waters
Individual Use Support for Coastal Shorelines

Description of this table

EPA Designated Use		Total Miles Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
						% Threatened
						% Impaired
	Fish, Shellfish, and Wildlife Protection and Propagation	2,488.06	82.63	.33	17.04
	Recreation	1,788.30	85.19	.00	14.81
	Public Water Supply	544.06	86.39	.00	13.61
	Aquatic Life Harvesting	1,316.79	83.18	.00	16.82
	Other	1,037.68	91.32	.00	8.68
	Exceptional Recreational or Ecological Significance	501.03	85.74	.00	14.26
	Agricultural	494.97	89.91	.00	10.09
	Aesthetic Value	445.01	100.00	.00	.00
	Industrial	302.74	79.46	.00	20.54

2,570.68 miles of coastal shorelines were assessed, or 4.39% of 58,618.00 total miles.

National Assessed Waters
Water Quality Attainment for Coastal Shorelines

Description of this table

Attainment Status	Miles	Percent of Assessed
Good	2,131.08	82.90
Threatened	8.20	.32
Impaired	431.40	16.78
Total Miles Assessed	2,570.68	100.00

Top Ten National Causes of Impairments
for Coastal Shorelines

Description of this table

	Cause Name	Total Miles Impaired
1	PATHOGENS	274.50
2	METALS	157.82
3	PESTICIDES	137.51
4	DIOXINS	108.10
5	NUTRIENTS	99.90
6	TOXIC ORGANICS	87.43
7	TURBIDITY	86.40
8	SUSPENDED SOLIDS	78.30
9	SEDIMENT/SILTATION	71.50
10	ORGANIC ENRICHMENT/LOW DISSOLVED OXYGEN	43.30

Top Ten National Sources of Impairments
for Coastal Shorelines

Description of this table

	EPA Source Name	Total Miles Impaired by Source
1	URBAN-RELATED RUNOFF/STORMWATER	230.69
2	UNKNOWN	139.06
3	INDUSTRIAL	131.56
4	NATURAL	119.34
5	AGRICULTURE	116.54
6	SPILLS AND UNPERMITTED DISCHARGES	63.31
7	MUNICIPAL PERMITTED DISCHARGES (DIRECT AND INDIRECT)	50.60
8	SEWAGE	50.26
9	OTHER	34.49
10	LAND APPLICATION/WASTE SITES	29.80

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National Assessed Waters
Individual Use Support for Oceans, and Near Coastal

Description of this table

EPA Designated Use		Total Square Miles Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
						% Threatened
						% Impaired
	Fish, Shellfish, and Wildlife Protection and Propagation	4,863.38	12.37	.01	87.62
	Recreation	2,407.55	99.78	.04	.18
	Public Water Supply	154.46	99.59	.00	.41
	Aquatic Life Harvesting	4,435.74	10.97	.00	89.03
	Other	100.07	99.37	.00	.63
	Exceptional Recreational or Ecological Significance	99.44	100.00	.00	.00
	Industrial	3.48	100.00	.00	.00

4,952.42 total assessed square miles of oceans, and near coastal were assessed, or 9.15% of 54,120.00 total square miles.

National Assessed Waters
Water Quality Attainment for Oceans, and Near Coastal

Description of this table

Attainment Status	Square Miles	Percent of Assessed
Good	620.20	12.52
Threatened	.65	.01
Impaired	4,331.57	87.46
Total Square Miles Assessed	4,952.42	100.00

Top Ten National Causes of Impairments
for Oceans, and Near Coastal

Description of this table

	Cause Name	Total Square Miles Impaired
1	METALS	3,949.33
2	TOXIC ORGANICS	70.33
3	DIOXINS	70.33
4	ORGANIC ENRICHMENT/LOW DISSOLVED OXYGEN	16.20
5	TURBIDITY	10.75
6	PATHOGENS	4.81
7	NUTRIENTS	1.83
8	pH/ACIDITY/CAUSTIC CONDITIONS	1.14
9	OIL AND GREASE	.52
10	SEDIMENT/SILTATION	.16

Top Ten National Sources of Impairments
for Oceans, and Near Coastal

Description of this table

	EPA Source Name	Total Square Miles Impaired by Source
1	ATMOSPHERIC DEPOSITION	3,949.33
2	UNKNOWN	70.33
3	LAND APPLICATION/WASTE SITES	3.75
4	RECREATION AND TOURISM (NON-BOATING)	3.54
5	RECREATIONAL BOATING AND MARINAS	3.35
6	HYDROMODIFICATION	2.61
7	URBAN-RELATED RUNOFF/STORMWATER	2.23
8	MUNICIPAL PERMITTED DISCHARGES (DIRECT AND INDIRECT)	1.86
9	SPILLS AND UNPERMITTED DISCHARGES	1.77
10	AGRICULTURE	1.14

