On This Page
- Michigan Assessment Summary
- Water Quality by Waterbody Type
- Causes of Impairment
- Probable Sources Contributing to Impairments
- Previously Impaired Waters Now Attaining All Uses
- TMDL Alternatives by Cause of Impairment
- Causes of Impairment for 303(d) Listed Waters
- Cumulative TMDLs by Pollutant
- Cumulative Number of TMDLs
Data are also available for these years: 2002 2004 2008
Waterbody Changes from Prior Cycle
Comparison Summary by Reporting Year
For More Information:
Michigan 2006 Water Quality Assessment Report
NOTE: Assumptions made in report may not be reflected in specific database records. This may lead to differences when comparing mileage/acreage numbers from Michigan's 2006 report with numbers taken from Michigan's 2006 ADB.
Michigan Assessment Summary for Reporting Year 2006
Description of this tableSummary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2006
Michigan Assessed Waters
Summary of Water Quality Attainment for Rivers and Streams
Reporting Year 2006
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Michigan Assessed Waters
Designated Use Support for Rivers and Streams
Reporting Year 2006*
* 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 | |
|---|---|---|---|---|---|
| Agriculture | 46,449.0 | 100.0 | .0 | .0 | |
| Cold Water Fishery | 1,221.5 | 91.6 | .0 | 8.4 | |
| Fish Consumption | 22,708.6 | 7.6 | .0 | 92.4 | |
| Industrial Water Supply | 46,449.0 | 100.0 | .0 | .0 | |
| Navigation | 46,449.0 | 100.0 | .0 | .0 | |
| Other Indigenous Aquatic Life | 22,410.0 | 80.2 | .0 | 19.8 | |
| Partial Body Contact Recreation | 19.0 | .0 | .0 | 100.0 | |
| Public Water Supply | 16.0 | .0 | .0 | 100.0 | |
| Total Body Contact Recreation | 1,426.3 | 63.3 | .0 | 36.7 | |
| Warm Water Fishery | 1,909.5 | 64.7 | .0 | 35.3 |
Michigan Causes of Impairment
for Threatened and Impaired Rivers and Streams
Reporting Year 2006
Description of this table
| Cause of Impairment | Cause of Impairment Group | Miles Threatened or Impaired |
|---|---|---|
| Polychlorinated Biphenyls (PCBs) | Polychlorinated Biphenyls (PCBs) | |
| Other Flow Regime Alterations | Flow Alteration(s) | |
| Other Anthropogenic Substrate Alterations | Habitat Alterations | |
| PCB(s) in Fish Tissue | Polychlorinated Biphenyls (PCBs) | |
| Dioxin (Including 2,3,7,8-TCDD) | Dioxins | |
| Mercury in Fish Tissue | Mercury | |
| Escherichia Coli (E. Coli) | Pathogens | |
| Sedimentation/Siltation | Sediment | |
| Dissolved Oxygen | Organic Enrichment/Oxygen Depletion | |
| Mercury in Water Column | Mercury | |
| Phosphorus, Total | Nutrients | |
| Organic Enrichment (Sewage) Biological Indicators | Organic Enrichment/Oxygen Depletion | |
| Polybrominated Biphenyls | Toxic Organics | |
| DDT | Pesticides | |
| Copper | Metals (other than Mercury) | |
| Temperature, Water | Temperature | |
| Oil and Grease | Oil and Grease | |
| Nitrogen, Total | Nutrients | |
| Ammonia, Un-ionized | Ammonia | |
| Total Dissolved Solids (TDS) | Salinity/Total Dissolved Solids/Chlorides/Sulfates | |
| Chromium, Total | Metals (other than Mercury) | |
| Aquatic Plants - Native | Nuisance Native Species | |
| Chlordane | Pesticides | |
| Alterations in Wetland Habitats | Habitat Alterations | |
| Bacterial Slimes | Pathogens | |
| Lead | Metals (other than Mercury) | |
| Ammonia, Total | Ammonia | |
| Phosphorus, Elemental | Nutrients | |
| Aldrin | Pesticides | |
| Lindane | Pesticides | |
| Simazine | Pesticides | |
| Terbacil | Pesticides | |
| Other Cause | Other Cause |
Michigan Probable Sources of Impairments
for Threatened and Impaired Rivers and Streams
Reporting Year 2006
Description of this table
| Probable Source | Probable Source Group | Miles Threatened or Impaired |
|---|---|---|
| Atmospheric Deposition - Toxics | Atmospheric Deposition | |
| Industrial Point Source Discharge | Industrial | |
| Contaminated Sediments | Legacy/Historical Pollutants | |
| Municipal Point Source Discharges | Municipal Dishcarges/Sewage | |
| Channelization | Hydromodification | |
