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Region 6 Summary of State Information

Map of the Region 6 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 6

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)		 Bays and
Estuaries
(Square Miles)		 Coastal
Shoreline
(Miles)		 Ocean and
Near Coastal
(Square Miles)		 Wetlands
(Acres)
   Good Waters 24,253 1,071,112 4,322     627,200
   Threatened Waters
   Impaired Waters 33,867 1,917,965 2,709 1 3,879 402,560
Total Assessed Waters 58,121 2,989,077 7,031 1 3,879 1,029,760
Total Waters 534,658 5,626,227 10,049 Unavailable Unavailable 7,784,200
Percent of Waters Assessed 10.9 53.1 70.0 Unavailable Unavailable 13.2

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Summary of Water Quality Assessments for Each Waterbody Type


Region 6
Water Quality Attainment in Assessed Rivers and Streams

Description of this table
Assessed Status Miles
Assessed 58,121
Unassessed 476,537
Total Miles 534,658







arrow pointing right 		Description of this table
Attainment Status Miles
Good 24,253
Threatened 0
Impaired 33,867
Total Miles Assessed 58,121

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Region 6
Designated Use Support in Assessed Rivers and Streams*

No designated uses reported.

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Region 6
Causes of Impairment in Assessed Rivers and Streams

Description of this table
Cause of Impairment Group Miles
Threatened or
Impaired
Pathogens color.gif 16,269
Organic Enrichment/Oxygen Depletion color.gif 10,856
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 8,560
Turbidity color.gif 6,929
Metals (other than Mercury) color.gif 4,563
Sediment color.gif 3,733
Mercury color.gif 2,907
Nutrients color.gif 2,409
pH/Acidity/Caustic Conditions color.gif 1,771
Pesticides color.gif 1,695
Temperature color.gif 1,237
Cause Unknown - Impaired Biota color.gif 1,220
Oil and Grease color.gif 549
Nuisance Exotic Species color.gif 493
Polychlorinated Biphenyls (PCBs) color.gif 435
Taste, Color and Odor color.gif 426
Ammonia color.gif 300
Dioxins color.gif 238
Flow Alteration(s) color.gif 194
Total Toxics color.gif 91
Algal Growth color.gif 86
Radiation color.gif 83
Toxic Inorganics color.gif 66
Toxic Organics color.gif 61
Chlorine color.gif 6

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Region 6
Probable Sources of Impairments in Assessed Rivers and Streams

Description of this table
Probable Source Group Miles
Threatened or
Impaired
Unknown color.gif 17,381
Agriculture color.gif 15,011
Natural/Wildlife color.gif 12,326
Municipal Dishcarges/Sewage color.gif 11,766
Urban-Related Runoff/Stormwater color.gif 8,500
Hydromodification color.gif 3,491
Resource Extraction color.gif 2,911
Atmospheric Deposition color.gif 2,878
Land Application/Waste Sites/Tanks color.gif 2,795
Other color.gif 1,698
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 1,501
Silviculture (Forestry) color.gif 1,373
Unspecified Nonpoint Source color.gif 1,045
Industrial color.gif 1,035
Spills/Dumping color.gif 829
Construction color.gif 608
Recreation And Tourism (Non-Boating) color.gif 590
Recreational Boating And Marinas color.gif 90
Legacy/Historical Pollutants color.gif 87
Aquaculture color.gif 52

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Region 6
Water Quality Attainment in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Assessed Status Acres
Assessed 2,989,077
Unassessed 2,637,150
Total Acres 5,626,227







arrow pointing right 		Description of this table
Attainment Status Acres
Good 1,071,112
Threatened 0
Impaired 1,917,965
Total Acres Assessed 2,989,077

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Region 6
Designated Use Support in Assessed Lakes, Reservoirs, and Ponds*

No designated uses reported.

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Region 6
Causes of Impairment in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Cause of Impairment Group Acres
Threatened or
Impaired
Mercury color.gif 717,799
Turbidity color.gif 626,642
Organic Enrichment/Oxygen Depletion color.gif 617,296
Nuisance Exotic Species color.gif 319,163
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 232,412
Sediment color.gif 158,213
pH/Acidity/Caustic Conditions color.gif 156,251
Taste, Color and Odor color.gif 95,493
Pesticides color.gif 89,633
Algal Growth color.gif 66,222
Pathogens color.gif 63,797
Nutrients color.gif 59,502
Polychlorinated Biphenyls (PCBs) color.gif 11,440
Metals (other than Mercury) color.gif 8,496
Ammonia color.gif 6,099
Cause Unknown - Impaired Biota color.gif 4,680
Temperature color.gif 1,933
Total Toxics color.gif 1,559
Toxic Organics color.gif 24
Oil and Grease color.gif 24
Dioxins color.gif 10

