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Michigan Assessment Summary for Reporting Year 2008

Description of this table

	Size of Water
	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)	Wetlands (Acres)	Great Lakes Shoreline (Miles)	Great Lakes Open Water (Square Miles)	Great Lakes Connecting Channel (Miles)	Inland Lake Shoreline (Miles)
Good Waters	12,501.1	527,135.2	10.3	74.6			66.0
Previously impaired waters       now attaining all uses	188.8	735.0
Threatened Waters
TMDL completed
TMDL alternative
Non-pollutant impairment
TMDL needed
Impaired Waters	39,732.4	297,596.5	701.0	6.1	42,167.4	111.8	4.0
TMDL completed	681.5	1,060.3		.6			.2
TMDL alternative	840.7	567.1
Non-pollutant impairment	3,117.2
TMDL needed	35,093.1	295,969.1	701.0	5.5	42,167.4	111.8	3.8
New TMDLs completed	77.6	554.0	.0	.0	.0	.0	.0
Remaining TMDLs needed	35,015.5	295,415.1	701.0	5.5	42,167.4	111.8	3.8
Total Assessed Waters	52,233.5	824,731.7	711.3	80.7	42,167.4	111.8	70.0
Total Waters	52,234.0	889,600.0	6,239,763.0	3,250.0	Unavailable	Unavailable	Unavailable
Percent of Waters Assessed	100.0	92.7	.0	2.5	Unavailable	Unavailable	Unavailable

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

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

Description of this table Assessed Status Miles Assessed 52,233.5 Unassessed .5 Total Miles 52,234.0

Description of this table Attainment Status Miles Good 12,501.1 Threatened .0 Impaired 39,732.4 Total Miles Assessed 52,233.5

Description of this table TMDL Development Status Miles All TMDLs completed 759.1 TMDL alternative 840.7 Non-pollutant impairment 3,117.2 TMDL needed 35,015.5 Total Threatened and Impaired 39,732.4

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Michigan 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
Agriculture	52,233.5	100.0	.0	.0
Cold Water Fishery	3,780.1	93.2	.0	6.8
Fish Consumption	36,807.7	3.3	.0	96.7
Industrial Water Supply	52,233.5	100.0	.0	.0
Navigation	52,233.5	100.0	.0	.0
Other Indigenous Aquatic Life	42,332.4	60.1	.0	39.9
Partial Body Contact Recreation	1,844.1	1.1	.0	98.9
Public Water Supply	17.8	.0	.0	100.0
Total Body Contact Recreation	3,275.5	38.8	.0	61.2
Warm Water Fishery	6,588.1	70.2	.0	29.8

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Michigan 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
PCB in Water Column	Polychlorinated Biphenyls (PCBs)	34,733.7
PCB(s) in Fish Tissue	Polychlorinated Biphenyls (PCBs)	14,823.8
Other Flow Regime Alterations	Flow Alteration(s)	7,632.8
Mercury in Water Column	Mercury	7,179.5
Other Anthropogenic Substrate Alterations	Habitat Alterations	7,017.9
Mercury in Fish Tissue	Mercury	6,884.8
Dioxin (Including 2,3,7,8-TCDD)	Dioxins	3,124.0
Escherichia Coli (E. Coli)	Pathogens	2,003.1
Sedimentation/Siltation	Sediment	1,528.7
Dissolved Oxygen	Organic Enrichment/Oxygen Depletion	1,141.4
Phosphorus, Total	Nutrients	470.5
Organic Enrichment (Sewage) Biological Indicators	Organic Enrichment/Oxygen Depletion	186.7
Chlordane	Pesticides	148.7
Polybrominated Biphenyls	Toxic Organics	144.4
DDT	Pesticides	144.4
Excess Algal Growth	Algal Growth	119.5
Cause Unknown	Cause Unknown	62.9
Temperature, Water	Temperature	57.4
Total Suspended Solids (TSS)	Turbidity	47.0
Oil and Grease	Oil and Grease	36.8
Copper	Metals (other than Mercury)	33.6
Ammonia, Un-ionized	Ammonia	31.4
Aquatic Plants - Native	Nuisance Native Species	18.8
Total Dissolved Solids (TDS)	Salinity/Total Dissolved Solids/Chlorides/Sulfates	18.8
Nitrogen, Total	Nutrients	17.8
Petroleum Hydrocarbons	Oil and Grease	13.3
Chromium, Total	Metals (other than Mercury)	13.3
Solids (Suspended/Bedload)	Sediment	13.3
Lead	Metals (other than Mercury)	13.3
Fish Kill(s)	Cause Unknown - Fish Kills	13.1
Bacterial Slimes	Pathogens	11.3
Physical Substrate Habitat Alterations	Habitat Alterations	7.3
Polychlorinated Biphenyls (PCBs)	Polychlorinated Biphenyls (PCBs)	5.8
Ammonia, Total	Ammonia	5.4
Alterations in Wetland Habitats	Habitat Alterations	3.6

