![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
Return to home page
On This Page
2002 2004 2006 2008
On This Page
- Minnesota Assessment Summary
- Water Quality by Waterbody Type
- Causes of Impairment
- Probable Sources Contributing to Impairments
- TMDL Alternatives by Cause of Impairment
2002 2004 2006 2008
For More Information:
Minnesota Assessment Report
State Water Quality Program
Minnesota Assessment Data for 2010
Assessed Waters of Minnesota by Watershed
Search for a waterbody within Minnesota
Features
- About This Database (Integrated Report)
- Assessing Water Quality (Questions and Answers)
- Integrated Reporting Guidance
- Previous National Water Quality Reports
- EnviroMapper for Water
- AskWATERS
- EPA WATERS Homepage
- Exchange Network
- Assessment Database
- Statewide Statistical Surveys
- How's My Waterway Local Search tool
- Pollution Categories Summary Document
Site-specific Targeted Monitoring Summary Results
Minnesota (2010)
Description of this table| Size of Water | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
Wetlands (Acres) |
|||||||||||||
| Good Waters | 2,999.3 | 169,076.0 | |||||||||||||
| Previously impaired waters now attaining all uses |
8.3 | 282.0 | |||||||||||||
| Threatened Waters | |||||||||||||||
| TMDL completed | |||||||||||||||
| TMDL alternative | |||||||||||||||
| Non-pollutant impairment | |||||||||||||||
| TMDL needed | |||||||||||||||
| Impaired Waters | 11,559.1 | 3,589,335.5 | 940.0 | ||||||||||||
| TMDL completed | 2,443.3 | 1,209,582.0 | |||||||||||||
| TMDL alternative | |||||||||||||||
| Non-pollutant impairment | 66.8 | ||||||||||||||
| TMDL needed | 9,049.0 | 2,379,753.5 | 940.0 | ||||||||||||
 |
|||||||||||||||
| Total Assessed Waters | 14,558.3 | 3,758,411.5 | 940.0 | ||||||||||||
| Total Waters | 91,944.0 | 4,500,000.0 | Unavailable | ||||||||||||
| Percent of Waters Assessed | 15.8 | 83.5 | Unavailable | ||||||||||||
Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2010
Site-specific Targeted Monitoring Results
Minnesota Rivers and Streams 2010
Description of this table
|
|
Description of this table
|
|
Description of this table
|
||||||||||||||||||||||||||||||||||||
Site-specific Targeted Monitoring Results
Individual Designated Use Support
Minnesota Rivers and Streams 2010
* Waters assessed for more than one designated use are included in multiple designated use groups below.
Description of this table| Designated Use | Miles Assessed | Percent Good | Percent Threatened | Percent Impaired |  % Good |
|---|---|---|---|---|---|
 % Threatened |
|||||
 % Impaired |
|||||
| Class 1b Drinking Water | 117.4 | .0 | .0 | 100.0 | |
| Class 2a Aquatic Recreation | 219.8 | 42.7 | .0 | 57.3 | |
| Class 2a Cold Water Aquatic Consumption | 141.0 | .0 | .0 | 100.0 | |
| Class 2a Cold Water Aquatic Life | 419.2 | 11.3 | .0 | 88.7 | |
| Class 2b Aquatic Recreation | 4,016.6 | 23.7 | .0 | 76.3 | |
| Class 2b Warm Water Aquatic Consumption | 3,548.5 | .0 | .0 | 100.0 | |
| Class 2b Warm Water Aquatic Life | 9,477.5 | 39.2 | .0 | 60.8 | |
| Class 2bd Aquatic Recreation | 400.7 | 61.6 | .0 | 38.4 | |
| Class 2bd Warm Water Aquatic Consumption | 1,122.4 | .0 | .0 | 100.0 | |
| Class 2bd Warm Water Aquatic Life | 753.0 | 22.0 | .0 | 78.0 | |
| Class 2c Aquatic Recreation | 631.3 | 2.1 | .0 | 97.9 | |
| Class 2c Warm Water Aquatic Consumption | 100.5 | .0 | .0 | 100.0 | |
| Class 2c Warm Water Aquatic Life | 1,456.8 | 25.4 | .0 | 74.6 | |
| Class 7 Limited Resource Value Waters | 100.8 | .0 | .0 | 100.0 | |
Site-specific Targeted Monitoring Results
Causes of Impairment
Minnesota Rivers and Streams 2010
Description of this table
| Cause of Impairment | Cause of Impairment Group | Miles Threatened or Impaired |
|---|---|---|
| Turbidity | Turbidity | 5,887.0 |