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Region 6
Probable Sources of Impairments in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Probable Source Group Acres
Threatened or
Impaired
Unknown color.gif 1,029,282
Other color.gif 342,797
Atmospheric Deposition color.gif 335,914
Natural/Wildlife color.gif 323,289
Agriculture color.gif 210,665
Hydromodification color.gif 94,284
Municipal Dishcarges/Sewage color.gif 34,540
Urban-Related Runoff/Stormwater color.gif 24,501
Land Application/Waste Sites/Tanks color.gif 12,895
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 4,284
Industrial color.gif 3,726
Spills/Dumping color.gif 3,636
Unspecified Nonpoint Source color.gif 2,710
Legacy/Historical Pollutants color.gif 2,578
Silviculture (Forestry) color.gif 1,822
Resource Extraction color.gif 1,369
Recreation And Tourism (Non-Boating) color.gif 140

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Region 6
Water Quality Attainment in Assessed Bays and Estuaries

Description of this table
Assessed Status Square Miles
Assessed 7,031
Unassessed 3,018
Total Square Miles 10,049







arrow pointing right 		Description of this table
Attainment Status Square Miles
Good 4,322
Threatened 0
Impaired 2,709
Total Square Miles Assessed 7,031

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Region 6
Designated Use Support in Assessed Bays and Estuaries*

No designated uses reported.

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Region 6
Causes of Impairment in Assessed Bays and Estuaries

Description of this table
Cause of Impairment Group Square Miles
Threatened or
Impaired
Mercury color.gif 1,659
Pathogens color.gif 1,218
Organic Enrichment/Oxygen Depletion color.gif 525
Turbidity color.gif 195
Nutrients color.gif 193
Sediment color.gif 193
Pesticides color.gif 187
Nuisance Exotic Species color.gif 91
Metals (other than Mercury) color.gif 29
Polychlorinated Biphenyls (PCBs) color.gif 29
Dioxins color.gif 29
Ammonia color.gif 6

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Region 6
Probable Sources of Impairments in Assessed Bays and Estuaries

Description of this table
Probable Source Group Square Miles
Threatened or
Impaired
Atmospheric Deposition color.gif 1,659
Unknown color.gif 1,615
Natural/Wildlife color.gif 702
Municipal Dishcarges/Sewage color.gif 649
Industrial color.gif 583
Agriculture color.gif 193
Other color.gif 135
Urban-Related Runoff/Stormwater color.gif 69
Recreational Boating And Marinas color.gif 55
Hydromodification color.gif 2

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Region 6
Water Quality Attainment in Assessed Coastal Shoreline

Description of this table
Pie chart not displayed because total size for Coastal Shoreline is unavailable.
Assessed Status Miles
Assessed 1
Unassessed Unavailable
Total Miles Unavailable







arrow pointing right 		Description of this table
Attainment Status Miles
Good 0
Threatened 0
Impaired 1
Total Miles Assessed 1

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Region 6
Designated Use Support in Assessed Coastal Shoreline*

No designated uses reported.

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Region 6
Causes of Impairment in Assessed Coastal Shoreline

Description of this table
Cause of Impairment Group Miles
Threatened or
Impaired
Pathogens color.gif 1

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Region 6
Probable Sources of Impairments in Assessed Coastal Shoreline

Description of this table
Probable Source Group Miles
Threatened or
Impaired
Unknown color.gif 1

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Region 6
Water Quality Attainment in Assessed Ocean and Near Coastal

Description of this table
Pie chart not displayed because total size for Ocean and Near Coastal is unavailable.
Assessed Status Square Miles
Assessed 3,879
Unassessed Unavailable
Total Square Miles Unavailable







arrow pointing right 		Description of this table
Attainment Status Square Miles
Good 0
Threatened 0
Impaired 3,879
Total Square Miles Assessed 3,879

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Region 6
Designated Use Support in Assessed Ocean and Near Coastal*

No designated uses reported.

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Region 6
Causes of Impairment in Assessed Ocean and Near Coastal

Description of this table
Cause of Impairment Group Square Miles
Threatened or
Impaired
Mercury color.gif 3,879

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Region 6
Probable Sources of Impairments in Assessed Ocean and Near Coastal

No probable sources of impairments reported.

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Region 6
Water Quality Attainment in Assessed Wetlands

Description of this table
Assessed Status Acres
Assessed 1,029,760
Unassessed 6,754,440
Total Acres 7,784,200







arrow pointing right 		Description of this table
Attainment Status Acres
Good 627,200
Threatened 0
Impaired 402,560
Total Acres Assessed 1,029,760

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Region 6
Designated Use Support in Assessed Wetlands*

No designated uses reported.

