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Region 1 Summary of State Information

Map of the Region 1 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 1

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)
   Good Waters 37,241 963,577 317 79  
   Threatened Waters
   Impaired Waters 14,075 558,629 712   70
Total Assessed Waters 51,316 1,522,206 1,029 79 70
Total Waters 78,714 1,654,535 3,873 79 70
Percent of Waters Assessed 65.2 92.0 26.6 99.5 100.0

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Summary of Water Quality Assessments for Each Waterbody Type


Region 1
Water Quality Attainment in Assessed Rivers and Streams

Description of this table
Assessed Status Miles
Assessed 51,316
Unassessed 27,398
Total Miles 78,714







arrow pointing right 		Description of this table
Attainment Status Miles
Good 37,241
Threatened 0
Impaired 14,075
Total Miles Assessed 51,316

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Region 1
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
Designated Use Group Miles Assessed Percent Good Percent Threatened Percent Impaired % Good
% Threatened
% Impaired
Aquatic Life Harvesting Aquatic Life Harvesting 9,628 .0 .0 100.0 color.gif
Public Water Supply Public Water Supply 9,628 100.0 .0 .0 color.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 4,565 23.5 .2 76.3 color.gifcolor.gifcolor.gif
Recreation Recreation 1,706 59.7 1.0 39.2 color.gifcolor.gifcolor.gif

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Region 1
Causes of Impairment in Assessed Rivers and Streams

Description of this table
Cause of Impairment Group Miles
Threatened or
Impaired
Mercury color.gif 9,732
Pathogens color.gif 3,037
pH/Acidity/Caustic Conditions color.gif 1,670
Organic Enrichment/Oxygen Depletion color.gif 1,278
Metals (other than Mercury) color.gif 942
Cause Unknown color.gif 787
Polychlorinated Biphenyls (PCBs) color.gif 727
Nutrients color.gif 694
Cause Unknown - Impaired Biota color.gif 534
Toxic Organics color.gif 414
Dioxins color.gif 408
Flow Alteration(s) color.gif 385
Turbidity color.gif 339
Habitat Alterations color.gif 304
Pesticides color.gif 239
Sediment color.gif 236
Noxious Aquatic Plants color.gif 197
Taste, Color and Odor color.gif 196
Total Toxics color.gif 182
Nuisance Exotic Species color.gif 151
Other Cause color.gif 134
Temperature color.gif 67
Ammonia color.gif 66
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 56
Oil and Grease color.gif 47
Algal Growth color.gif 32
Toxic Inorganics color.gif 6
Chlorine color.gif 4
Nuisance Native Species color.gif 2
Radiation color.gif 1

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Region 1
Probable Sources of Impairments in Assessed Rivers and Streams

Description of this table
Probable Source Group Miles
Threatened or
Impaired
Atmospheric Deposition color.gif 9,639
Unknown color.gif 3,016
Municipal Dishcarges/Sewage color.gif 524
Agriculture color.gif 422
Urban-Related Runoff/Stormwater color.gif 385
Hydromodification color.gif 276
Industrial color.gif 231
Other color.gif 193
Unspecified Nonpoint Source color.gif 98
Land Application/Waste Sites/Tanks color.gif 90
Legacy/Historical Pollutants color.gif 71
Natural/Wildlife color.gif 64
Spills/Dumping color.gif 55
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 48
Construction color.gif 39
Resource Extraction color.gif 34
Recreation And Tourism (Non-Boating) color.gif 29
Groundwater Loadings/Withdrawals color.gif 28
Aquaculture color.gif 9
Silviculture (Forestry) color.gif 1

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Region 1
Water Quality Attainment in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Assessed Status Acres
Assessed 1,522,206
Unassessed 132,329
Total Acres 1,654,535







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Attainment Status Acres
Good 963,577
Threatened 0
Impaired 558,629
Total Acres Assessed 1,522,206

