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On This Page 303(d) Listed Waters for 2010

Data are also available for these cycles:
2002 2004 2006 2008

Waterbody Changes from Prior Cycle

For More Information:

New Hampshire Assessment Report Exit EPA Disclaimer
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New Hampshire Water Quality Assessment Report

Assessed Waters of New Hampshire by Watershed

Select a watershed from the list:
or click on the map to choose a watershed:
Search for a waterbody within New Hampshire
Enter Waterbody Name:
Display impaired waters and TMDL information only


NOTE: In New Hampshire, all surface waters are listed as impaired for fish/shellfish consumption due to a statewide fish consumption advisory that is in effect because of elevated mercury levels in fish tissue. Excluding the statewide mercury fish/shellfish consumption advisory, the number of impaired waters is significantly less. To see assessment summaries that exclude the statewide mercury fish consumption advisory, see New Hampshire's Water Quality Assessment website.



Site-specific Targeted Monitoring Summary Results

New Hampshire (2010)

Description of this table
 
   
      
   
                     
                     
                     
                     
    16,896.3 185,272.5 99.3
           12,759.3     103,023.5     
                     
                     
           4,137.0     82,249.0     99.3
              309.1     3,748.1     .0
                    3,827.9           78,500.9           99.3
16,896.3 185,272.5 99.3
16,896.3 185,272.5 99.3
100.0 100.0 100.0

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Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2010


Statewide Statistical Survey Summary Results

New Hampshire Rivers and Streams 2010

Description of this table
Aquatic Life Use Support Use for
Rivers and Streams
Fully Supporting 5,672.0
Not Supporting 2,228.0
Total Assessed: 7,900.0
Primary Contact Recreation Use for
Rivers and Streams
Fully Supporting 12,399.0
Not Supporting 902.0
Total Assessed: 13,301.0
Secondary Contact Recreation Use for
Rivers and Streams
Fully Supporting 14,465.0
Not Supporting .0
Total Assessed: 14,465.0

Statewide Statistical Survey Stressors

New Hampshire Rivers and Streams 2010

No stressor data reported.

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Site-specific Targeted Monitoring Results

New Hampshire Rivers and Streams 2010

Description of this table

All
Rivers and Streams

16,896.3 Miles of Rivers and Streams

Assessed 16,896.3
Unassessed .0
Total Miles 16,896.3







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Description of this table

Assessed
Rivers and Streams

16,896.3 Miles of
Assessed Rivers and Streams

Good .0
Threatened .0
Impaired 16,896.3
Total Miles Assessed 16,896.3







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Description of this table

Threatened and Impaired
Rivers and Streams

16,896.3 Miles of
Threatened and Impaired
Rivers and Streams

13,068.4
.0
.0
3,827.9
Total Threatened and Impaired 16,896.3

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
New Hampshire Rivers and Streams 2010

* 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 4,200.9 5.2 .0 94.8 color.gifcolor.gif
Drinking Water Supply 16,896.3 100.0 .0 .0 color.gif
Fish Consumption 16,896.3 .0 .0 100.0 color.gif
Primary Contact Recreation 2,572.6 50.0 .0 50.0 color.gifcolor.gif
Secondary Contact Recreation 2,434.9 92.1 .0 7.9 color.gifcolor.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
New Hampshire Rivers and Streams 2010

