Region 1 Summary of State Information

Map of EPA Region 1 Connecticut Maine Massachusetts New Hampshire Rhode Island Vermont

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.





Assessed Waters of Region 1

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

Description of this table
 
    38,964 970,529 317 79 395
   
    21,998 569,632 957   399
60,962 1,540,161 1,274 79 794
86,384 1,644,437 3,966 79 Unavailable
70.6 93.7 32.1 100.0 Unavailable

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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

All
Rivers and Streams

86,384.3 Miles of Rivers and Streams

Assessed 60,962
Unassessed 25,423
Total Miles 86,384







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Description of this table

Assessed
Rivers and Streams

60,961.5 Miles of
Assessed Rivers and Streams

Good 38,964
Threatened 0
Impaired 21,998
Total Miles Assessed 60,962

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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
% Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 44,511 84.3 .0 15.7 color.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 32,591 43.6 .0 56.4 color.gifcolor.gif
Agricultural Agricultural 29,044 100.0 .0 .0 color.gif
Public Water Supply Public Water Supply 22,463 100.0 .0 .0 color.gifcolor.gif
Recreation Recreation 16,812 74.8 .0 25.2 color.gifcolor.gif
Aesthetic Value Aesthetic Value 6,494 88.0 .0 12.0 color.gifcolor.gif
Hydropower Generation Other 5,558 99.9 .0 .1 color.gifcolor.gif
Industrial Industrial 1,769 100.0 .0 .0 color.gif

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Region 1
Causes of Impairment in Assessed Rivers and Streams

Description of this table
Mercury color.gif 17,242
Pathogens color.gif 3,983
pH/Acidity/Caustic Conditions color.gif 3,504
Organic Enrichment/Oxygen Depletion color.gif 1,580
Cause Unknown - Impaired Biota color.gif 1,357
Polychlorinated Biphenyls (PCBs) color.gif 977
Metals (other than Mercury) color.gif 835
Nutrients color.gif 823
Flow Alteration(s) color.gif 673
Nuisance Exotic Species color.gif 422
Dioxins color.gif 405
Cause Unknown color.gif 387
Algal Growth color.gif 372
Pesticides color.gif 365
Habitat Alterations color.gif 359
Turbidity color.gif 321
Other Cause color.gif 210
Sediment color.gif 206
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 148
Taste, Color and Odor color.gif 139
Trash color.gif 138
Total Toxics color.gif 113
Noxious Aquatic Plants color.gif 112
Temperature color.gif 71
Ammonia color.gif 47
Toxic Organics color.gif 23
Oil and Grease color.gif 17
Cause Unknown - Fish Kills color.gif 7
Chlorine color.gif 2
Toxic Inorganics color.gif 2
Nuisance Native Species color.gif 2

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Region 1
Probable Sources of Impairments in Assessed Rivers and Streams

Description of this table
Atmospheric Deposition color.gif 17,022
Unknown color.gif 7,077
Municipal Discharges/Sewage color.gif 1,510
Urban-Related Runoff/Stormwater color.gif 1,474
Hydromodification color.gif 835
Agriculture color.gif 797
Industrial color.gif 667
Other color.gif 591
Unspecified Nonpoint Source color.gif 475
Natural/Wildlife color.gif 472
Legacy/Historical Pollutants color.gif 345
Land Application/Waste Sites/Tanks color.gif 216
Spills/Dumping color.gif 182
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 159
Construction color.gif 62
Resource Extraction color.gif 49
Recreation And Tourism (Non-Boating) color.gif 42
Aquaculture color.gif 25
Groundwater Loadings/Withdrawals color.gif 24