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Region 1
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
Designated Use Group Acres Assessed Percent Good Percent Threatened Percent Impaired % Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 204,958 9.9 .0 90.1 color.gifcolor.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 185,878 .0 .0 100.0 color.gif
Public Water Supply Public Water Supply 185,878 100.0 .0 .0 color.gif
Recreation Recreation 131,971 92.0 .0 7.9 color.gifcolor.gifcolor.gif

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Region 1
Causes of Impairment in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Cause of Impairment Group Acres
Threatened or
Impaired
Mercury color.gif 371,293
Polychlorinated Biphenyls (PCBs) color.gif 181,541
Nutrients color.gif 180,699
Nuisance Exotic Species color.gif 130,220
pH/Acidity/Caustic Conditions color.gif 97,472
Metals (other than Mercury) color.gif 51,354
Cause Unknown - Impaired Biota color.gif 49,043
Turbidity color.gif 43,735
Organic Enrichment/Oxygen Depletion color.gif 27,789
Noxious Aquatic Plants color.gif 13,790
Flow Alteration(s) color.gif 8,051
Algal Growth color.gif 7,449
Pathogens color.gif 6,086
Biotoxins color.gif 5,821
Pesticides color.gif 2,731
Taste, Color and Odor color.gif 1,664
Trash color.gif 1,595
Toxic Organics color.gif 1,178
Sediment color.gif 443
Dioxins color.gif 384
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 228
Habitat Alterations color.gif 121
Cause Unknown color.gif 108
Other Cause color.gif 16
Ammonia color.gif 1

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Region 1
Probable Sources of Impairments in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Probable Source Group Acres
Threatened or
Impaired
Atmospheric Deposition color.gif 371,941
Spills/Dumping color.gif 163,921
Unspecified Nonpoint Source color.gif 135,291
Unknown color.gif 103,207
Natural/Wildlife color.gif 92,282
Municipal Dishcarges/Sewage color.gif 82,476
Hydromodification color.gif 72,384
Agriculture color.gif 59,392
Other color.gif 30,638
Urban-Related Runoff/Stormwater color.gif 23,055
Commercial Harbor And Port Activities color.gif 23,046
Recreational Boating And Marinas color.gif 17,942
Industrial color.gif 9,677
Legacy/Historical Pollutants color.gif 3,098
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 96
Resource Extraction color.gif 45
Land Application/Waste Sites/Tanks color.gif 30
Recreation And Tourism (Non-Boating) color.gif 20

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Region 1
Water Quality Attainment in Assessed Bays and Estuaries

Description of this table
Assessed Status Square Miles
Assessed 1,029
Unassessed 2,844
Total Square Miles 3,873







arrow pointing right 		Description of this table
Attainment Status Square Miles
Good 317
Threatened 0
Impaired 712
Total Square Miles Assessed 1,029

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Region 1
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
Designated Use Group Square Miles Assessed Percent Good Percent Threatened Percent Impaired % Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 251 10.2 .0 89.7 color.gifcolor.gifcolor.gif
Public Water Supply Public Water Supply 18 100.0 .0 .0 color.gif
Aquatic Life Harvesting Aquatic Life Harvesting 18 .0 .0 100.0 color.gif
Recreation Recreation 15 62.9 .0 37.1 color.gifcolor.gif

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Region 1
Causes of Impairment in Assessed Bays and Estuaries

Description of this table
Cause of Impairment Group Square Miles
Threatened or
Impaired
Pathogens color.gif 502
Organic Enrichment/Oxygen Depletion color.gif 379
Nutrients color.gif 368
Toxic Organics color.gif 65
Polychlorinated Biphenyls (PCBs) color.gif 36
Cause Unknown - Impaired Biota color.gif 24
Dioxins color.gif 19
Mercury color.gif 19
Temperature color.gif 14
Cause Unknown color.gif 14
Oil and Grease color.gif 12
Habitat Alterations color.gif 12
Metals (other than Mercury) color.gif 11
Noxious Aquatic Plants color.gif 8
Total Toxics color.gif 5
Turbidity color.gif 5
Sediment color.gif 4
Ammonia color.gif 3
Other Cause color.gif 3
Taste, Color and Odor color.gif 3
Algal Growth color.gif 1
Nuisance Exotic Species color.gif 1
Toxic Inorganics color.gif 0
Flow Alteration(s) color.gif 0
pH/Acidity/Caustic Conditions color.gif 0
Pesticides color.gif 0