Description of this table
Mercury Mercury color.gif 16,896.3
pH pH/Acidity/Caustic Conditions color.gif 3,419.1
Escherichia Coli (E. Coli) Pathogens color.gif 1,263.7
Dissolved Oxygen Organic Enrichment/Oxygen Depletion color.gif 600.5
Dissolved Oxygen Saturation Organic Enrichment/Oxygen Depletion color.gif 449.9
Aluminum Metals (other than Mercury) color.gif 396.4
Benthic Macroinvertebrates Bioassessments Cause Unknown - Impaired Biota color.gif 376.7
Fish Bioassessments Cause Unknown - Impaired Biota color.gif 179.6
Lead Metals (other than Mercury) color.gif 121.5
Chloride Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 99.6
Aquatic Algae Algal Growth color.gif 98.6
Habitat Assessment (Streams) Cause Unknown - Impaired Biota color.gif 93.2
Iron Metals (other than Mercury) color.gif 63.8
Other Flow Regime Alterations Flow Alteration(s) color.gif 61.8
Non-Native Aquatic Plants Nuisance Exotic Species color.gif 38.2
Copper Metals (other than Mercury) color.gif 35.1
Physical Substrate Habitat Alterations Habitat Alterations color.gif 33.7
Chlorophyll-A Algal Growth color.gif 32.3
Phosphorus, Total Nutrients color.gif 23.8
Dioxin (Including 2,3,7,8-TCDD) Dioxins color.gif 17.4
Biochemical Oxygen Demand (BOD) Organic Enrichment/Oxygen Depletion color.gif 10.9
Foam/Flocs/Scum/Oil Slicks Other Cause color.gif 9.0
Zinc Metals (other than Mercury) color.gif 8.7
Ammonia, Un-ionized Ammonia color.gif 7.1
Taste and Odor Taste, Color and Odor color.gif 6.6
Low Flow Alterations Flow Alteration(s) color.gif 5.6
Ammonia, Total Ammonia color.gif 5.1
Creosote Toxic Organics color.gif 4.1
Manganese Metals (other than Mercury) color.gif 3.2
Total Suspended Solids (TSS) Turbidity color.gif 2.7
Arsenic Metals (other than Mercury) color.gif 1.3
Chromium, Total Metals (other than Mercury) color.gif 1.1
Sedimentation/Siltation Sediment color.gif .6
DDD Pesticides color.gif .5
Turbidity Turbidity color.gif .5
Benzo[a]pyrene (PAHs) Toxic Organics color.gif .2
Cadmium Metals (other than Mercury) color.gif .1

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Site-specific Targeted Monitoring Results

Probable Sources
New Hampshire Rivers and Streams 2010

Description of this table
Atmospheric Deposition - Toxics Atmospheric Deposition color.gif 16,896.3
Source Unknown Unknown color.gif 4,168.5
Municipal (Urbanized High Density Area) Urban-Related Runoff/Stormwater color.gif 73.7
Municipal Point Source Discharges Municipal Discharges/Sewage color.gif 70.4
Highway/Road/Bridge Runoff (Non-Construction Related) Urban-Related Runoff/Stormwater color.gif 58.1
Commercial Districts (Shopping/Office Complexes) Urban-Related Runoff/Stormwater color.gif 57.2
Combined Sewer Overflows Municipal Discharges/Sewage color.gif 56.9
Illicit Connections/Hook-Ups To Storm Sewers Municipal Discharges/Sewage color.gif 49.1
Streambank Modifications/Destabilization Hydromodification color.gif 44.3
Industrial Point Source Discharge Industrial color.gif 35.2
Landfills Land Application/Waste Sites/Tanks color.gif 29.6
Impervious Surface/Parking Lot Runoff Urban-Related Runoff/Stormwater color.gif 29.1
Unspecified Urban Stormwater Urban-Related Runoff/Stormwater color.gif 28.6
Freshets Or Major Flooding Natural/Wildlife color.gif 23.6
Contaminated Groundwater Groundwater Loadings/Withdrawals color.gif 15.3
Channelization Hydromodification color.gif 12.1
Inappropriate Waste Disposal Spills/Dumping color.gif 11.2
Livestock (Grazing Or Feeding Operations) Agriculture color.gif 8.7
Impacts From Hydrostructure Flow Regulation/Modification Hydromodification color.gif 8.5
Manure Runoff Agriculture color.gif 7.5
Industrial/Commercial Site Stormwater Discharge (Permitted) Urban-Related Runoff/Stormwater color.gif 7.2
Airports Industrial color.gif 7.2
Acid Mine Drainage Resource Extraction color.gif 6.5
Flow Alterations From Water Diversions Hydromodification color.gif 5.6
Rcra Hazardous Waste Sites Industrial color.gif 4.1
Sand/Gravel/Rock Mining Or Quarries Resource Extraction color.gif 3.9
Unpermitted Discharge (Industrial/Commercial Wastes) Spills/Dumping color.gif 2.9
Unpermitted Discharge (Domestic Wastes) Municipal Discharges/Sewage color.gif 2.5
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso) Municipal Discharges/Sewage color.gif 2.1
Habitat Modification - Other Than Hydromodification Habitat Alterations (Not Directly Related To Hydromodification) color.gif 1.3
Animal Feeding Operations (Nps) Agriculture color.gif .8
Highways, Roads, Bridges, Infrastructure (New Construction) Construction color.gif .5
Petroleum/Natural Gas Activities Resource Extraction color.gif .2
Pollutants From Public Bathing Areas Recreation And Tourism (Non-Boating) color.gif .0