| Mercury in Fish Tissue | Mercury | 4,790.9 |
| Fecal Coliform | Pathogens | 3,265.3 |
| Fish Bioassessments | Cause Unknown - Impaired Biota | 2,067.8 |
| Dissolved Oxygen | Organic Enrichment/Oxygen Depletion | 1,820.0 |
| PCB(s) in Fish Tissue | Polychlorinated Biphenyls (PCBs) | 1,187.4 |
| Escherichia Coli (E. Coli) | Pathogens | 771.0 |
| Aquatic Macroinvertebrate Bioassessments | Cause Unknown - Impaired Biota | 553.0 |
| Mercury in Water Column | Mercury | 433.9 |
| Chloride | Salinity/Total Dissolved Solids/Chlorides/Sulfates | 204.6 |
| Arsenic | Metals (other than Mercury) | 146.5 |
| pH | pH/Acidity/Caustic Conditions | 125.9 |
| Nitrates | Nutrients | 117.4 |
| Ammonia, Un-ionized | Ammonia | 96.6 |
| Perfluorooctane Sulfonate (PFOS) in Fish Tissue | Toxic Organics | 84.8 |
| PCB in Water Column | Polychlorinated Biphenyls (PCBs) | 43.1 |
| Lack of a Coldwater Assemblage | Other Cause | 38.1 |
| Dieldrin | Pesticides | 19.0 |
| DDT | Pesticides | 19.0 |
| Toxaphene | Pesticides | 12.5 |
| Dioxin (Including 2,3,7,8-TCDD) | Dioxins | 12.5 |
| Temperature, Water | Temperature | 9.6 |
| Acetochlor | Toxic Organics | 9.2 |
Site-specific Targeted Monitoring Results
Probable Sources
Minnesota Rivers and Streams 2010
Description of this table
| Probable Source | Probable Source Group | Miles Threatened or Impaired |
|---|---|---|
| Atmospheric Deposition - Toxics | Atmospheric Deposition | 3,771.0 |
| On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems) | Municipal Discharges/Sewage | 1,564.5 |
| Livestock (Grazing Or Feeding Operations) | Agriculture | 1,512.9 |
| Manure Runoff | Agriculture | 1,485.8 |
| Municipal Point Source Discharges | Municipal Discharges/Sewage | 1,442.1 |
| Wildlife Other Than Waterfowl | Natural/Wildlife | 1,419.6 |
| Permitted Runoff From Confined Animal Feeding Operations (Cafos) | Agriculture | 909.2 |
| Waterfowl | Natural/Wildlife | 836.7 |
| Wastes From Pets | Urban-Related Runoff/Stormwater | 817.8 |
| Urban Runoff/Storm Sewers | Urban-Related Runoff/Stormwater | 761.5 |
| Sewage Discharges In Unsewered Areas | Municipal Discharges/Sewage | 692.6 |
| Animal Feeding Operations (Nps) | Agriculture | 593.7 |
| Wet Weather Discharges (Non-Point Source) | Urban-Related Runoff/Stormwater | 472.8 |
| Land Application Of Wastewater Biosolids (Non-Agricultural) | Land Application/Waste Sites/Tanks | 420.1 |
| Crop Production (Crop Land Or Dry Land) | Agriculture | 393.4 |
| Streambank Modifications/Destabilization | Hydromodification | 331.2 |
| Impacts From Land Application Of Wastes | Land Application/Waste Sites/Tanks | 225.0 |
| Rural (Residential Areas) | Other | 218.8 |
| Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso) | Municipal Discharges/Sewage | 180.9 |
| Discharges From Municipal Separate Storm Sewer Systems (Ms4) | Urban-Related Runoff/Stormwater | 172.7 |
| Industrial Point Source Discharge | Industrial | 166.0 |
| Natural Sources | Natural/Wildlife | 153.5 |
| Agriculture | Agriculture | 144.6 |
| Non-Point Source | Unspecified Nonpoint Source | 121.3 |
| Unspecified Urban Stormwater | Urban-Related Runoff/Stormwater | 79.4 |
| Rangeland Grazing | Agriculture | 62.7 |
| Sand/Gravel/Rock Mining Or Quarries | Resource Extraction | 62.1 |
| Unrestricted Cattle Access | Agriculture | 53.3 |
| Construction Stormwater Discharge (Permitted) | Construction | 49.0 |
| Sediment Resuspension (Clean Sediment) | Hydromodification | 38.1 |
| Septage Disposal | Municipal Discharges/Sewage | 24.1 |
| Upstream Source | Other | 23.8 |
| Clean Sediments | Hydromodification | 22.1 |
| Upstream/Downstream Source | Other | 22.1 |
| Transfer Of Water From An Outside Watershed | Hydromodification | 22.1 |
| Unspecified Unpaved Road Or Trail | Urban-Related Runoff/Stormwater | 13.1 |