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National Assessed Waters
Individual Use Support for Wetlands

Description of this table

EPA Designated Use		Total Acres Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
						% Threatened
						% Impaired
	Fish, Shellfish, and Wildlife Protection and Propagation	1,254,733.63	47.21	1.15	51.64
	Recreation	713,958.70	83.78	9.39	6.84
	Public Water Supply	586,228.14	81.92	.03	18.05
	Aquatic Life Harvesting	90,761.43	9.89	.00	90.11
	Exceptional Recreational or Ecological Significance	141,815.36	8.23	.35	91.42
	Industrial	111,684.05	43.27	.00	56.73
	Agricultural	86,157.51	41.05	.23	58.72
	Other	66,403.43	.00	.00	100.00

1,255,423.63 acres of wetlands were assessed, or 1.19% of 105,500,000.00 total acres.

National Assessed Waters
Water Quality Attainment for Wetlands

Description of this table

Attainment Status	Acres	Percent of Assessed
Good	592,345.50	47.18
Threatened	14,435.48	1.15
Impaired	648,642.65	51.67
Total Acres Assessed	1,255,423.63	100.00

Top Ten National Causes of Impairments
for Wetlands

Description of this table

	Cause Name	Total Acres Impaired
1	METALS	565,475.71
2	ORGANIC ENRICHMENT/LOW DISSOLVED OXYGEN	282,753.30
3	SEDIMENT/SILTATION	247,268.00
4	SALINITY/TDS/CHLORIDES	208,653.40
5	TURBIDITY	199,640.00
6	HABITAT ALTERATIONS	105,879.18
7	TOXIC INORGANICS	86,595.46
8	NUTRIENTS	79,741.34
9	FLOW ALTERATIONS	54,451.19
10	PATHOGENS	29,443.50

Top Ten National Sources of Impairments
for Wetlands

Description of this table

	EPA Source Name	Total Acres Impaired by Source
1	UNKNOWN	556,502.88
2	ATMOSPHERIC DEPOSITION	394,880.00
3	AGRICULTURE	228,178.63
4	NATURAL	149,317.95
5	HYDROMODIFICATION	133,292.49
6	OTHER	81,085.78
7	URBAN-RELATED RUNOFF/STORMWATER	79,582.43
8	MUNICIPAL PERMITTED DISCHARGES (DIRECT AND INDIRECT)	78,339.30
9	RESOURCE EXTRACTION	62,887.40
10	HABITAT ALTERATIONS (NOT DIRECTLY RELATED TO HYDROMODIFICATION)	14,841.72

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National Assessed Waters
Individual Use Support for Great Lakes Shoreline

Description of this table

EPA Designated Use		Total Miles Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
						% Threatened
						% Impaired
	Fish, Shellfish, and Wildlife Protection and Propagation	87.02	66.46	.00	33.54
	Recreation	143.82	34.20	.00	65.80
	Public Water Supply	33.44	100.00	.00	.00
	Aquatic Life Harvesting	477.92	2.89	.00	97.11
	Aesthetic Value	62.30	53.77	.00	46.23

519.22 miles of great lakes shoreline were assessed, or 9.40% of 5,521.00 total miles.

National Assessed Waters
Water Quality Attainment for Great Lakes Shoreline

Description of this table

Attainment Status	Miles	Percent of Assessed
Good	47.30	9.11
Threatened	.00	.00
Impaired	471.92	90.89
Total Miles Assessed	519.22	100.00

Top Ten National Causes of Impairments
for Great Lakes Shoreline

Description of this table

	Cause Name	Total Miles Impaired
1	PATHOGENS	87.83
2	METALS	60.72
3	TOXIC ORGANICS	59.22
4	HARMFUL ALGAL BLOOMS (HABs)	21.00
5	pH/ACIDITY/CAUSTIC CONDITIONS	1.50
6	TOXIC INORGANICS	1.39
7	HABITAT ALTERATIONS	.00
8	THERMAL MODIFICATIONS	.00
9	MINERALIZATION	.00
10	NOXIOUS AQUATIC PLANTS	.00

