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Data are also available for these years:  2002  2004  2006

303(d) Listed Waters for 2008

Waterbody Changes from Prior Cycle

Comparison Summary by Reporting Year

For More Information:

Minnesota Assessment Report Exit EPA Disclaimer
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Minnesota 2008 Water Quality Assessment Report

Assessed Waters of Minnesota by Watershed

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Display impaired waters and TMDL information only

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Minnesota Assessment Summary for Reporting Year 2008

Description of this table
  Size of Water
Rivers and
Streams (Miles)		 Lakes, Reservoirs,
and Ponds (Acres)		 Wetlands
(Acres)
   Good Waters 2,755.1 107,417.0
      Previously impaired waters
      now attaining all uses		 988.4 140,190.0
   Threatened Waters
      TMDL completed            
      TMDL alternative            
      Non-pollutant impairment            
      TMDL needed            
   Impaired Waters 10,287.1 3,481,014.5 678.0
      TMDL completed     1,922.7     1,165,700.0    
      TMDL alternative            
      Non-pollutant impairment     7.3        
      TMDL needed     8,357.2     2,315,314.5     678.0
         New TMDLs completed     516.3     408.0     .0
         Remaining TMDLs needed           7,840.9           2,314,906.5           678.0
Total Assessed Waters 13,042.2 3,588,431.5 678.0
Total Waters 91,944.0 4,500,000.0 Unavailable
Percent of Waters Assessed 14.2 79.7 Unavailable

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Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2008


Minnesota Assessed Waters
Summary of Water Quality Attainment for Rivers and Streams
Reporting Year 2008

Description of this table
Assessed Status Miles
Assessed 13,042.2
Unassessed 78,901.8
Total Miles 91,944.0







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Attainment Status Miles
Good 2,755.1
Threatened .0
Impaired 10,287.1
Total Miles Assessed 13,042.2







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TMDL Development Status Miles
All TMDLs completed 2,439.0
TMDL alternative .0
Non-pollutant impairment 7.3
TMDL needed 7,840.9
Total Threatened and Impaired 10,287.1

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Minnesota Assessed Waters
Designated Use Support for Rivers and Streams
Reporting Year 2008*

* 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 2a Aquatic Recreation 203.4 50.6 .0 49.4 color.gifcolor.gif
Class 2a Cold Water Aquatic Consumption 116.5 .0 .0 100.0 color.gif
Class 2a Cold Water Aquatic Life 345.6 11.2 .0 88.8 color.gifcolor.gif
Class 2b Aquatic Recreation 3,465.4 22.9 .0 77.1 color.gifcolor.gif
Class 2b Warm Water Aquatic Consumption 3,473.3 .0 .0 100.0 color.gif
Class 2b Warm Water Aquatic Life 8,591.6 40.0 .0 60.0 color.gifcolor.gif
Class 2bd Aquatic Recreation 349.2 68.1 .0 31.9 color.gifcolor.gif
Class 2bd Warm Water Aquatic Consumption 1,122.2 .0 .0 100.0 color.gif
Class 2bd Warm Water Aquatic Life 818.0 36.3 .0 63.7 color.gifcolor.gif
Class 2c Aquatic Recreation 501.5 2.6 .0 97.4 color.gifcolor.gif
Class 2c Warm Water Aquatic Consumption 26.7 .0 .0 100.0 color.gif
Class 2c Warm Water Aquatic Life 1,170.6 32.4 .0 67.6 color.gifcolor.gif
Class 7 Limited Resource Value Waters 27.1 .0 .0 100.0 color.gif

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Minnesota Causes of Impairment
for Threatened and Impaired Rivers and Streams
Reporting Year 2008