| Internal Nutrient Recycling | Natural/Wildlife | 12.2 |
| Salt Storage Sites | Land Application/Waste Sites/Tanks | 11.2 |
| Yard Maintenance | Urban-Related Runoff/Stormwater | 11.2 |
| Highway/Road/Bridge Runoff (Non-Construction Related) | Urban-Related Runoff/Stormwater | 11.2 |
Site-specific Targeted Monitoring Results
Minnesota Lakes, Reservoirs, and Ponds 2010
Description of this table
|
|
Description of this table
|
|
Description of this table
|
||||||||||||||||||||||||||||||||||||
Site-specific Targeted Monitoring Results
Individual Designated Use Support
Minnesota 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| Designated Use | Acres Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
|---|---|---|---|---|---|
| % Threatened |
|||||
| % Impaired |
|||||
| Class 2b Aquatic Recreation | 1,273,514.0 | 57.5 | .0 | 42.5 | |
| Class 2b Warm Water Aquatic Consumption | 3,453,214.5 | .0 | .0 | 100.0 | |
| Class 2b Warm Water Aquatic Life | 497.0 | .0 | .0 | 100.0 | |
Site-specific Targeted Monitoring Results
Causes of Impairment
Minnesota Lakes, Reservoirs, and Ponds 2010
Description of this table
| Cause of Impairment | Cause of Impairment Group | Acres Threatened or Impaired |
|---|---|---|
| Mercury in Fish Tissue | Mercury | 3,452,497.5 |
| PCB(s) in Fish Tissue | Polychlorinated Biphenyls (PCBs) | 1,627,559.5 |
| Nutrient/Eutrophication Biological Indicators | Nutrients | 541,373.0 |
| Mercury in Water Column | Mercury | 6,968.0 |
| Perfluorooctane Sulfonate (PFOS) in Fish Tissue | Toxic Organics | 2,330.0 |
| Chloride | Salinity/Total Dissolved Solids/Chlorides/Sulfates | 497.0 |
Site-specific Targeted Monitoring Results
Probable Sources
Minnesota Lakes, Reservoirs, and Ponds 2010
Description of this table
| Probable Source | Probable Source Group | Acres Threatened or Impaired |
|---|---|---|
| Atmospheric Deposition - Toxics | Atmospheric Deposition | 1,529,632.5 |
| Internal Nutrient Recycling | Natural/Wildlife | 6,986.0 |
| On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems) | Municipal Discharges/Sewage | 6,574.0 |
| Municipal Point Source Discharges | Municipal Discharges/Sewage | 6,519.0 |
| Crop Production (Crop Land Or Dry Land) | Agriculture | 5,431.0 |
| Discharges From Municipal Separate Storm Sewer Systems (Ms4) | Urban-Related Runoff/Stormwater | 5,000.0 |
| Industrial Point Source Discharge | Industrial | 4,673.0 |
| Permitted Runoff From Confined Animal Feeding Operations (Cafos) | Agriculture | 4,618.0 |
| Upstream Source | Other | 1,173.0 |
| Non-Point Source | Unspecified Nonpoint Source | 1,029.0 |
| Unspecified Urban Stormwater | Urban-Related Runoff/Stormwater | 813.0 |
| Golf Courses | Recreation And Tourism (Non-Boating) | 813.0 |
| Rural (Residential Areas) | Other | 813.0 |
| Waterfowl | Natural/Wildlife | 813.0 |
| Livestock (Grazing Or Feeding Operations) | Agriculture | 813.0 |
| Wildlife Other Than Waterfowl | Natural/Wildlife | 813.0 |
| Littoral/Shore Area Modifications (Non-Riverine) | Habitat Alterations (Not Directly Related To Hydromodification) | 813.0 |
| Urban Runoff/Storm Sewers | Urban-Related Runoff/Stormwater | 301.0 |
| Yard Maintenance | Urban-Related Runoff/Stormwater | 216.0 |
| Wet Weather Discharges (Non-Point Source) | Urban-Related Runoff/Stormwater | 55.0 |
| Construction Stormwater Discharge (Permitted) | Construction | 55.0 |
Site-specific Targeted Monitoring Results
Minnesota Wetlands 2010
Description of this table
|
|
Description of this table
|
|
Description of this table
|
||||||||||||||||||||||||||||||||||||
Site-specific Targeted Monitoring Results
Individual Designated Use Support
Minnesota Wetlands 2010
* Waters assessed for more than one designated use are included in multiple designated use groups below.