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

Description of this table

All
Lakes, Reservoirs, and Ponds

1,644,436.5 Acres of Lakes, Reservoirs, and Ponds

Assessed 1,540,161
Unassessed 104,275
Total Acres 1,644,437







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Description of this table

Assessed
Lakes, Reservoirs, and Ponds

1,540,161.4 Acres of
Assessed Lakes, Reservoirs, and Ponds

Good 970,529
Threatened 0
Impaired 569,632
Total Acres Assessed 1,540,161

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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
% Good
% Threatened
% Impaired
Aquatic Life Harvesting Aquatic Life Harvesting 1,496,474 71.3 .0 28.7 color.gifcolor.gif
Recreation Recreation 1,445,224 84.6 .0 15.4 color.gifcolor.gif
Public Water Supply Public Water Supply 1,350,030 98.9 .0 1.1 color.gifcolor.gif
Agricultural Agricultural 992,495 100.0 .0 .0 color.gif
Hydropower Generation Other 992,495 100.0 .0 .0 color.gif
Industrial Industrial 992,495 100.0 .0 .0 color.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 866,973 59.6 .0 40.4 color.gifcolor.gif
Aesthetic Value Aesthetic Value 279,892 40.4 .0 59.6 color.gifcolor.gif

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

Description of this table
Mercury color.gif 423,525
Nutrients color.gif 202,364
Polychlorinated Biphenyls (PCBs) color.gif 170,337
Nuisance Exotic Species color.gif 166,675
pH/Acidity/Caustic Conditions color.gif 143,540
Turbidity color.gif 54,703
Organic Enrichment/Oxygen Depletion color.gif 53,605
Cause Unknown - Impaired Biota color.gif 49,046
Algal Growth color.gif 25,254
Biotoxins color.gif 17,625
Flow Alteration(s) color.gif 8,038
Noxious Aquatic Plants color.gif 7,379
Pathogens color.gif 7,336
Metals (other than Mercury) color.gif 2,652
Pesticides color.gif 2,423
Taste, Color and Odor color.gif 1,686
Trash color.gif 1,611
Sediment color.gif 1,294
Dioxins color.gif 993
Toxic Organics color.gif 768
Habitat Alterations color.gif 324
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 275
Total Toxics color.gif 189
Toxic Inorganics color.gif 93
Radiation color.gif 48
Ammonia color.gif 23

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

Description of this table
Atmospheric Deposition color.gif 419,849
Spills/Dumping color.gif 166,481
Unknown color.gif 142,196
Unspecified Nonpoint Source color.gif 141,796
Natural/Wildlife color.gif 112,255
Other color.gif 92,652
Hydromodification color.gif 74,393
Agriculture color.gif 59,052
Urban-Related Runoff/Stormwater color.gif 32,286
Recreational Boating And Marinas color.gif 27,793
Municipal Discharges/Sewage color.gif 24,368
Industrial color.gif 9,615
Legacy/Historical Pollutants color.gif 4,313
Construction color.gif 4,206
Groundwater Loadings/Withdrawals color.gif 299
Military Bases color.gif 203
Land Application/Waste Sites/Tanks color.gif 161
Aquaculture color.gif 130
Recreation And Tourism (Non-Boating) color.gif 111
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 96
Resource Extraction color.gif 45

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Region 1
Water Quality Attainment in Assessed Bays and Estuaries

Description of this table

All
Bays and Estuaries

3,966.1 Square Miles of Bays and Estuaries

Assessed 1,274
Unassessed 2,693
Total Square Miles 3,966







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Description of this table

Assessed
Bays and Estuaries

1,273.5 Square Miles of
Assessed Bays and Estuaries

Good 317
Threatened 0
Impaired 957
Total Square Miles Assessed 1,274

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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
% Good
% Threatened
% Impaired
Aquatic Life Harvesting Aquatic Life Harvesting 1,264 43.0 .0 57.0 color.gifcolor.gif
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 921 49.9 .0 50.1 color.gifcolor.gif
Recreation Recreation 470 84.5 .0 15.5 color.gifcolor.gif
Public Water Supply Public Water Supply 99 100.0 .0 .0 color.gif
Aesthetic Value Aesthetic Value 66 77.5 .0 22.5 color.gifcolor.gif

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Region 1
Causes of Impairment in Assessed Bays and Estuaries

Description of this table
Pathogens color.gif 651
Nutrients color.gif 392
Organic Enrichment/Oxygen Depletion color.gif 377
Polychlorinated Biphenyls (PCBs) color.gif 193
Dioxins color.gif 101
Mercury color.gif 101
Cause Unknown - Impaired Biota color.gif 86
Other Cause color.gif 55
Turbidity color.gif 18
Temperature color.gif 14
Oil and Grease color.gif 12
Cause Unknown color.gif 11
pH/Acidity/Caustic Conditions color.gif 9
Algal Growth color.gif 7
Metals (other than Mercury) color.gif 5
Total Toxics color.gif 4
Trash color.gif 3
Taste, Color and Odor color.gif 3
Toxic Organics color.gif 3
Pesticides color.gif 2
Ammonia color.gif 1
Flow Alteration(s) color.gif 1
Habitat Alterations color.gif 1
Nuisance Exotic Species color.gif 1