| Unspecified Urban Stormwater | Urban-Related Runoff/Stormwater | |
| Non-Point Source | Unspecified Nonpoint Source | |
| Agriculture | Agriculture | |
| Combined Sewer Overflows | Municipal Dishcarges/Sewage | |
| Source Unknown | Unknown | |
| Non-Irrigated Crop Production | Agriculture | |
| Streambank Modifications/Destablization | Hydromodification | |
| Livestock (Grazing Or Feeding Operations) | Agriculture | |
| Habitat Modification - Other Than Hydromodification | Habitat Alterations (Not Directly Related To Hydromodification) | |
| Animal Feeding Operations (Nps) | Agriculture | |
| Sewage Discharges In Unsewered Areas | Municipal Dishcarges/Sewage | |
| Highways, Roads, Bridges, Infrasturcture (New Construction) | Construction | |
| Loss Of Riparian Habitat | Habitat Alterations (Not Directly Related To Hydromodification) | |
| Illicit Connections/Hook-Ups To Storm Sewers | Municipal Dishcarges/Sewage | |
| Post-Development Erosion And Sedimentation | Hydromodification | |
| Mine Tailings | Resource Extraction | |
| Irrigated Crop Production | Agriculture | |
| Subsurface (Hardrock) Minining | Resource Extraction | |
| Surface Mining | Resource Extraction | |
| Mill Tailings | Industrial | |
| Above Ground Storage Tank Leaks (Tank Farms) | Spills/Dumping | |
| Site Clearance (Land Development Or Redevelopment) | Construction | |
| Impacts From Land Application Of Wastes | Land Application/Waste Sites/Tanks | |
| On-Site Treatment Systems (Septic Systems And Similar Decencentralized Systems) | Municipal Dishcarges/Sewage | |
| Landfills | Land Application/Waste Sites/Tanks | |
| Sanitary Sewer Overflows (Collection System Failures) | Municipal Dishcarges/Sewage | |
| Dam Construction (Other Than Upstream Flood Control Projects) | Hydromodification | |
| Leaking Underground Storage Tanks | Land Application/Waste Sites/Tanks | |
| Petroleum/Natural Gas Production Activities (Permitted) | Industrial | |
| Contaminated Groundwater | Groundwater Loadings/Withdrawals | |
| Golf Courses | Recreation And Tourism (Non-Boating) | |
| Sediment Resuspension (Clean Sediment) | Hydromodification | |
| Permitted Runoff From Confined Animal Feeding Operations (Cafos) | Agriculture | |
| Highway/Road/Bridge Runoff (Non-Construction Related) | Urban-Related Runoff/Stormwater | |
| Natural Sources | Natural/Wildlife |
Michigan Assessed Waters
Summary of Water Quality Attainment for Lakes, Reservoirs, and Ponds
Reporting Year 2006
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Michigan Assessed Waters
Designated Use Support for Lakes, Reservoirs, and Ponds
Reporting Year 2006*
* 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 | |
|---|---|---|---|---|---|
| Agriculture | 562,855.0 | 100.0 | .0 | .0 | |
| Fish Consumption | 286,552.0 | .0 | .0 | 100.0 | |
| Industrial Water Supply | 562,855.0 | 100.0 | .0 | .0 | |
| Navigation | 562,855.0 | 100.0 | .0 | .0 | |
| Other Indigenous Aquatic Life | 56,536.0 | 80.7 | .0 | 19.3 | |
| Total Body Contact Recreation | 1,090.0 | .0 | .0 | 100.0 | |
| Warm Water Fishery | 830.0 | .0 | .0 | 100.0 |
Michigan Causes of Impairment
for Threatened and Impaired Lakes, Reservoirs, and Ponds
Reporting Year 2006
Description of this table
| Cause of Impairment | Cause of Impairment Group | Acres Threatened or Impaired |
|---|---|---|
| Mercury in Fish Tissue | Mercury | |
| PCB(s) in Fish Tissue | Polychlorinated Biphenyls (PCBs) | |
| Chlordane | Pesticides | |
| Dioxin (Including 2,3,7,8-TCDD) | Dioxins | |
| Phosphorus, Total | Nutrients | |
| Copper | Metals (other than Mercury) | |
| Escherichia Coli (E. Coli) | Pathogens | |
| Nutrient/Eutrophication Biological Indicators | Nutrients | |
| Polycyclic Aromatic Hydrocarbons (PAHs) (Aquatic Ecosystems) | Toxic Organics | |
| Taste and Odor | Taste, Color and Odor | |
| Zinc | Metals (other than Mercury) | |
| Excess Algal Growth | Algal Growth | |
| Polybrominated Biphenyls | Toxic Organics | |
| DDT | Pesticides | |
| Organic Enrichment (Sewage) Biological Indicators | Organic Enrichment/Oxygen Depletion |