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Michigan 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	35,818.0
Channelization	Hydromodification	7,385.3
Non-Point Source	Unspecified Nonpoint Source	5,575.8
Source Unknown	Unknown	4,301.1
Agriculture	Agriculture	1,415.4
Unspecified Urban Stormwater	Urban-Related Runoff/Stormwater	1,259.1
Combined Sewer Overflows	Municipal Dishcarges/Sewage	1,077.6
Urban Runoff/Storm Sewers	Urban-Related Runoff/Stormwater	909.7
Illicit Connections/Hook-Ups To Storm Sewers	Municipal Dishcarges/Sewage	898.7
Municipal (Urbanized High Density Area)	Urban-Related Runoff/Stormwater	695.7
Streambank Modifications/Destabilization	Hydromodification	579.7
Municipal Point Source Discharges	Municipal Dishcarges/Sewage	563.4
Post-Development Erosion And Sedimentation	Hydromodification	549.0
Contaminated Sediments	Legacy/Historical Pollutants	393.3
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems)	Municipal Dishcarges/Sewage	354.6
Industrial/Commercial Site Stormwater Discharge (Permitted)	Urban-Related Runoff/Stormwater	247.9
Industrial Point Source Discharge	Industrial	225.5
Habitat Modification - Other Than Hydromodification	Habitat Alterations (Not Directly Related To Hydromodification)	164.2
Livestock (Grazing Or Feeding Operations)	Agriculture	121.7
Sources Outside State Jurisdiction Or Borders	Other	98.5
Non-Irrigated Crop Production	Agriculture	97.0
Unpermitted Discharge (Domestic Wastes)	Municipal Dishcarges/Sewage	85.7
Animal Feeding Operations (Nps)	Agriculture	84.3
Waterfowl	Natural/Wildlife	80.7
Wet Weather Discharges (Non-Point Source)	Urban-Related Runoff/Stormwater	80.1
Subsurface (Hardrock) Mining	Resource Extraction	66.7
Sewage Discharges In Unsewered Areas	Municipal Dishcarges/Sewage	62.8
Dry Weather Flows With Nps Pollutants	Urban-Related Runoff/Stormwater	61.1
Highways, Roads, Bridges, Infrastructure (New Construction)	Construction	40.1
Irrigated Crop Production	Agriculture	36.7
Loss Of Riparian Habitat	Habitat Alterations (Not Directly Related To Hydromodification)	32.2
Sanitary Sewer Overflows (Collection System Failures)	Municipal Dishcarges/Sewage	32.0
Wildlife Other Than Waterfowl	Natural/Wildlife	25.2
Upstream Impoundments (E.G., Pl-566 Nrcs Structures)	Hydromodification	23.4
Internal Nutrient Recycling	Natural/Wildlife	20.1
Wastes From Pets	Urban-Related Runoff/Stormwater	19.9
Mine Tailings	Resource Extraction	18.2
Impervious Surface/Parking Lot Runoff	Urban-Related Runoff/Stormwater	18.1
Dam Construction (Other Than Upstream Flood Control Projects)	Hydromodification	17.7
Landfills	Land Application/Waste Sites/Tanks	14.8
Petroleum/Natural Gas Activities	Resource Extraction	13.3
Dam Or Impoundment	Hydromodification	10.3
Crop Production With Subsurface Drainage	Agriculture	9.1
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso)	Municipal Dishcarges/Sewage	8.8
Site Clearance (Land Development Or Redevelopment)	Construction	8.5
Sediment Resuspension (Clean Sediment)	Hydromodification	5.2
Natural Sources	Natural/Wildlife	4.4
Contaminated Groundwater	Groundwater Loadings/Withdrawals	4.0
Highway/Road/Bridge Runoff (Non-Construction Related)	Urban-Related Runoff/Stormwater	3.9
Golf Courses	Recreation And Tourism (Non-Boating)	3.5
Permitted Runoff From Confined Animal Feeding Operations (Cafos)	Agriculture	2.5
Hydrostructure Impacts On Fish Passage	Hydromodification	1.6
Mill Tailings	Industrial	1.1

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

Description of this table Assessed Status Acres Assessed 824,731.7 Unassessed 64,868.3 Total Acres 889,600.0

Description of this table Attainment Status Acres Good 527,135.2 Threatened .0 Impaired 297,596.5 Total Acres Assessed 824,731.7

Description of this table TMDL Development Status Acres All TMDLs completed 1,614.3 TMDL alternative 567.1 Non-pollutant impairment .0 TMDL needed 295,415.1 Total Threatened and Impaired 297,596.5

