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Region 7 Summary of State Information

Map of the Region 7 Connecticut Maine Massachusetts New Hampshire Rhode Island Vermont New Jersey New York Puerto Rico U.S. Virgin Islands Delaware District of Columbia Maryland Pennsylvania Virginia West Virginia Alabama Florida Georgia Kentucky Mississippi North Carolina South Carolina Tennessee Illinois Indiana Michigan Minnesota Ohio Wisconsin Arkansas Louisiana New Mexico Oklahoma Texas Iowa Kansas Missouri Nebraska Colorado Montana North Dakota South Dakota Utah Wyoming Arizona California Hawaii Nevada Alaska Idaho Oregon Washington

Depicted below are regional summary tables and charts for available water quality data reported by the States to EPA under Section 305(b) and 303(d) of the Clean Water Act.

This report displays the most current available reporting year data.
Check the Status of Available Data for more information.


Frequent Questions


Assessed Waters of Region 7

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

Description of this table
  Size of Water
Rivers and
Streams (Miles)		 Lakes, Reservoirs,
and Ponds (Acres)		 Wetlands
(Acres)
   Good Waters 22,440 377,282 18,233
   Threatened Waters 95
   Impaired Waters 38,471 396,379 18,341
Total Assessed Waters 60,910 773,757 36,574
Total Waters 339,554 964,041 160,762
Percent of Waters Assessed 17.9 80.3 22.8

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Summary of Water Quality Assessments for Each Waterbody Type


Region 7
Water Quality Attainment in Assessed Rivers and Streams

Description of this table
Assessed Status Miles
Assessed 60,910
Unassessed 278,644
Total Miles 339,554







arrow pointing right 		Description of this table
Attainment Status Miles
Good 22,440
Threatened 0
Impaired 38,471
Total Miles Assessed 60,910

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Region 7
Designated Use Support in Assessed Rivers and Streams*

No designated uses reported.

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Region 7
Causes of Impairment in Assessed Rivers and Streams

Description of this table
Cause of Impairment Group Miles
Threatened or
Impaired
Pathogens color.gif 16,201
Metals (other than Mercury) color.gif 13,216
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 11,172
Sediment color.gif 9,659
Organic Enrichment/Oxygen Depletion color.gif 9,450
Nutrients color.gif 9,205
Cause Unknown - Impaired Biota color.gif 5,433
Pesticides color.gif 4,433
Cause Unknown color.gif 2,517
pH/Acidity/Caustic Conditions color.gif 2,437
Ammonia color.gif 2,149
Habitat Alterations color.gif 1,848
Algal Growth color.gif 1,561
Temperature color.gif 1,230
Toxic Inorganics color.gif 1,169
Mercury color.gif 1,084
Polychlorinated Biphenyls (PCBs) color.gif 700
Flow Alteration(s) color.gif 460
Total Toxics color.gif 112
Turbidity color.gif 84
Other Cause color.gif 65
Chlorine color.gif 33
Toxic Organics color.gif 6
Radiation color.gif 5
Noxious Aquatic Plants color.gif 4
Taste, Color and Odor color.gif 0

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Region 7
Probable Sources of Impairments in Assessed Rivers and Streams

Description of this table
Probable Source Group Miles
Threatened or
Impaired
Unknown color.gif 7,758
Agriculture color.gif 4,278
Natural/Wildlife color.gif 2,934
Unspecified Nonpoint Source color.gif 2,246
Hydromodification color.gif 1,779
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 768
Municipal Dishcarges/Sewage color.gif 673
Atmospheric Deposition color.gif 509
Industrial color.gif 359
Spills/Dumping color.gif 263
Urban-Related Runoff/Stormwater color.gif 171
Resource Extraction color.gif 106
Recreation And Tourism (Non-Boating) color.gif 45
Other color.gif 43
Land Application/Waste Sites/Tanks color.gif 20

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Region 7
Water Quality Attainment in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Assessed Status Acres
Assessed 773,757
Unassessed 190,284
Total Acres 964,041







arrow pointing right 		Description of this table
Attainment Status Acres
Good 377,282
Threatened 95
Impaired 396,379
Total Acres Assessed 773,757

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Region 7
Designated Use Support in Assessed Lakes, Reservoirs, and Ponds*

No designated uses reported.