Michigan Probable Sources of Impairments
for Threatened and Impaired Lakes, Reservoirs, and Ponds
Reporting Year 2006
Description of this table
| Probable Source | Probable Source Group | Acres Threatened or Impaired |
|---|---|---|
| Atmospheric Deposition - Toxics | Atmospheric Deposition | |
| Source Unknown | Unknown | |
| Contaminated Sediments | Legacy/Historical Pollutants | |
| Municipal Point Source Discharges | Municipal Dishcarges/Sewage | |
| Industrial Point Source Discharge | Industrial | |
| Non-Point Source | Unspecified Nonpoint Source | |
| Agriculture | Agriculture | |
| Mill Tailings | Industrial | |
| Mine Tailings | Resource Extraction | |
| Above Ground Storage Tank Leaks (Tank Farms) | Spills/Dumping | |
| Unspecified Urban Stormwater | Urban-Related Runoff/Stormwater | |
| Combined Sewer Overflows | Municipal Dishcarges/Sewage | |
| Sewage Discharges In Unsewered Areas | Municipal Dishcarges/Sewage | |
| Internal Nutrient Recycling | Natural/Wildlife | |
| Animal Feeding Operations (Nps) | Agriculture | |
| Site Clearance (Land Development Or Redevelopment) | Construction |
Michigan Assessed Waters
Summary of Water Quality Attainment for Wetlands
Reporting Year 2006
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Michigan Assessed Waters
Designated Use Support for Wetlands
Reporting Year 2006*
* 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 | |
|---|---|---|---|---|---|
| Fish Consumption | 711.0 | 1.4 | .0 | 98.6 | |
| Other Indigenous Aquatic Life | 711.0 | 100.0 | .0 | .0 |
Michigan Causes of Impairment
for Threatened and Impaired Wetlands
Reporting Year 2006
Description of this table
| Cause of Impairment | Cause of Impairment Group | Acres Threatened or Impaired |
|---|---|---|
| PCB(s) in Fish Tissue | Polychlorinated Biphenyls (PCBs) |
Michigan Probable Sources of Impairments
for Threatened and Impaired Wetlands
Reporting Year 2006
Description of this table
| Probable Source | Probable Source Group | Acres Threatened or Impaired |
|---|---|---|
| Industrial Point Source Discharge | Industrial | |
| Atmospheric Deposition - Toxics | Atmospheric Deposition |
Michigan Assessed Waters
Summary of Water Quality Attainment for Great Lakes Shoreline
Reporting Year 2006
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Michigan Assessed Waters
Designated Use Support for Great Lakes Shoreline
Reporting Year 2006*
* 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 | |
|---|---|---|---|---|---|
| Agriculture | 158.0 | 100.0 | .0 | .0 | |
| Industrial Water Supply | 158.0 | 100.0 | .0 | .0 | |
| Navigation | 158.0 | 100.0 | .0 | .0 | |
| Other Indigenous Aquatic Life | 2.5 | 100.0 | .0 | .0 | |
| Partial Body Contact Recreation | 4.7 | .0 | .0 | 100.0 | |
| Public Water Supply | 80.0 | .0 | .0 | 100.0 | |
| Total Body Contact Recreation | 64.3 | 87.7 | .0 | 12.3 |
Michigan Causes of Impairment
for Threatened and Impaired Great Lakes Shoreline
Reporting Year 2006
Description of this table
| Cause of Impairment | Cause of Impairment Group | Miles Threatened or Impaired |
|---|---|---|
| Taste and Odor | Taste, Color and Odor | |
| Escherichia Coli (E. Coli) | Pathogens |
Michigan Probable Sources of Impairments
for Threatened and Impaired Great Lakes Shoreline
Reporting Year 2006
Description of this table
| Probable Source | Probable Source Group | Miles Threatened or Impaired |
|---|---|---|
| Agriculture | Agriculture | |
| Industrial Point Source Discharge | Industrial | |
| Municipal Point Source Discharges | Municipal Dishcarges/Sewage | |
| Combined Sewer Overflows | Municipal Dishcarges/Sewage | |
| Source Unknown | Unknown |
Michigan Assessed Waters
Summary of Water Quality Attainment for Great Lakes Open Water
Reporting Year 2006
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Michigan Assessed Waters
Designated Use Support for Great Lakes Open Water
Reporting Year 2006*
* Waters assessed for more than one designated use are included in multiple designated use groups below.