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Region 1
Probable Sources of Impairments in Assessed Bays and Estuaries

Description of this table
Probable Source Group Square Miles
Threatened or
Impaired
Urban-Related Runoff/Stormwater color.gif 426
Municipal Dishcarges/Sewage color.gif 415
Unspecified Nonpoint Source color.gif 379
Atmospheric Deposition color.gif 309
Industrial color.gif 290
Recreational Boating And Marinas color.gif 244
Natural/Wildlife color.gif 235
Unknown color.gif 96
Legacy/Historical Pollutants color.gif 13
Land Application/Waste Sites/Tanks color.gif 10
Other color.gif 7
Agriculture color.gif 3
Hydromodification color.gif 1
Spills/Dumping color.gif 0
Resource Extraction color.gif 0

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Region 1
Water Quality Attainment in Assessed Coastal Shoreline

Description of this table
Assessed Status Miles
Assessed 79
Unassessed 0
Total Miles 79







arrow pointing right 		Description of this table
Attainment Status Miles
Good 79
Threatened 0
Impaired 0
Total Miles Assessed 79

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Region 1
Designated Use Support in Assessed Coastal Shoreline*

No designated uses reported.

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Region 1
Causes of Impairment in Assessed Coastal Shoreline

No causes of impairment reported.

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Region 1
Probable Sources of Impairments in Assessed Coastal Shoreline

No probable sources of impairments reported.

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Region 1
Water Quality Attainment in Assessed Ocean and Near Coastal

Description of this table
Assessed Status Square Miles
Assessed 70
Unassessed 0
Total Square Miles 70







arrow pointing right 		Description of this table
Attainment Status Square Miles
Good 0
Threatened 0
Impaired 70
Total Square Miles Assessed 70

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Region 1
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
Designated Use Group Square Miles Assessed Percent Good Percent Threatened Percent Impaired % Good
% Threatened
% Impaired
Aquatic Life Harvesting Aquatic Life Harvesting 70 .0 .0 100.0 color.gif
Public Water Supply Public Water Supply 70 100.0 .0 .0 color.gif
Recreation Recreation 4 13.1 .0 86.9 color.gifcolor.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 0 100.0 .0 .0 color.gif

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Region 1
Causes of Impairment in Assessed Ocean and Near Coastal

Description of this table
Cause of Impairment Group Square Miles
Threatened or
Impaired
Polychlorinated Biphenyls (PCBs) color.gif 70
Mercury color.gif 70
Dioxins color.gif 70
Pathogens color.gif 4

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Region 1
Probable Sources of Impairments in Assessed Ocean and Near Coastal

Description of this table
Probable Source Group Square Miles
Threatened or
Impaired
Unknown color.gif 70
Atmospheric Deposition color.gif 70
Hydromodification color.gif 2
Municipal Dishcarges/Sewage color.gif 2
Natural/Wildlife color.gif 0