Top Ten National Sources of Impairments
for Great Lakes Shoreline

Description of this table

	EPA Source Name	Total Miles Impaired by Source
1	LEGACY/HISTORICAL POLLUTANTS	394.90
2	UNKNOWN	64.22
3	SEWAGE	25.00
4	URBAN-RELATED RUNOFF/STORMWATER	21.00
5	LAND APPLICATION/WASTE SITES	18.49
6	SPILLS AND UNPERMITTED DISCHARGES	18.49
7	INDUSTRIAL	1.50
8	ATMOSPHERIC DEPOSITION	.00
9	CONSTRUCTION	.00
10	RECREATION AND TOURISM (NON-BOATING)	.00

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National Assessed Waters
Individual Use Support for Great Lakes Open Water

Description of this table

EPA Designated Use		Total Square Miles Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
						% Threatened
						% Impaired
	Recreation	49,461.66	100.00	.00	.00
	Aquatic Life Harvesting	50,866.46	.81	.00	99.19

50,866.46 square miles of great lakes open water were assessed, or 84.01% of 60,546.00 total square miles.

National Assessed Waters
Water Quality Attainment for Great Lakes Open Water

Description of this table

Attainment Status	Square Miles	Percent of Assessed
Good	414.10	.81
Threatened	.00	.00
Impaired	50,452.36	99.19
Total Square Miles Assessed	50,866.46	100.00

Top Ten National Causes of Impairments
for Great Lakes Open Water

Description of this table

	Cause Name	Total Square Miles Impaired
1	PRIORITY ORGANICS	49,413.66
2	METALS	39,683.50
3	PESTICIDES	37,139.85
4	TOXIC ORGANICS	752.90
5	SUSPENDED SOLIDS	.00
6	SEDIMENT/SILTATION	.00
7	OTHER CAUSE	.00
8	HABITAT ALTERATIONS	.00
9	THERMAL MODIFICATIONS	.00
10	pH/ACIDITY/CAUSTIC CONDITIONS	.00

Top Ten National Sources of Impairments
for Great Lakes Open Water

Description of this table

	EPA Source Name	Total Square Miles Impaired by Source
1	ATMOSPHERIC DEPOSITION	49,243.56
2	INDUSTRIAL	40,297.94
3	LEGACY/HISTORICAL POLLUTANTS	40,127.84
4	AGRICULTURE	37,139.85
5	UNKNOWN	898.65
6	LAND APPLICATION/WASTE SITES	45.00
7	GROUNDWATER WITHDRAWALS	.00
8	SEWAGE	.00
9	CONSTRUCTION	.00
10	RECREATION AND TOURISM (NON-BOATING)	.00