Description of this table| Designated Use | Square Miles Assessed | Percent Good | Percent Threatened | Percent Impaired | |
|---|---|---|---|---|---|
| Agriculture | 42,660.0 | 100.0 | .0 | .0 | |
| Fish Consumption | 41,608.0 | .0 | .0 | 100.0 | |
| Industrial Water Supply | 42,660.0 | 100.0 | .0 | .0 | |
| Navigation | 42,660.0 | 100.0 | .0 | .0 | |
| Other Indigenous Aquatic Life | 875.0 | 100.0 | .0 | .0 |
Michigan Causes of Impairment
for Threatened and Impaired Great Lakes Open Water
Reporting Year 2006
Description of this table
| Cause of Impairment | Cause of Impairment Group | Square Miles Threatened or Impaired |
|---|---|---|
| PCB(s) in Fish Tissue | Polychlorinated Biphenyls (PCBs) | |
| Dioxin (Including 2,3,7,8-TCDD) | Dioxins | |
| Chlordane | Pesticides | |
| Mercury in Fish Tissue | Mercury | |
| DDT | Pesticides |
Michigan Probable Sources of Impairments
for Threatened and Impaired Great Lakes Open Water
Reporting Year 2006
Description of this table
| Probable Source | Probable Source Group | Square Miles Threatened or Impaired |
|---|---|---|
| Atmospheric Deposition - Toxics | Atmospheric Deposition | |
| Contaminated Sediments | Legacy/Historical Pollutants | |
| Agriculture | Agriculture | |
| Industrial Point Source Discharge | Industrial |
Michigan Assessed Waters
Summary of Water Quality Attainment for Great Lakes Connecting Channel
Reporting Year 2006
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Michigan Assessed Waters
Designated Use Support for Great Lakes Connecting Channel
Reporting Year 2006*
* 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 | |
|---|---|---|---|---|---|
| Agriculture | 415.0 | 100.0 | .0 | .0 | |
| Fish Consumption | 194.0 | .0 | .0 | 100.0 | |
| Industrial Water Supply | 415.0 | 100.0 | .0 | .0 | |
| Navigation | 415.0 | 100.0 | .0 | .0 | |
| Other Indigenous Aquatic Life | 124.0 | 79.8 | .0 | 20.2 | |
| Partial Body Contact Recreation | 97.0 | 100.0 | .0 | .0 | |
| Total Body Contact Recreation | 97.0 | .0 | .0 | 100.0 |
Michigan Causes of Impairment
for Threatened and Impaired Great Lakes Connecting Channel
Reporting Year 2006
No causes of impairment reported.
Michigan Probable Sources of Impairments
for Threatened and Impaired Great Lakes Connecting Channel
Reporting Year 2006
No probable sources of impairments reported.