Description of this table
Cause of Impairment Cause of Impairment Group Miles
Threatened or
Impaired
Turbidity Turbidity color.gif 4,763.7
Mercury in Fish Tissue Mercury color.gif 4,617.1
Fecal Coliform Pathogens color.gif 3,372.0
Fish Bioassessments Cause Unknown - Impaired Biota color.gif 2,076.5
Dissolved Oxygen Organic Enrichment/Oxygen Depletion color.gif 1,221.4
PCB(s) in Fish Tissue Polychlorinated Biphenyls (PCBs) color.gif 1,185.8
Aquatic Macroinvertebrate Bioassessments Cause Unknown - Impaired Biota color.gif 539.2
Mercury in Water Column Mercury color.gif 432.0
Arsenic Metals (other than Mercury) color.gif 146.5
pH pH/Acidity/Caustic Conditions color.gif 127.3
Chloride Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 109.1
Perfluorooctane Sulfonate (PFOS) in Fish Tissue Toxic Organics color.gif 84.8
Ammonia, Un-ionized Ammonia color.gif 77.7
PCB in Water Column Polychlorinated Biphenyls (PCBs) color.gif 43.2
Lack of a Coldwater Assemblage Other Cause color.gif 38.1
DDT Pesticides color.gif 19.1
Dieldrin Pesticides color.gif 19.1
Toxaphene Pesticides color.gif 12.6
Dioxin (Including 2,3,7,8-TCDD) Dioxins color.gif 12.6
Temperature, Water Temperature color.gif 9.6
Acetochlor Toxic Organics color.gif 9.2

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Minnesota Probable Sources of Impairments
for Threatened and Impaired Rivers and Streams
Reporting Year 2008

Description of this table
Probable Source Probable Source Group Miles
Threatened or
Impaired
Atmospheric Deposition - Toxics Atmospheric Deposition color.gif 3,768.7
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems) Municipal Dishcarges/Sewage color.gif 1,232.6
Wildlife Other Than Waterfowl Natural/Wildlife color.gif 1,210.7
Manure Runoff Agriculture color.gif 1,200.1
Municipal Point Source Discharges Municipal Dishcarges/Sewage color.gif 1,101.7
Livestock (Grazing Or Feeding Operations) Agriculture color.gif 1,075.4
Urban Runoff/Storm Sewers Urban-Related Runoff/Stormwater color.gif 753.1
Waterfowl Natural/Wildlife color.gif 663.8
Wastes From Pets Urban-Related Runoff/Stormwater color.gif 605.8
Sewage Discharges In Unsewered Areas Municipal Dishcarges/Sewage color.gif 588.9
Permitted Runoff From Confined Animal Feeding Operations (Cafos) Agriculture color.gif 567.0
Animal Feeding Operations (Nps) Agriculture color.gif 534.1
Wet Weather Discharges (Non-Point Source) Urban-Related Runoff/Stormwater color.gif 484.3
Land Application Of Wastewater Biosolids (Non-Agricultural) Land Application/Waste Sites/Tanks color.gif 348.2
Rural (Residential Areas) Other color.gif 218.8
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso) Municipal Dishcarges/Sewage color.gif 191.8
Natural Sources Natural/Wildlife color.gif 153.5
Non-Point Source Unspecified Nonpoint Source color.gif 121.0
Agriculture Agriculture color.gif 89.1
Industrial Point Source Discharge Industrial color.gif 85.8
Impacts From Land Application Of Wastes Land Application/Waste Sites/Tanks color.gif 72.7
Rangeland Grazing Agriculture color.gif 62.7
Septage Disposal Municipal Dishcarges/Sewage color.gif 24.1
Unspecified Urban Stormwater Urban-Related Runoff/Stormwater color.gif 21.9
Upstream Source Other color.gif 21.9
Crop Production (Crop Land Or Dry Land) Agriculture color.gif 21.9
Unspecified Unpaved Road Or Trail Urban-Related Runoff/Stormwater color.gif 13.1
Sand/Gravel/Rock Mining Or Quarries Resource Extraction color.gif 13.1
Unrestricted Cattle Access Agriculture color.gif 13.1
Highway/Road/Bridge Runoff (Non-Construction Related) Urban-Related Runoff/Stormwater color.gif 11.2
Salt Storage Sites Land Application/Waste Sites/Tanks color.gif 11.2
Yard Maintenance Urban-Related Runoff/Stormwater color.gif 11.2