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Impairments

National Causes of Impairment

Description of this table

EPA Impairment Name	Size of Assessed Waters with Listed Causes of Impairment
	Rivers, Streams, Creeks (Miles)	Lakes, Ponds, Reservoir (Acres)	Bays, Estuaries (Square Miles)	Coastal Shorelines (Miles)	Oceans, Near Coastal Waters (Square Miles)	Wetlands (Acres)	Great Lakes Shoreline (Miles)	Great Lakes Open Waters (Squar Miles)
HARMFUL ALGAL BLOOMS (HABs)	1,692.71	724,042.98	1,220.74	.00	.00	702.00	21.00	.00
CAUSE UNKNOWN	25,180.67	32,969.85	2,048.17	10.60	.00	.00	.00	.00
TASTE AND ODOR	890.68	23,307.17	2.20	.00	.00	.00	.00	.00
PRIORITY ORGANICS	1,815.50	122,856.00	.00	.00	.00	680.00	.00	49,413.66
METALS	52,809.48	2,827,608.22	4,939.58	157.82	3,949.33	565,475.71	60.72	39,683.50
PATHOGENS	82,132.98	466,012.97	2,141.23	274.50	4.81	29,443.50	87.83	.00
SUSPENDED SOLIDS	13,460.12	289,045.71	67.18	78.30	.00	.00	.00	.00
SEDIMENT/SILTATION	100,445.87	1,317,938.02	313.62	71.50	.16	247,268.00	.00	.00
OTHER CAUSE	7,754.47	54,625.70	262.07	20.01	.00	17,495.00	.00	.00
TOXIC ORGANICS	14,382.99	801,595.96	1,130.19	87.43	70.33	133.23	59.22	752.90
HABITAT ALTERATIONS	80,974.29	226,032.42	262.65	.00	.00	105,879.18	.00	.00
THERMAL MODIFICATIONS	51,738.32	407,213.78	14.94	14.00	.00	.00	.00	.00
pH/ACIDITY/CAUSTIC CONDITIONS	18,295.47	426,179.30	18.74	4.00	1.14	21,667.50	1.50	.00
MINERALIZATION	9,100.25	304,963.55	.00	.00	.00	7,680.00	.00	.00
NOXIOUS AQUATIC PLANTS	297.86	168,840.61	.00	.00	.00	.00	.00	.00
FLOW ALTERATIONS	48,925.16	592,360.99	305.68	.00	.00	54,451.19	.00	.00
TOXIC INORGANICS	11,551.76	425,053.35	142.60	40.00	.00	86,595.46	1.39	.00
TOTAL TOXICS	6,746.58	152,229.24	433.54	.60	.00	12,659.01	.00	.00
NUISANCE EXOTIC SPECIES	3,272.80	1,264,022.52	518.39	.00	.00	5,721.20	.00	.00
SALINITY/TDS/CHLORIDES	12,533.28	650,960.72	55.86	.00	.00	208,653.40	.00	.00
DIOXINS	2,004.00	10,754.10	155.23	108.10	70.33	.00	.00	.00
UNIONIZED AMMONIA	30.12	.00	.00	.00	.00	.00	.00	.00
BIOLOGIC INTEGRITY (BIOASSESSMENTS)	6,168.89	199,115.09	1,965.36	2.50	.14	26,484.00	.00	.00
ORGANIC ENRICHMENT/LOW DISSOLVED OXYGEN	51,549.52	1,339,070.42	2,214.03	43.30	16.20	282,753.30	.00	.00
OIL AND GREASE	3,133.65	177,615.40	61.55	22.40	.52	468.00	.00	.00
RADIATION	276.37	39,743.30	.00	.00	.00	2.41	.00	.00
NONPRIORITY ORGANICS	14.50	500.00	.00	.00	.00	.00	.00	.00
NUTRIENTS	52,227.56	2,864,710.69	2,229.23	99.90	1.83	79,741.34	.00	.00
FISH CONSUMPTION ADVIS.	2,809.32	173,839.99	200.40	.00	.00	.00	.00	.00
TURBIDITY	15,984.61	487,784.09	1,622.12	86.40	10.75	199,640.00	.00	.00
PESTICIDES	9,166.18	187,903.59	1,255.70	137.51	.00	421.11	.00	37,139.85
FISH KILLS	22.70	3,124.00	.00	.00	.00	.00	.00	.00

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Sources of Impairment

National Probable Sources Contributing to Impairment

Description of this table

EPA Source Name	Size of Assessed Waters with Probable Sources of Impairment
	Rivers, Streams, Creeks (Miles)	Lakes, Ponds, Reservoir (Acres)	Bays, Estuaries (Square Miles)	Coastal Shorelines (Miles)	Oceans, Near Coastal Waters (Square Miles)	Wetlands (Acres)	Great Lakes Shoreline (Miles)	Great Lakes Open Waters (Square Miles)
MUNICIPAL PERMITTED DISCHARGES (DIRECT AND INDIRECT)	32,438.24	823,510.09	3,444.97	50.60	1.86	78,339.30	.00	.00
HABITAT ALTERATIONS (NOT DIRECTLY RELATED TO HYDROMODIFICATION)	51,297.85	423,949.57	40.40	.00	.00	14,841.72	.00	.00
OTHER	8,491.00	1,295,104.21	2,139.01	34.49	.00	81,085.78	.00	.00
RESOURCE EXTRACTION	28,722.37	490,960.18	2,826.53	13.87	.00	62,887.40	.00	.00
COMMERCIAL HARBOR AND PORT ACTIVITIES	.00	87,895.84	470.23	20.42	.88	.00	.00	.00
UNKNOWN	91,823.72	2,743,374.10	5,235.23	139.06	70.33	556,502.88	64.22	898.65
INDUSTRIAL	17,405.02	532,877.67	4,905.69	131.56	.99	860.50	1.50	40,297.94
SILVICULTURE (FORESTRY)	18,463.23	252,060.74	1,035.22	2.00	.00	2.00	.00	.00
GROUNDWATER WITHDRAWALS	112.44	97,546.20	33.86	.00	.00	3,045.38	.00	.00
SEWAGE	7,989.75	103,802.18	471.62	50.26	.00	1.00	25.00	.00
ATMOSPHERIC DEPOSITION	15,007.72	1,829,672.24	2,580.14	20.01	3,949.33	394,880.00	.00	49,243.56
CONSTRUCTION	17,038.32	486,564.24	980.88	18.94	.14	12,979.29	.00	.00
RECREATION AND TOURISM (NON-BOATING)	3,014.21	144,231.44	98.37	20.01	3.54	787.39	.00	.00
AQUACULTURE	677.90	7,455.00	24.64	6.00	.00	.00	.00	.00
MILITARY BASES	95.64	2.25	5.91	.00	.00	.00	.00	.00
AGRICULTURE	113,662.70	2,093,641.13	808.78	116.54	1.14	228,178.63	.00	37,139.85
URBAN-RELATED RUNOFF/STORMWATER	38,114.89	948,420.23	2,742.70	230.69	2.23	79,582.43	21.00	.00
NATURAL	41,764.05	1,251,035.22	1,155.67	119.34	.30	149,317.95	.00	.00
SPILLS AND UNPERMITTED DISCHARGES	3,381.62	1,164,089.76	310.84	63.31	1.77	33.70	18.49	.00
LEGACY/HISTORICAL POLLUTANTS	4,187.67	562,676.09	829.24	11.87	.00	10.00	394.90	40,127.84
HYDROMODIFICATION	79,399.66	1,525,224.08	1,325.76	6.90	2.61	133,292.49	.00	.00
LAND APPLICATION/WASTE SITES	16,013.02	1,540,223.99	1,278.66	29.80	3.75	496.32	18.49	45.00
GROUNDWATER LOADINGS	1,187.56	17,022.06	127.41	.00	.00	.00	.00	.00
RECREATIONAL BOATING AND MARINAS	231.61	126,612.56	273.66	1.70	3.35	.00	.00	.00