Michigan Assessed Waters
Summary of Water Quality Attainment for Inland Lake Shoreline
Reporting Year 2006
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Michigan Assessed Waters
Designated Use Support for Inland Lake Shoreline
Reporting Year 2006*
* 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 | |
|---|---|---|---|---|---|
| Agriculture | 29.9 | 100.0 | .0 | .0 | |
| Industrial Water Supply | 29.9 | 100.0 | .0 | .0 | |
| Navigation | 29.9 | 100.0 | .0 | .0 | |
| Other Indigenous Aquatic Life | .8 | 100.0 | .0 | .0 | |
| Partial Body Contact Recreation | .5 | .0 | .0 | 100.0 | |
| Total Body Contact Recreation | 25.1 | 94.9 | .0 | 5.1 |
Michigan Causes of Impairment
for Threatened and Impaired Inland Lake Shoreline
Reporting Year 2006
No causes of impairment reported.
Michigan Probable Sources of Impairments
for Threatened and Impaired Inland Lake Shoreline
Reporting Year 2006
No probable sources of impairments reported.
Michigan Causes of Impairment for Reporting Year 2006
Description of this table
Michigan Probable Sources Contributing to Impairments
for Reporting Year 2006
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Michigan TMDL Alternatives by Cause of Impairment 2006
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 |
Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
Great Lakes Shoreline (Miles) |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PCB(s) in Fish Tissue | 287 | 100 | ||||||||||||
| Copper | 3 | 3,159 | ||||||||||||
| DDT | 36 | 123 | ||||||||||||
| Dissolved Oxygen | 11 | |||||||||||||
| Escherichia Coli (E. Coli) | 4 | |||||||||||||
| Other Flow Regime Alterations | 6 | |||||||||||||
| Polybrominated Biphenyls | 36 | 123 | ||||||||||||
| Polychlorinated Biphenyls (PCBs) | 3 | |||||||||||||
| Taste and Odor | 500 | 80 | ||||||||||||
| Ammonia, Total | 3 | |||||||||||||
| Mercury in Fish Tissue | 100 | |||||||||||||
| Mercury in Water Column | 1 | |||||||||||||
| Organic Enrichment (Sewage) Biological Indicators | 3 | |||||||||||||
| Other Anthropogenic Substrate Alterations | 3 | |||||||||||||
| Phosphorus, Total | 3 | |||||||||||||
| Polycyclic Aromatic Hydrocarbons (PAHs) (Aquatic Ecosystems) | 500 | |||||||||||||
| Sedimentation/Siltation | 8 | |||||||||||||
| Zinc | 500 | |||||||||||||
Total: 37 TMDL Alternatives
Michigan 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 | 27 | |
| 2006 | 27 | |
| 2008 | 29 | |
Michigan 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 |
|---|---|
| Mercury | |
| Polychlorinated Biphenyls (PCBs) | |
| Pathogens | |
| Cause Unknown - Impaired Biota | |
| Nutrients | |
| Pesticides | |
| Organic Enrichment/Oxygen Depletion | |
| Dioxins | |
| Noxious Aquatic Plants | |
| Algal Growth | |
| Metals (other than Mercury) | |
| Cause Unknown - Fish Kills | |
| Salinity/Total Dissolved Solids/Chlorides/Sulfates | |
| Oil and Grease | |
| Toxic Organics | |
| Turbidity | |
| Sediment | |
Total: 557 Causes of Impairment
Michigan 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 |
|---|---|---|
| Polychlorinated Biphenyls (PCBs) | 51 | |
| Escherichia Coli (E. Coli) | 48 | |
| Total Suspended Solids (TSS) | 20 | |
| Sediment | 20 | |
| Phosphorus | 13 | |
| Pathogens | 9 | |
| Phosphorus, Total | 22 | |
| Mercury | 1 | |
| Nitrogen | 1 | |
| Organic Enrichment/Low Dissolved Oxygen | 1 | |
| Untreated Sewage Discharges | 1 | |
Total: 160 TMDLs; 187 Causes of Impairment Addressed
Michigan 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 |
|---|---|---|
| 2000 | 7 | |
| 2001 | 6 | |
| 2002 | 9 | |
| 2003 | 14 | |
| 2004 | 9 | |
| 2005 | 20 | |
| 2006 | 10 | |
| 2007 | 22 | |
| 2008 | 61 | |
| 2009 | 29 | |
Total: 160 TMDLs; 187 Causes of Impairment Addressed
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