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Statewide Statistical Survey Summary Results

New Hampshire Lakes, Reservoirs, and Ponds 2010

Description of this table
Aquatic Life Use Support Use for
Lakes, Reservoirs, and Ponds
Fully Supporting 4,969.5
Not Supporting 180,303.0
Total Assessed: 185,272.5
Primary Contact Recreation Use for
Lakes, Reservoirs, and Ponds
Fully Supporting 182,635.4
Not Supporting 2,637.0
Total Assessed: 185,272.5
Secondary Contact Recreation Use for
Lakes, Reservoirs, and Ponds
Fully Supporting 185,272.5
Not Supporting .0
Total Assessed: 185,272.5

Statewide Statistical Survey Stressors

New Hampshire Lakes, Reservoirs, and Ponds 2010

Description of this table
pH 9,996.4 175,276.0 185,272.5
Non-Native Aquatic Plants 66,624.1 118,648.3 185,272.5
Chlorophyll-A - Aquatic Life Use Support 145,109.4 40,163.0 185,272.5
Phosphorus, Total 138,692.1 40,163.0 178,855.1
Dissolved Oxygen Saturation 162,367.5 9,525.4 171,892.9
Dissolved Oxygen 176,548.5 7,809.1 184,357.7
Cyanobacteria Hepatotoxic Microcystins 183,952.1 1,320.3 185,272.5
Chlorophyll-A - Primary Contact Recreation 183,955.7 1,316.7 185,272.5
E. Coli - Primary Contact Recreation 185,272.5 .0 185,272.5
E. Coli - Secondary Contact Recreation 185,272.5 .0 185,272.5

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Site-specific Targeted Monitoring Results

New Hampshire Lakes, Reservoirs, and Ponds 2010

Description of this table

All
Lakes, Reservoirs, and Ponds

185,272.5 Acres of Lakes, Reservoirs, and Ponds

Assessed 185,272.5
Unassessed -.0
Total Acres 185,272.5







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Description of this table

Assessed
Lakes, Reservoirs, and Ponds

185,272.5 Acres of
Assessed Lakes, Reservoirs, and Ponds

Good .0
Threatened .0
Impaired 185,272.5
Total Acres Assessed 185,272.5







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Description of this table

Threatened and Impaired
Lakes, Reservoirs, and Ponds

185,272.5 Acres of
Threatened and Impaired
Lakes, Reservoirs, and Ponds

106,771.6
.0
.0
78,500.9
Total Threatened and Impaired 185,272.5

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
New Hampshire Lakes, Reservoirs, and Ponds 2010

* 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 144,872.8 .0 .0 100.0 color.gif
Drinking Water Supply 185,272.5 100.0 .0 .0 color.gif
Fish Consumption 185,272.5 .0 .0 100.0 color.gif
Primary Contact Recreation 125,023.1 81.4 .0 18.6 color.gifcolor.gif
Secondary Contact Recreation 124,294.4 98.6 .0 1.4 color.gifcolor.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
New Hampshire Lakes, Reservoirs, and Ponds 2010