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State URL for Water Quality
Hardcopy 305(b) Summary Report

Description of this table

State 305(b) Report	State 305(b) URL	State Water Program URL
EPA Region 1
CT	CT State URL	CT State Water Quality URL
MA	MA State URL	MA State Water Quality URL
ME	ME State URL	ME State Water Quality URL
NH	NH State URL	NH State Water Quality URL
RI	RI State URL	RI State Water Quality URL
VT	VT State URL	VT State Water Quality URL
EPA Region 2
NJ	NJ State URL	NJ State Water Quality URL
NY	NY State URL	NY State Water Quality URL
PR	PR State URL	PR State Water Quality URL
EPA Region 3
DC	DC State URL	DC State Water Quality URL
DE	DE State URL	DE State Water Quality URL
MD	MD State URL	MD State Water Quality URL
PA	PA State URL	PA State Water Quality URL
VA	VA State URL	VA State Water Quality URL
WV	WV State URL	WV State Water Quality URL
EPA Region 4
AL	AL State URL	AL State Water Quality URL
FL	FL State URL	FL State Water Quality URL
GA	GA State URL	GA State Water Quality URL
KY	KY State URL	KY State Water Quality URL
MS	MS State URL	MS State Water Quality URL
NC	NC State URL	NC State Water Quality URL
SC	SC State URL	SC State Water Quality URL
TN	TN State URL	TN State Water Quality URL
EPA Region 5
IL	IL State URL	IL State Water Quality URL
IN	IN State URL	IN State Water Quality URL
MI	MI State URL	MI State Water Quality URL
MN	MN State URL	MN State Water Quality URL
OH	OH State URL	OH State Water Quality URL
WI	WI State URL	WI State Water Quality URL
EPA Region 6
AR	AR State URL	AR State Water Quality URL
LA	LA State URL	LA State Water Quality URL
NM	NM State URL	NM State Water Quality URL
OK	OK State URL	OK State Water Quality URL
TX	TX State URL	TX State Water Quality URL
EPA Region 7
IA	IA State URL	IA State Water Quality URL
KS	KS State URL	KS State Water Quality URL
MO	MO State URL	MO State Water Quality URL
NE	NE State URL	NE State Water Quality URL
EPA Region 8
CO	CO State URL	CO State Water Quality URL
MT	MT State URL	MT State Water Quality URL
ND	ND State URL	ND State Water Quality URL
SD	SD State URL	SD State Water Quality URL
UT	UT State URL	UT State Water Quality URL
WY	WY State URL	WY State Water Quality URL
EPA Region 09
EPA Region 9
AZ	AZ State URL	AZ State Water Quality URL
CA	CA State URL	CA State Water Quality URL
HI	HI State URL	HI State Water Quality URL
NV	NV State URL	NV State Water Quality URL
EPA Region 10
AK	AK State URL	AK State Water Quality URL
ID	ID State URL	ID State Water Quality URL
OR	OR State URL	OR State Water Quality URL
WA	WA State URL	WA State Water Quality URL

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