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Region 1
Probable Sources of Impairments in Assessed Bays and Estuaries

Description of this table
Urban-Related Runoff/Stormwater color.gif 729
Municipal Discharges/Sewage color.gif 696
Unspecified Nonpoint Source color.gif 534
Atmospheric Deposition color.gif 391
Unknown color.gif 318
Industrial color.gif 298
Natural/Wildlife color.gif 264
Recreational Boating And Marinas color.gif 256
Legacy/Historical Pollutants color.gif 73
Other color.gif 55
Land Application/Waste Sites/Tanks color.gif 51
Agriculture color.gif 16
Hydromodification color.gif 8
Recreation And Tourism (Non-Boating) color.gif 7
Land Application/Waste Sites color.gif 1
Spills/Dumping color.gif 1
Resource Extraction color.gif 1
Commercial Harbor And Port Activities color.gif 0
Aquaculture color.gif 0

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Region 1
Water Quality Attainment in Assessed Coastal Shoreline

Description of this table

All
Coastal Shoreline

78.6 Miles of Coastal Shoreline

Assessed 79
Unassessed 0
Total Miles 79







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Description of this table

Assessed
Coastal Shoreline

78.6 Miles of
Assessed Coastal Shoreline

Good 79
Threatened 0
Impaired 0
Total Miles Assessed 79

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Region 1
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
Recreation Recreation 79 100.0 .0 .0 color.gif
Aquatic Life Harvesting Aquatic Life Harvesting 79 100.0 .0 .0 color.gif

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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 Wetlands

Description of this table
Pie chart not displayed because total size for Wetlands is unavailable.
Assessed 794
Unassessed Unavailable
Total Acres Unavailable







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Description of this table

Assessed
Wetlands

793.5 Acres of
Assessed Wetlands

Good 395
Threatened 0
Impaired 399
Total Acres Assessed 794

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Region 1
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 669 59.1 .0 40.9 color.gifcolor.gif
Agricultural Agricultural 669 100.0 .0 .0 color.gif
Aquatic Life Harvesting Aquatic Life Harvesting 399 15.4 .0 84.6 color.gifcolor.gif
Hydropower Generation Other 274 100.0 .0 .0 color.gif
Industrial Industrial 274 100.0 .0 .0 color.gif
Public Water Supply Public Water Supply 274 100.0 .0 .0 color.gif
Recreation Recreation 268 100.0 .0 .0 color.gif

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Region 1
Causes of Impairment in Assessed Wetlands

Description of this table
Cause Unknown - Impaired Biota color.gif 274
Dioxins color.gif 212
Toxic Organics color.gif 212
Polychlorinated Biphenyls (PCBs) color.gif 212
Pesticides color.gif 125

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Region 1
Probable Sources of Impairments in Assessed Wetlands

Description of this table
Unknown color.gif 214
Legacy/Historical Pollutants color.gif 212
Industrial color.gif 212
Agriculture color.gif 125
Urban-Related Runoff/Stormwater color.gif 54
Unspecified Nonpoint Source color.gif 35
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 33
Spills/Dumping color.gif 6