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Minnesota Assessed Waters
Summary of Water Quality Attainment for Lakes, Reservoirs, and Ponds
Reporting Year 2008

Description of this table
Assessed Status Acres
Assessed 3,588,431.5
Unassessed 911,568.5
Total Acres 4,500,000.0







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Attainment Status Acres
Good 107,417.0
Threatened .0
Impaired 3,481,014.5
Total Acres Assessed 3,588,431.5







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TMDL Development Status Acres
All TMDLs completed 1,166,108.0
TMDL alternative .0
Non-pollutant impairment .0
TMDL needed 2,314,906.5
Total Threatened and Impaired 3,481,014.5

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Minnesota Assessed Waters
Designated Use Support for Lakes, Reservoirs, and Ponds
Reporting Year 2008*

* 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 930,273.0 48.3 .0 51.7 color.gifcolor.gif
Class 2b Warm Water Aquatic Consumption 3,365,857.5 .0 .0 100.0 color.gif

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Minnesota Causes of Impairment
for Threatened and Impaired Lakes, Reservoirs, and Ponds
Reporting Year 2008

Description of this table
Cause of Impairment Cause of Impairment Group Acres
Threatened or
Impaired
Mercury in Fish Tissue Mercury color.gif 3,365,140.5
PCB(s) in Fish Tissue Polychlorinated Biphenyls (PCBs) color.gif 1,627,559.5
Nutrient/Eutrophication Biological Indicators Nutrients color.gif 480,679.0
Mercury in Water Column Mercury color.gif 6,968.0
Perfluorooctane Sulfonate (PFOS) in Fish Tissue Toxic Organics color.gif 1,923.0

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Minnesota Probable Sources of Impairments
for Threatened and Impaired Lakes, Reservoirs, and Ponds
Reporting Year 2008

Description of this table
Probable Source Probable Source Group Acres
Threatened or
Impaired
Atmospheric Deposition - Toxics Atmospheric Deposition color.gif 1,531,834.5
Non-Point Source Unspecified Nonpoint Source color.gif 1,029.0
Unspecified Urban Stormwater Urban-Related Runoff/Stormwater color.gif 813.0
Waterfowl Natural/Wildlife color.gif 813.0
Internal Nutrient Recycling Natural/Wildlife color.gif 813.0
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems) Municipal Dishcarges/Sewage color.gif 813.0
Golf Courses Recreation And Tourism (Non-Boating) color.gif 813.0
Rural (Residential Areas) Other color.gif 813.0
Crop Production (Crop Land Or Dry Land) Agriculture color.gif 813.0
Municipal Point Source Discharges Municipal Dishcarges/Sewage color.gif 813.0
Littoral/Shore Area Modifications (Non-Riverine) Habitat Alterations (Not Directly Related To Hydromodification) color.gif 813.0
Livestock (Grazing Or Feeding Operations) Agriculture color.gif 813.0
Wildlife Other Than Waterfowl Natural/Wildlife color.gif 813.0
Yard Maintenance Urban-Related Runoff/Stormwater color.gif 216.0
Urban Runoff/Storm Sewers Urban-Related Runoff/Stormwater color.gif 216.0

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Minnesota Assessed Waters
Summary of Water Quality Attainment for Wetlands
Reporting Year 2008

Description of this table
Pie chart not displayed because total size for Wetlands is unavailable.
Assessed Status Acres
Assessed 678.0
Unassessed Unavailable
Total Acres Unavailable







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Attainment Status Acres
Good .0
Threatened .0
Impaired 678.0
Total Acres Assessed 678.0







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TMDL Development Status Acres
All TMDLs completed .0
TMDL alternative .0
Non-pollutant impairment .0
TMDL needed 678.0
Total Threatened and Impaired 678.0

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Minnesota Assessed Waters
Designated Use Support for Wetlands
Reporting Year 2008*