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Region 7
Causes of Impairment in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Cause of Impairment Group Acres
Threatened or
Impaired
Algal Growth color.gif 269,371
Sediment color.gif 144,125
Organic Enrichment/Oxygen Depletion color.gif 105,664
Nutrients color.gif 90,384
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 83,873
pH/Acidity/Caustic Conditions color.gif 52,070
Turbidity color.gif 38,173
Mercury color.gif 28,170
Pathogens color.gif 21,858
Metals (other than Mercury) color.gif 19,233
Noxious Aquatic Plants color.gif 18,715
Pesticides color.gif 18,175
Other Cause color.gif 4,949
Polychlorinated Biphenyls (PCBs) color.gif 3,887
Ammonia color.gif 3,212
Toxic Inorganics color.gif 2,844
Cause Unknown color.gif 1,694
Nuisance Exotic Species color.gif 338
Biotoxins color.gif 326
Oil and Grease color.gif 59

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Region 7
Probable Sources of Impairments in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Probable Source Group Acres
Threatened or
Impaired
Unknown color.gif 86,577
Unspecified Nonpoint Source color.gif 63,983
Natural/Wildlife color.gif 47,234
Hydromodification color.gif 39,803
Agriculture color.gif 31,444
Atmospheric Deposition color.gif 20,114
Urban-Related Runoff/Stormwater color.gif 1,802
Construction color.gif 562
Land Application/Waste Sites/Tanks color.gif 370
Resource Extraction color.gif 59
Other color.gif 59

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Region 7
Water Quality Attainment in Assessed Wetlands

Description of this table
Assessed Status Acres
Assessed 36,574
Unassessed 124,188
Total Acres 160,762







arrow pointing right 		Description of this table
Attainment Status Acres
Good 18,233
Threatened 0
Impaired 18,341
Total Acres Assessed 36,574

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Region 7
Designated Use Support in Assessed Wetlands*

No designated uses reported.

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Region 7
Causes of Impairment in Assessed Wetlands

Description of this table
Cause of Impairment Group Acres
Threatened or
Impaired
Sediment color.gif 13,376
Flow Alteration(s) color.gif 4,210
Nuisance Exotic Species color.gif 4,200
Nutrients color.gif 1,537
Algal Growth color.gif 1,067
Turbidity color.gif 965
Noxious Aquatic Plants color.gif 940
Cause Unknown color.gif 665
Organic Enrichment/Oxygen Depletion color.gif 391
Other Cause color.gif 371
Habitat Alterations color.gif 237
Ammonia color.gif 140

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Region 7
Probable Sources of Impairments in Assessed Wetlands

Description of this table
Probable Source Group Acres
Threatened or
Impaired
Natural/Wildlife color.gif 15,118
Agriculture color.gif 14,372
Hydromodification color.gif 12,619
Unknown color.gif 4,516
Other color.gif 237
Industrial color.gif 140

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Region 7 Causes of Impairment


Description of this table
NOTE: Click on a cause of impairment (e.g. algal growth) to see the specific state-reported causes that are grouped to make up this category.
Cause of Impairment Group Size of Assessed Waters with Listed Causes of Impairment
Rivers and
Streams (Miles)		 Lakes, Reservoirs,
and Ponds (Acres)		 Wetlands
(Acres)
Algal Growth 1,561 269,371 1,067
Ammonia 2,149 3,212 140
Biotoxins   326  
Cause Unknown 2,517 1,694 665
Cause Unknown - Impaired Biota 5,433    
Chlorine 33    
Flow Alteration(s) 460   4,210
Habitat Alterations 1,848   237
Mercury 1,084 28,170  
Metals (other than Mercury) 13,216 19,233  
Noxious Aquatic Plants 4 18,715 940
Nuisance Exotic Species   338 4,200
Nutrients 9,205 90,384 1,537
Oil and Grease   59  
Organic Enrichment/Oxygen Depletion 9,450 105,664 391
Other Cause 65 4,949 371
Pathogens 16,201 21,858  
Pesticides 4,433 18,175  
pH/Acidity/Caustic Conditions 2,437 52,070  
Polychlorinated Biphenyls (PCBs) 700 3,887  
Radiation 5    
Salinity/Total Dissolved Solids/Chlorides/Sulfates 11,172 83,873  
Sediment 9,659 144,125 13,376
Taste, Color and Odor 0    
Temperature 1,230    
Total Toxics 112    
Toxic Inorganics 1,169 2,844  
Toxic Organics 6    
Turbidity 84 38,173 965