Description of this table
Mercury Mercury color.gif 185,272.5
pH pH/Acidity/Caustic Conditions color.gif 138,908.0
Non-Native Aquatic Plants Nuisance Exotic Species color.gif 70,823.2
Dissolved Oxygen Saturation Organic Enrichment/Oxygen Depletion color.gif 31,639.3
Dissolved Oxygen Organic Enrichment/Oxygen Depletion color.gif 27,069.4
Cyanobacteria Hepatotoxic Microcystins Biotoxins color.gif 17,257.9
Chlorophyll-A Algal Growth color.gif 13,800.1
Phosphorus, Total Nutrients color.gif 12,542.0
Escherichia Coli (E. Coli) Pathogens color.gif 5,338.4
Turbidity Turbidity color.gif 4,203.9
Aluminum Metals (other than Mercury) color.gif 1,546.1
Dioxin (Including 2,3,7,8-TCDD) Dioxins color.gif 280.2
Sedimentation/Siltation Sediment color.gif 244.1
Chloride Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 155.6
Iron Metals (other than Mercury) color.gif 151.3
Other Flow Regime Alterations Flow Alteration(s) color.gif 70.7
Zinc Metals (other than Mercury) color.gif 69.9
Benzo[b]fluoranthene Toxic Organics color.gif 57.9
Benzo[k]fluoranthene Toxic Organics color.gif 57.9
Benzo[a]pyrene (PAHs) Toxic Organics color.gif 57.9
DDE Pesticides color.gif 57.9
Indeno[1,2,3-Cd]Pyrene Pesticides color.gif 57.9
DDD Pesticides color.gif 56.5
Arsenic Metals (other than Mercury) color.gif 47.9
Barium Radiation color.gif 47.9
Nickel Metals (other than Mercury) color.gif 47.9
Lead Metals (other than Mercury) color.gif 46.5
Anthracene Toxic Organics color.gif 46.5
Ammonia, Total Ammonia color.gif 22.0
Biochemical Oxygen Demand (BOD) Organic Enrichment/Oxygen Depletion color.gif 22.0
Heptachlor Pesticides color.gif 10.0
Dieldrin Pesticides color.gif 10.0
Benzo[a]anthracene Toxic Organics color.gif 10.0
Chrysene Toxic Organics color.gif 10.0
Endrin Pesticides color.gif 10.0
2-Methylnaphthalene Pesticides color.gif 10.0
Pyrene Toxic Organics color.gif 10.0
Acenaphthene Toxic Organics color.gif 10.0
Lindane Pesticides color.gif 10.0
Benthic Macroinvertebrates Bioassessments Cause Unknown - Impaired Biota color.gif 3.5
Excess Algal Growth Algal Growth color.gif 1.3

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Site-specific Targeted Monitoring Results

Probable Sources
New Hampshire Lakes, Reservoirs, and Ponds 2010

Description of this table
Atmospheric Deposition - Toxics Atmospheric Deposition color.gif 185,272.5
Atmospheric Deposition - Acidity Atmospheric Deposition color.gif 138,908.0
Source Unknown Unknown color.gif 108,652.5
Naturally Occurring Organic Acids Natural/Wildlife color.gif 18,027.6
Highways, Roads, Bridges, Infrastructure (New Construction) Construction color.gif 4,206.3
Municipal Point Source Discharges Municipal Discharges/Sewage color.gif 1,020.5
Combined Sewer Overflows Municipal Discharges/Sewage color.gif 597.0
Impacts From Hydrostructure Flow Regulation/Modification Hydromodification color.gif 568.2
Municipal (Urbanized High Density Area) Urban-Related Runoff/Stormwater color.gif 443.0
Industrial Point Source Discharge Industrial color.gif 311.1
Illicit Connections/Hook-Ups To Storm Sewers Municipal Discharges/Sewage color.gif 279.0
Streambank Modifications/Destabilization Hydromodification color.gif 238.5
Channel Erosion/Incision From Upstream Hydromodifications Hydromodification color.gif 238.5
Waterfowl Natural/Wildlife color.gif 235.9
Unpermitted Discharge (Domestic Wastes) Municipal Discharges/Sewage color.gif 229.2
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems) Municipal Discharges/Sewage color.gif 227.9
Package Plant Or Other Permitted Small Flows Discharges Municipal Discharges/Sewage color.gif 191.1
Highway/Road/Bridge Runoff (Non-Construction Related) Urban-Related Runoff/Stormwater color.gif 118.2
Commercial Districts (Shopping/Office Complexes) Urban-Related Runoff/Stormwater color.gif 115.8
Residential Districts Urban-Related Runoff/Stormwater color.gif 73.6
Flow Alterations From Water Diversions Hydromodification color.gif 53.9
Pollutants From Public Bathing Areas Recreation And Tourism (Non-Boating) color.gif 20.7
Animal Feeding Operations (Nps) Agriculture color.gif 16.4
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso) Municipal Discharges/Sewage color.gif 6.8
Freshets Or Major Flooding Natural/Wildlife color.gif 5.0
Yard Maintenance Urban-Related Runoff/Stormwater color.gif .6