* 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 678.0 .0 .0 100.0 color.gif

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Minnesota Causes of Impairment
for Threatened and Impaired Wetlands
Reporting Year 2008

Description of this table
Cause of Impairment Cause of Impairment Group Acres
Threatened or
Impaired
Aquatic Plant Bioassessments Cause Unknown - Impaired Biota color.gif 651.0
Aquatic Macroinvertebrate Bioassessments Cause Unknown - Impaired Biota color.gif 61.0

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Minnesota Probable Sources of Impairments
for Threatened and Impaired Wetlands
Reporting Year 2008

No probable sources of impairments reported.

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Minnesota Causes of Impairment for Reporting Year 2008


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.
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 77.7
Cause Unknown - Impaired Biota 2,213.8 678.0
Dioxins 12.6
Mercury 4,757.5 3,365,271.5
Metals (other than Mercury) 146.5
Nutrients 480,679.0
Organic Enrichment/Oxygen Depletion 1,221.4
Other Cause 38.1
Pathogens 3,372.0
Pesticides 19.1
pH/Acidity/Caustic Conditions 127.3
Polychlorinated Biphenyls (PCBs) 1,195.0 1,627,559.5
Salinity/Total Dissolved Solids/Chlorides/Sulfates 109.1
Temperature 9.6
Toxic Organics 94.0 1,923.0
Turbidity 4,763.7

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Minnesota Probable Sources Contributing to Impairments
for Reporting Year 2008

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 1,323.3 813.0
Atmospheric Deposition 3,768.7 1,531,834.5
Habitat Alterations (Not Directly Related To Hydromodification) 813.0
Industrial 85.8
Land Application/Waste Sites/Tanks 432.1
Municipal Dishcarges/Sewage 1,283.8 813.0
Natural/Wildlife 1,364.2 813.0
Other 240.7 813.0
Recreation And Tourism (Non-Boating) 813.0
Resource Extraction 13.1
Unspecified Nonpoint Source 121.0 1,029.0
Urban-Related Runoff/Stormwater 1,334.5 1,029.0

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Minnesota TMDL Alternatives by Cause of Impairment 2008


No TMDL Alternatives reported.

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Minnesota 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 23 28
2006 color.gif 5 5
2008 color.gif 122 123

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Minnesota 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.
Cause of Impairment Group Name Number of Causes of Impairment Reported
Nutrients color.gif 329
Mercury color.gif 298
Turbidity color.gif 283
Cause Unknown - Impaired Biota color.gif 150
Pathogens color.gif 147
Polychlorinated Biphenyls (PCBs) color.gif 143
Organic Enrichment/Oxygen Depletion color.gif 62
Toxic Organics color.gif 21
Pesticides color.gif 13
pH/Acidity/Caustic Conditions color.gif 10
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 6
Ammonia color.gif 5
Other Cause color.gif 4
Dioxins color.gif 3
Algal Growth color.gif 2
Temperature color.gif 1

Total: 1,477 Causes of Impairment

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Minnesota 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.
Pollutant Number of TMDLs Number of Causes of
Impairment Addressed
Mercury color.gif 1,001 1,022
Fecal Coliform color.gif 104 107
Total Suspended Solids (TSS) color.gif 26 26
Phosphorus, Total color.gif 11 11
Fecal color.gif 7 7
Carbonaceous Bod color.gif 6 6
Phosphorus color.gif 5 5
Sediment color.gif 3 5
Biochemical Oxygen Demand (BOD) color.gif 1 1
Chloride color.gif 1 1
Total Ammonia color.gif 1 1

Total: 1,166 TMDLs; 1,192 Causes of Impairment Addressed


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Minnesota 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
2003 color.gif 20 20
2004 color.gif 2 2
2005 color.gif 7 7
2006 color.gif 24 24
2007 color.gif 541 556
2008 color.gif 516 525
2009 color.gif 56 58

Total: 1,166 TMDLs; 1,192 Causes of Impairment Addressed

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