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Region 1 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)		 Ocean and
Near Coastal
(Square Miles)
Algal Growth 32 7,449 1  
Ammonia 66 1 3  
Biotoxins   5,821    
Cause Unknown 787 108 14  
Cause Unknown - Impaired Biota 534 49,043 24  
Chlorine 4      
Dioxins 408 384 19 70
Flow Alteration(s) 385 8,051 0  
Habitat Alterations 304 121 12  
Mercury 9,732 371,293 19 70
Metals (other than Mercury) 942 51,354 11  
Noxious Aquatic Plants 197 13,790 8  
Nuisance Exotic Species 151 130,220 1  
Nuisance Native Species 2      
Nutrients 694 180,699 368  
Oil and Grease 47   12  
Organic Enrichment/Oxygen Depletion 1,278 27,789 379  
Other Cause 134 16 3  
Pathogens 3,037 6,086 502 4
Pesticides 239 2,731 0  
pH/Acidity/Caustic Conditions 1,670 97,472 0  
Polychlorinated Biphenyls (PCBs) 727 181,541 36 70
Radiation 1      
Salinity/Total Dissolved Solids/Chlorides/Sulfates 56 228    
Sediment 236 443 4  
Taste, Color and Odor 196 1,664 3  
Temperature 67   14  
Total Toxics 182   5  
Toxic Inorganics 6   0  
Toxic Organics 414 1,178 65  
Trash   1,595    
Turbidity 339 43,735 5  

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Region 1 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)		 Ocean and
Near Coastal
(Square Miles)
Agriculture 422 59,392 3  
Aquaculture 9      
Atmospheric Deposition 9,639 371,941 309 70
Commercial Harbor And Port Activities   23,046    
Construction 39      
Groundwater Loadings/Withdrawals 28      
Habitat Alterations (Not Directly Related To Hydromodification) 48 96    
Hydromodification 276 72,384 1 2
Industrial 231 9,677 290  
Land Application/Waste Sites/Tanks 90 30 10  
Legacy/Historical Pollutants 71 3,098 13  
Municipal Dishcarges/Sewage 524 82,476 415 2
Natural/Wildlife 64 92,282 235 0
Other 193 30,638 7  
Recreation And Tourism (Non-Boating) 29 20    
Recreational Boating And Marinas   17,942 244  
Resource Extraction 34 45 0  
Silviculture (Forestry) 1      
Spills/Dumping 55 163,921 0  
Unknown 3,016 103,207 96 70
Unspecified Nonpoint Source 98 135,291 379  
Urban-Related Runoff/Stormwater 385 23,055 426  

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Region 1 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 15 19
2006 color.gif 8 11
2007 color.gif 4 4
2008 color.gif 5 5

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Region 1
Impaired Waters Listed By State

Description of this table
State Name Number of Waters on 303(d) List
Connecticut color.gif 408
Maine color.gif 206
Massachusetts color.gif 837
New Hampshire color.gif 5,211
Rhode Island color.gif 141
Vermont color.gif 131

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Region 1 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
Mercury color.gif 5,252 5,252
Pathogens color.gif 532 533
pH/Acidity/Caustic Conditions color.gif 359 363
Nutrients color.gif 243 300
Other Cause color.gif 54 54
Metals (other than Mercury) color.gif 48 48
Organic Enrichment/Oxygen Depletion color.gif 11 14
Ammonia color.gif 10 11
Algal Growth color.gif 5 5
Turbidity color.gif 5 7
Chlorine color.gif 4 4
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 4 4
Toxic Organics color.gif 4 4
Sediment color.gif 3 3
Total Toxics color.gif 1 1

Total: 6,535 TMDLs; 6,603 Causes of Impairment Addressed

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Region 1 Approved TMDLs By State

This chart includes TMDLs since October 1, 1995.

Description of this table
State Name Number of TMDLs
Connecticut color.gif 109
Maine color.gif 292
Massachusetts color.gif 426
New Hampshire color.gif 5,510
Rhode Island color.gif 104
Vermont color.gif 94

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Region 1 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
1999 color.gif 3 5
2000 color.gif 28 31
2001 color.gif 29 29
2002 color.gif 122 139
2003 color.gif 86 89
2004 color.gif 92 95
2005 color.gif 73 81
2006 color.gif 81 91
2007 color.gif 226 238
2008 color.gif 5,454 5,463
2009 color.gif 340 340
2010 color.gif 1 2

Total: 6,535 TMDLs; 6,603 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
Connecticut 2008 2008
Maine 2008 2008
Massachusetts 2006 2006
New Hampshire 2006 2006
Rhode Island 2008 2008
Vermont 2008 2008


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