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Statewide Statistical Survey Summary Results

New Hampshire Bays and Estuaries 2010

Description of this table
Aquatic Life Use Support Use for
Bays and Estuaries
Fully Supporting 3.8
Not Supporting 12.8
Total Assessed: 16.7
Primary Contact Recreation Use for
Bays and Estuaries
Fully Supporting 14.7
Not Supporting 1.4
Total Assessed: 16.1
Secondary Contact Recreation Use for
Bays and Estuaries
Fully Supporting 16.6
Not Supporting .0
Total Assessed: 16.6

Statewide Statistical Survey Stressors

New Hampshire Bays and Estuaries 2010

No stressor data reported.

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Site-specific Targeted Monitoring Results

New Hampshire Bays and Estuaries 2010

Description of this table

All
Bays and Estuaries

99.3 Square Miles of Bays and Estuaries

Assessed 99.3
Unassessed .0
Total Square Miles 99.3







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Description of this table

Assessed
Bays and Estuaries

99.3 Square Miles of
Assessed Bays and Estuaries

Good .0
Threatened .0
Impaired 99.3
Total Square Miles Assessed 99.3







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Description of this table

Threatened and Impaired
Bays and Estuaries

99.3 Square Miles of
Threatened and Impaired
Bays and Estuaries

.0
.0
.0
99.3
Total Threatened and Impaired 99.3

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
New Hampshire Bays and Estuaries 2010

* 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 93.1 82.3 .0 17.7 color.gifcolor.gif
Drinking Water Supply 99.3 100.0 .0 .0 color.gif
Fish Consumption 99.3 .0 .0 100.0 color.gif
Primary Contact Recreation 97.7 88.0 .0 12.0 color.gifcolor.gif
Secondary Contact Recreation 97.8 95.3 .0 4.7 color.gifcolor.gif
Shellfish Consumption 99.3 .0 .0 100.0 color.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
New Hampshire Bays and Estuaries 2010

Description of this table
Mercury Mercury color.gif 99.3
Dioxin (Including 2,3,7,8-TCDD) Dioxins color.gif 99.3
Polychlorinated Biphenyls (PCBs) Polychlorinated Biphenyls (PCBs) color.gif 99.3
Estuarine Bioassessments Cause Unknown - Impaired Biota color.gif 15.2
Nitrogen, Total Nutrients color.gif 14.2
Light Attenuation Coefficient Turbidity color.gif 12.9
Enterococcus Bacteria Pathogens color.gif 11.7
Fecal Coliform Pathogens color.gif 11.0
pH pH/Acidity/Caustic Conditions color.gif 8.4
Chlorophyll-A Algal Growth color.gif 1.7
Dissolved Oxygen Organic Enrichment/Oxygen Depletion color.gif 1.4
Aluminum Metals (other than Mercury) color.gif 1.4
Trans-Nonachlor Pesticides color.gif 1.4
Fluoranthene Toxic Organics color.gif 1.1
Benzo[a]anthracene Toxic Organics color.gif 1.1
Pyrene Toxic Organics color.gif 1.1
Chrysene Toxic Organics color.gif 1.1
Phenanthrene Toxic Organics color.gif 1.1
Acenaphthylene Toxic Organics color.gif 1.1
Benzo[a]pyrene (PAHs) Toxic Organics color.gif 1.1
Dibenz[a,h]anthracene Toxic Organics color.gif 1.1
DDD Pesticides color.gif 1.1
Dissolved Oxygen Saturation Organic Enrichment/Oxygen Depletion color.gif 1.0
Acenaphthene Toxic Organics color.gif .9
Anthracene Toxic Organics color.gif .9
Fluorene Toxic Organics color.gif .9
Dieldrin Pesticides color.gif .9
Lead Metals (other than Mercury) color.gif .8
Copper Metals (other than Mercury) color.gif .8
Arsenic Metals (other than Mercury) color.gif .8
Nickel Metals (other than Mercury) color.gif .8
Cadmium Metals (other than Mercury) color.gif .8
Lindane Pesticides color.gif .6
Zinc Metals (other than Mercury) color.gif .5
2-Methylnaphthalene Pesticides color.gif .4
Naphthalene Pesticides color.gif .4
DDT Pesticides color.gif .4
DDE Pesticides color.gif .4
Indeno[1,2,3-Cd]Pyrene Pesticides color.gif .3
Benzo[g,h,i]perylene Toxic Organics color.gif .3
Biphenyl Toxic Organics color.gif .3