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Region 7 Probable Sources Contributing to Impairments

Description of this table
NOTE: Click on a source of impairment (e.g. agriculture) to see the specific state-reported sources that are grouped to make up this category.
Probable Source Group Size of Assessed Waters with Probable Sources of Impairments
Rivers and
Streams (Miles)		 Lakes, Reservoirs,
and Ponds (Acres)		 Wetlands
(Acres)
Agriculture 4,278 31,444 14,372
Atmospheric Deposition 509 20,114  
Construction   562  
Habitat Alterations (Not Directly Related To Hydromodification) 768    
Hydromodification 1,779 39,803 12,619
Industrial 359   140
Land Application/Waste Sites/Tanks 20 370  
Municipal Dishcarges/Sewage 673    
Natural/Wildlife 2,934 47,234 15,118
Other 43 59 237
Recreation And Tourism (Non-Boating) 45    
Resource Extraction 106 59  
Spills/Dumping 263    
Unknown 7,758 86,577 4,516
Unspecified Nonpoint Source 2,246 63,983  
Urban-Related Runoff/Stormwater 171 1,802  

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Region 7 Previously Impaired Waters Now Attaining All Uses

Description of this table
NOTE: Click on the underlined "Number of Waters Attaining" value for a detailed list of those waters now attaining all uses.
Cycle Attaining Number of Waters Attaining Number of Causes of
Impairment Addressed
2003 color.gif 1 2
2007 color.gif 73 167
2008 color.gif 19 19
2009 color.gif 89 204

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Region 7
Impaired Waters Listed By State

Description of this table
State Name Number of Waters on 303(d) List
Iowa color.gif 278
Kansas color.gif 1,333
Missouri color.gif 174
Nebraska color.gif 177

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Region 7 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.
Pollutant Group Number of TMDLs Number of Causes of
Impairment Addressed
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 949 954
Pathogens color.gif 597 601
Metals (other than Mercury) color.gif 394 394
Organic Enrichment/Oxygen Depletion color.gif 381 383
Nutrients color.gif 232 240
Sediment color.gif 98 98
pH/Acidity/Caustic Conditions color.gif 86 86
Pesticides color.gif 85 85
Toxic Inorganics color.gif 82 82
Turbidity color.gif 65 66
Cause Unknown - Impaired Biota color.gif 32 32
Algal Growth color.gif 29 31
Ammonia color.gif 20 20
Noxious Aquatic Plants color.gif 11 12
Other Cause color.gif 8 8
Polychlorinated Biphenyls (PCBs) color.gif 7 7
Mercury color.gif 5 6
Temperature color.gif 5 5
Chlorine color.gif 4 4
Toxic Organics color.gif 1 1

Total: 3,091 TMDLs; 3,115 Causes of Impairment Addressed

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Region 7 Approved TMDLs By State

This chart includes TMDLs since October 1, 1995.

Description of this table
State Name Number of TMDLs
Iowa color.gif 136
Kansas color.gif 2,727
Missouri color.gif 137
Nebraska color.gif 91

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Region 7 Cumulative Number of TMDLs

EPA Fiscal Year starts October 1 and ends September 30.


Description of this table
NOTE: Click on the underlined "Number of TMDLs Completed" value for a detailed list of the TMDLs for the fiscal year.
Fiscal Year Number of TMDLs Number of Causes of
Impairment Addressed
2000 color.gif 586 589
2001 color.gif 344 345
2002 color.gif 203 204
2003 color.gif 188 191
2004 color.gif 503 503
2005 color.gif 649 650
2006 color.gif 224 227
2007 color.gif 160 162
2008 color.gif 185 190
2009 color.gif 49 54

Total: 3,091 TMDLs; 3,115 Causes of Impairment Addressed

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Status of Available Data Used in This Report

Description of this table
State Name Assessed Waters Report Year Impaired Waters Report Year
Iowa 2008 2006
Kansas 2008 2008
Missouri 2008 2006
Nebraska 2008 2008


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