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Region 6
Causes of Impairment in Assessed Wetlands

Description of this table
Cause of Impairment Group Acres
Threatened or
Impaired
Organic Enrichment/Oxygen Depletion color.gif 394,880
Mercury color.gif 199,040
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 7,680
Temperature color.gif 7,680

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Region 6
Probable Sources of Impairments in Assessed Wetlands

Description of this table
Probable Source Group Acres
Threatened or
Impaired
Atmospheric Deposition color.gif 199,040
Unknown color.gif 199,040
Industrial color.gif 195,840
Agriculture color.gif 195,840
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 7,680
Hydromodification color.gif 7,680

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Region 6 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)		 Bays and
Estuaries
(Square Miles)		 Coastal
Shoreline
(Miles)		 Ocean and
Near Coastal
(Square Miles)		 Wetlands
(Acres)
Algal Growth 86 66,222        
Ammonia 300 6,099 6      
Cause Unknown - Impaired Biota 1,220 4,680        
Chlorine 6          
Dioxins 238 10 29      
Flow Alteration(s) 194          
Mercury 2,907 717,799 1,659   3,879 199,040
Metals (other than Mercury) 4,563 8,496 29      
Nuisance Exotic Species 493 319,163 91      
Nutrients 2,409 59,502 193      
Oil and Grease 549 24        
Organic Enrichment/Oxygen Depletion 10,856 617,296 525     394,880
Pathogens 16,269 63,797 1,218 1    
Pesticides 1,695 89,633 187      
pH/Acidity/Caustic Conditions 1,771 156,251        
Polychlorinated Biphenyls (PCBs) 435 11,440 29      
Radiation 83          
Salinity/Total Dissolved Solids/Chlorides/Sulfates 8,560 232,412       7,680
Sediment 3,733 158,213 193      
Taste, Color and Odor 426 95,493        
Temperature 1,237 1,933       7,680
Total Toxics 91 1,559        
Toxic Inorganics 66          
Toxic Organics 61 24        
Turbidity 6,929 626,642 195      

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Region 6 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)		 Bays and
Estuaries
(Square Miles)		 Coastal
Shoreline
(Miles)		 Wetlands
(Acres)
Agriculture 15,011 210,665 193   195,840
Aquaculture 52        
Atmospheric Deposition 2,878 335,914 1,659   199,040
Construction 608        
Habitat Alterations (Not Directly Related To Hydromodification) 1,501 4,284     7,680
Hydromodification 3,491 94,284 2   7,680
Industrial 1,035 3,726 583   195,840
Land Application/Waste Sites/Tanks 2,795 12,895      
Legacy/Historical Pollutants 87 2,578      
Municipal Dishcarges/Sewage 11,766 34,540 649    
Natural/Wildlife 12,326 323,289 702    
Other 1,698 342,797 135    
Recreation And Tourism (Non-Boating) 590 140      
Recreational Boating And Marinas 90   55    
Resource Extraction 2,911 1,369      
Silviculture (Forestry) 1,373 1,822      
Spills/Dumping 829 3,636      
Unknown 17,381 1,029,282 1,615 1 199,040
Unspecified Nonpoint Source 1,045 2,710      
Urban-Related Runoff/Stormwater 8,500 24,501 69    

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Region 6 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
2004 color.gif 1 1
2005 color.gif 48 87
2006 color.gif 1 3
2007 color.gif 4 12
2008 color.gif 22 22

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Region 6
Impaired Waters Listed By State

Description of this table
State Name Number of Waters on 303(d) List
Arkansas color.gif 224
Louisiana color.gif 250
New Mexico color.gif 187
Oklahoma color.gif 743
Texas color.gif 651

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Region 6 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
Pathogens color.gif 422 422
Organic Enrichment/Oxygen Depletion color.gif 228 228
Turbidity color.gif 202 202
Nutrients color.gif 150 150
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 101 101
Mercury color.gif 88 88
Pesticides color.gif 76 76
Metals (other than Mercury) color.gif 72 72
Temperature color.gif 50 50
Sediment color.gif 45 46
Ammonia color.gif 29 29
Toxic Organics color.gif 9 9
Polychlorinated Biphenyls (PCBs) color.gif 7 7
Algal Growth color.gif 4 4
Chlorine color.gif 3 3
Dioxins color.gif 3 3
Noxious Aquatic Plants color.gif 3 3
Toxic Inorganics color.gif 3 3
pH/Acidity/Caustic Conditions color.gif 2 2
Total Toxics color.gif 1 1

Total: 1,498 TMDLs; 1,499 Causes of Impairment Addressed

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Region 6 Approved TMDLs By State

This chart includes TMDLs since October 1, 1995.

Description of this table
State Name Number of TMDLs
Arkansas color.gif 232
Louisiana color.gif 665
New Mexico color.gif 224
Oklahoma color.gif 223
Texas color.gif 154

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Region 6 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
1998 color.gif 6 6
1999 color.gif 19 19
2000 color.gif 73 73
2001 color.gif 170 170
2002 color.gif 231 231
2003 color.gif 99 99
2004 color.gif 70 70
2005 color.gif 66 66
2006 color.gif 114 114
2007 color.gif 294 295
2008 color.gif 170 170
2009 color.gif 186 186

Total: 1,498 TMDLs; 1,499 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
Arkansas 2008 2008
Louisiana 2008 2006
New Mexico 2008 2008
Oklahoma 2008 2008
Texas 2008 2008


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