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Site-specific Targeted Monitoring Results

Probable Sources
New Hampshire Bays and Estuaries 2010

Description of this table
Atmospheric Deposition - Toxics Atmospheric Deposition color.gif 99.3
Source Unknown Unknown color.gif 99.3
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso) Municipal Discharges/Sewage color.gif 2.6
Combined Sewer Overflows Municipal Discharges/Sewage color.gif 1.0
Animal Feeding Operations (Nps) Agriculture color.gif .5
Sanitary Sewer Overflows (Collection System Failures) Municipal Discharges/Sewage color.gif .4
Illicit Connections/Hook-Ups To Storm Sewers Municipal Discharges/Sewage color.gif .4
Unpermitted Discharge (Domestic Wastes) Municipal Discharges/Sewage color.gif .2
Petroleum/Natural Gas Activities Resource Extraction color.gif .2
Forced Drainage Pumping Hydromodification color.gif .1
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems) Municipal Discharges/Sewage color.gif .1
Waterfowl Natural/Wildlife color.gif .1
Sewage Discharges In Unsewered Areas Municipal Discharges/Sewage color.gif .0

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New Hampshire Causes of Impairment for Reporting Year 2010


Description of this table
NOTE: Click on the underlined Cause of Impairment Group to see a list of specific state causes of impairment making up the Cause of Impairment Group. See also Pollution categories summary document (PDF) (20 pp, 557K, About PDF) for brief, non-technical descriptions of general cause categories.
Size of Assessed Waters with Listed Causes of Impairment
Algal Growth 130.9 13,801.4 1.7
Ammonia 12.1 22.0
Biotoxins 17,257.9
Cause Unknown - Impaired Biota 547.1 3.5 15.2
Dioxins 17.4 280.2 99.3
Flow Alteration(s) 67.5 70.7
Habitat Alterations 33.7
Mercury 16,896.3 185,272.5 99.3
Metals (other than Mercury) 503.8 1,767.3 1.4
Nuisance Exotic Species 38.2 70,823.2
Nutrients 23.8 12,542.0 14.2
Organic Enrichment/Oxygen Depletion 676.2 39,318.2 1.4
Other Cause 9.0
Pathogens 1,263.7 5,338.4 14.6
Pesticides .5 57.9 1.7
pH/Acidity/Caustic Conditions 3,419.1 138,908.0 8.4
Polychlorinated Biphenyls (PCBs) 99.3
Radiation 47.9
Salinity/Total Dissolved Solids/Chlorides/Sulfates 99.6 155.6
Sediment .6 244.1
Taste, Color and Odor 6.6
Toxic Organics 4.3 57.9 1.1
Turbidity 3.2 4,203.9 12.9

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New Hampshire Probable Sources Contributing to Impairments
for Reporting Year 2010