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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. See also Pollution categories summary document (PDF) (20 pp, 557 K, About PDF) for brief, non-technical descriptions of general cause categories.
Size of Assessed Waters with Listed Causes of Impairment
Algal Growth 372 25,254 7  
Ammonia 47 23 1  
Biotoxins   17,625    
Cause Unknown 387   11  
Cause Unknown - Fish Kills 7      
Cause Unknown - Impaired Biota 1,357 49,046 86 274
Chlorine 2      
Dioxins 405 993 101 212
Flow Alteration(s) 673 8,038 1  
Habitat Alterations 359 324 1  
Mercury 17,242 423,525 101  
Metals (other than Mercury) 835 2,652 5  
Noxious Aquatic Plants 112 7,379    
Nuisance Exotic Species 422 166,675 1  
Nuisance Native Species 2      
Nutrients 823 202,364 392  
Oil and Grease 17   12  
Organic Enrichment/Oxygen Depletion 1,580 53,605 377  
Other Cause 210   55  
Pathogens 3,983 7,336 651  
Pesticides 365 2,423 2 125
pH/Acidity/Caustic Conditions 3,504 143,540 9  
Polychlorinated Biphenyls (PCBs) 977 170,337 193 212
Radiation   48    
Salinity/Total Dissolved Solids/Chlorides/Sulfates 148 275    
Sediment 206 1,294    
Taste, Color and Odor 139 1,686 3  
Temperature 71   14  
Total Toxics 113 189 4  
Toxic Inorganics 2 93    
Toxic Organics 23 768 3 212
Trash 138 1,611 3  
Turbidity 321 54,703 18  

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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.
Size of Assessed Waters with Probable Sources of Impairments
Agriculture 797 59,052 16 125
Aquaculture 25 130 0  
Atmospheric Deposition 17,022 419,849 391  
Commercial Harbor And Port Activities     0  
Construction 62 4,206    
Groundwater Loadings/Withdrawals 24 299    
Habitat Alterations (Not Directly Related To Hydromodification) 159 96   33
Hydromodification 835 74,393 8  
Industrial 667 9,615 298 212
Land Application/Waste Sites     1  
Land Application/Waste Sites/Tanks 216 161 51  
Legacy/Historical Pollutants 345 4,313 73 212
Military Bases   203    
Municipal Discharges/Sewage 1,510 24,368 696  
Natural/Wildlife 472 112,255 264  
Other 591 92,652 55  
Recreation And Tourism (Non-Boating) 42 111 7  
Recreational Boating And Marinas   27,793 256  
Resource Extraction 49 45 1  
Spills/Dumping 182 166,481 1 6
Unknown 7,077 142,196 318 214
Unspecified Nonpoint Source 475 141,796 534 35
Urban-Related Runoff/Stormwater 1,474 32,286 729 54

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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.
2004 color.gif 15 23
2006 color.gif 8 14
2007 color.gif 4 4
2008 color.gif 5 5
2011 color.gif 24 29
2012 color.gif 4 5
2013 color.gif 19 29
2014 color.gif 6 10
2015 color.gif 13 13

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Region 1
Impaired Waters Listed By State

Description of this table
Connecticut color.gif 286
Maine color.gif 113
Massachusetts color.gif 720
New Hampshire color.gif 1,449
Rhode Island color.gif 121
Vermont color.gif 101

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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.
Mercury color.gif 5,283 5,283
Pathogens color.gif 1,557 1,559
pH/Acidity/Caustic Conditions color.gif 375 378
Nutrients color.gif 326 484
Other Cause color.gif 89 121
Metals (other than Mercury) color.gif 66 66
Organic Enrichment/Oxygen Depletion color.gif 12 17
Ammonia color.gif 10 11
Algal Growth color.gif 5 5
Sediment color.gif 5 7
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
Pesticides color.gif 2 2
Total Toxics color.gif 1 1

Total: 7,748 TMDLs; 7,953 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
Connecticut color.gif 407
Maine color.gif 341
Massachusetts color.gif 609
New Hampshire color.gif 6,055
Rhode Island color.gif 217
Vermont color.gif 119

Total: 7,748 TMDLs

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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.
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 93 96
2005 color.gif 73 81
2006 color.gif 74 83
2007 color.gif 226 238
2008 color.gif 5,465 5,474
2009 color.gif 340 340
2010 color.gif 439 457
2011 color.gif 253 331
2012 color.gif 264 296
2013 color.gif 148 148
2014 color.gif 77 85
2015 color.gif 25 28
2016 color.gif 3 3

Total: 7,748 TMDLs; 7,953 Causes of Impairment Addressed

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Status of Available Data Used in This Report

Description of this table
Connecticut 2014 2014
Maine 2012 2012
Massachusetts 2012 2012
New Hampshire 2010 2010
Rhode Island 2014 2014
Vermont 2014 2014


TMDL Document Search


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