Description of this table| Designated Use | Acres Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
|---|---|---|---|---|---|
| % Threatened |
|||||
| % Impaired |
|||||
| Class 2d Wetland Aquatic Life | 940.0 | .0 | .0 | 100.0 | |
Site-specific Targeted Monitoring Results
Causes of Impairment
Minnesota Wetlands 2010
Description of this table
| Cause of Impairment | Cause of Impairment Group | Acres Threatened or Impaired |
|---|---|---|
| Aquatic Plant Bioassessments | Cause Unknown - Impaired Biota | 878.0 |
| Aquatic Macroinvertebrate Bioassessments | Cause Unknown - Impaired Biota | 323.0 |
Site-specific Targeted Monitoring Results
Probable Sources
Minnesota Wetlands 2010
No probable sources of impairments reported.
Minnesota 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. | |||||||||||||||
| Cause of Impairment Group | Size of Assessed Waters with Listed Causes of Impairment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
Wetlands (Acres) |
|||||||||||||
| Ammonia | 96.6 | ||||||||||||||
| Cause Unknown - Impaired Biota | 2,205.0 | 940.0 | |||||||||||||
| Dioxins | 12.5 | ||||||||||||||
| Mercury | 4,931.3 | 3,452,628.5 | |||||||||||||
| Metals (other than Mercury) | 146.5 | ||||||||||||||
| Nutrients | 117.4 | 541,373.0 | |||||||||||||
| Organic Enrichment/Oxygen Depletion | 1,820.0 | ||||||||||||||
| Other Cause | 38.1 | ||||||||||||||
| Pathogens | 4,036.3 | ||||||||||||||
| Pesticides | 19.0 | ||||||||||||||
| pH/Acidity/Caustic Conditions | 125.9 | ||||||||||||||
| Polychlorinated Biphenyls (PCBs) | 1,196.6 | 1,627,559.5 | |||||||||||||
| Salinity/Total Dissolved Solids/Chlorides/Sulfates | 204.6 | 497.0 | |||||||||||||
| Temperature | 9.6 | ||||||||||||||
| Toxic Organics | 94.0 | 2,330.0 | |||||||||||||
| Turbidity | 5,887.0 | ||||||||||||||
Minnesota 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. | |||||||||||||||
| Probable Source Group | Size of Assessed Waters with Probable Sources of Impairments | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
Wetlands (Acres) |
|||||||||||||
| Agriculture | 1,904.2 | 5,431.0 | |||||||||||||
| Atmospheric Deposition | 3,771.0 | 1,529,632.5 | |||||||||||||
| Construction | 49.0 | 55.0 | |||||||||||||
| Habitat Alterations (Not Directly Related To Hydromodification) | 813.0 | ||||||||||||||
| Hydromodification | 353.3 | ||||||||||||||
| Industrial | 166.0 | 4,673.0 | |||||||||||||
| Land Application/Waste Sites/Tanks | 584.4 | ||||||||||||||
| Municipal Discharges/Sewage | 1,777.0 | 6,574.0 | |||||||||||||
| Natural/Wildlife | 1,585.2 | 6,986.0 | |||||||||||||
| Other | 264.7 | 1,986.0 | |||||||||||||
| Recreation And Tourism (Non-Boating) | 813.0 | ||||||||||||||
| Resource Extraction | 62.1 | ||||||||||||||
| Unspecified Nonpoint Source | 121.3 | 1,029.0 | |||||||||||||
| Urban-Related Runoff/Stormwater | 1,706.5 | 6,114.0 | |||||||||||||
Minnesota 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. | ||||||||||||||
| Cause of Impairment | Number of TMDL Alternatives |
Lakes, Reservoirs, and Ponds (Acres) |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nutrient/Eutrophication Biological Indicators |  1 |
11 | ||||||||||||
Total: 1 TMDL Alternatives