Description of this table
NOTE: Click on the underlined Probable Source Group to see a list of specific state Probable Sources making up the Probable Source Group.
Size of Assessed Waters with Probable Sources of Impairments
Agriculture 17.0 16.4 .5
Atmospheric Deposition 16,896.3 185,272.5 99.3
Construction .5 4,206.3
Groundwater Loadings/Withdrawals 15.3
Habitat Alterations (Not Directly Related To Hydromodification) 1.3
Hydromodification 70.6 860.5 .1
Industrial 46.5 311.1
Land Application/Waste Sites/Tanks 29.6
Municipal Discharges/Sewage 178.6 2,273.6 3.6
Natural/Wildlife 23.6 18,040.6 .1
Recreation And Tourism (Non-Boating) .0 20.7
Resource Extraction 10.5 .2
Spills/Dumping 14.1
Unknown 4,168.5 108,652.5 99.3
Urban-Related Runoff/Stormwater 86.6 519.6

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New Hampshire TMDL Alternatives by Cause of Impairment 2010


Description of this table

NOTE: Click on the underlined "Number of TMDL Alternatives by Cause of Impairment " value to see a listing of those Causes of Impairment.
Escherichia Coli (E. Coli) color.gif 27 59 218
Dioxin (Including 2,3,7,8-TCDD) color.gif 18 17 280
Ammonia, Total color.gif 3 5 22
Iron color.gif 3 12  
Phosphorus, Total color.gif 3 15  
Biochemical Oxygen Demand (BOD) color.gif 2 11 22
Copper color.gif 1 12  
Dissolved Oxygen color.gif 1 4  
Total Suspended Solids (TSS) color.gif 1 3  
Zinc color.gif 1   22

Total: 60 TMDL Alternatives

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New Hampshire Previously 303(d)-Listed Waters Now Attaining All Applicable Water Quality Standards


No previously 303(d)-listed waters reported as now attaining all applicable water quality standards.

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New Hampshire Causes of Impairment for 303(d) Listed Waters

Description of this table
NOTE: Click on a cause of impairment (e.g. pathogens) to see the specific state-reported causes that are grouped to make up this category. Click on the "Number of Causes of Impairment Reported" to see a list of waters with that cause of impairment.
pH/Acidity/Caustic Conditions color.gif 939
Pathogens color.gif 454
Organic Enrichment/Oxygen Depletion color.gif 409
Metals (other than Mercury) color.gif 164
Algal Growth color.gif 113
Nutrients color.gif 112
Cause Unknown - Impaired Biota color.gif 107
Mercury color.gif 99
Dioxins color.gif 95
Polychlorinated Biphenyls (PCBs) color.gif 95
Biotoxins color.gif 77
Toxic Organics color.gif 59
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 36
Pesticides color.gif 33
Turbidity color.gif 30
Sediment color.gif 4
Radiation color.gif 2
Other Cause color.gif 2
Taste, Color and Odor color.gif 1
Ammonia color.gif 1

Total: 2,832 Causes of Impairment

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New Hampshire Cumulative TMDLs by Pollutant

This chart includes TMDLs since October 1, 1995.

Description of this table
NOTE: Click on the underlined "Pollutant" value to see associated listed waters for which a TMDL was developed. Click on the underlined "Number of TMDLs" value to see a listing of those TMDLs for the pollutant.
Number of Causes of
Impairment Addressed
Mercury color.gif 5,124 5,124
Escherichia Coli (E. Coli) color.gif 424 424
pH color.gif 372 372
Fecal Coliform color.gif 48 48
Enterococcus Bacteria color.gif 39 39
Phosphorus, Total color.gif 31 77
Chloride color.gif 4 4
pH, Low color.gif 3 6
Carbonaceous Bod (CBOD) color.gif 2 2
NH3-N color.gif 2 2
Biochemical Oxygen Demand (BOD) color.gif 1 2
Iron color.gif 1 1
NH3 color.gif 1 2

Total: 6,052 TMDLs; 6,103 Causes of Impairment Addressed


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New Hampshire 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.
2000 color.gif 5 8
2001 color.gif 3 3
2002 color.gif 1