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Michigan 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
Agriculture	824,731.7	100.0	.0	.0
Cold Water Fishery	87,114.5	100.0	.0	.0
Fish Consumption	320,487.2	7.6	.0	92.4
Industrial Water Supply	824,731.7	100.0	.0	.0
Navigation	824,731.7	100.0	.0	.0
Other Indigenous Aquatic Life	307,493.1	96.5	.0	3.5
Partial Body Contact Recreation	1,088.7	.0	.0	100.0
Total Body Contact Recreation	1,088.7	.0	.0	100.0
Warm Water Fishery	1,376.1	78.6	.0	21.4

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Michigan 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	230,660.3
PCB(s) in Fish Tissue	Polychlorinated Biphenyls (PCBs)	141,652.2
Chlordane	Pesticides	35,516.1
Dioxin (Including 2,3,7,8-TCDD)	Dioxins	18,569.3
Phosphorus, Total	Nutrients	7,554.3
Copper	Metals (other than Mercury)	3,139.4
Excess Algal Growth	Algal Growth	1,660.6
Nutrient/Eutrophication Biological Indicators	Nutrients	1,177.4
Escherichia Coli (E. Coli)	Pathogens	1,088.7
Polycyclic Aromatic Hydrocarbons (PAHs) (Aquatic Ecosystems)	Toxic Organics	480.4
Zinc	Metals (other than Mercury)	480.4
PCB in Water Column	Polychlorinated Biphenyls (PCBs)	125.0
Mercury in Water Column	Mercury	86.0
Polybrominated Biphenyls	Toxic Organics	86.0
DDT	Pesticides	86.0

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Michigan 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	295,962.4
Source Unknown	Unknown	16,990.6
Non-Point Source	Unspecified Nonpoint Source	12,003.9
Municipal Point Source Discharges	Municipal Dishcarges/Sewage	6,279.1
Contaminated Sediments	Legacy/Historical Pollutants	6,085.8
Agriculture	Agriculture	3,652.6
Mine Tailings	Resource Extraction	2,659.0
Industrial Point Source Discharge	Industrial	1,992.1
Unspecified Urban Stormwater	Urban-Related Runoff/Stormwater	1,129.4
Combined Sewer Overflows	Municipal Dishcarges/Sewage	969.4
Internal Nutrient Recycling	Natural/Wildlife	565.6
Sewage Discharges In Unsewered Areas	Municipal Dishcarges/Sewage	119.3
Site Clearance (Land Development Or Redevelopment)	Construction	2.0

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

Description of this table Assessed Status Acres Assessed 711.3 Unassessed 6,239,051.8 Total Acres 6,239,763.0

Description of this table Attainment Status Acres Good 10.3 Threatened .0 Impaired 701.0 Total Acres Assessed 711.3

Description of this table TMDL Development Status Acres All TMDLs completed .0 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 701.0 Total Threatened and Impaired 701.0

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Michigan 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
Agriculture	711.3	100.0	.0	.0
Fish Consumption	701.0	.0	.0	100.0
Industrial Water Supply	711.3	100.0	.0	.0
Navigation	711.3	100.0	.0	.0
Other Indigenous Aquatic Life	10.0	100.0	.0	.0

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Michigan 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
PCB(s) in Fish Tissue	Polychlorinated Biphenyls (PCBs)	701.0
PCB in Water Column	Polychlorinated Biphenyls (PCBs)	21.0

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

Description of this table

Probable Source	Probable Source Group	Acres Threatened or Impaired
Atmospheric Deposition - Toxics	Atmospheric Deposition	701.0
Landfills	Land Application/Waste Sites/Tanks	680.0

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Michigan Assessed Waters
Summary of Water Quality Attainment for Great Lakes Shoreline
Reporting Year 2008

Description of this table Assessed Status Miles Assessed 80.7 Unassessed 3,169.3 Total Miles 3,250.0

Description of this table Attainment Status Miles Good 74.6 Threatened .0 Impaired 6.1 Total Miles Assessed 80.7

Description of this table TMDL Development Status Miles All TMDLs completed .6 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 5.5 Total Threatened and Impaired 6.1

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Michigan Assessed Waters
Designated Use Support for Great Lakes Shoreline
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
Agriculture	77.7	100.0	.0	.0
Industrial Water Supply	77.7	100.0	.0	.0
Navigation	77.7	100.0	.0	.0
Other Indigenous Aquatic Life	4.2	100.0	.0	.0
Partial Body Contact Recreation	61.1	90.8	.0	9.2
Total Body Contact Recreation	8.3	26.0	.0	74.0

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Michigan Causes of Impairment
for Threatened and Impaired Great Lakes Shoreline
Reporting Year 2008

Description of this table

Cause of Impairment	Cause of Impairment Group	Miles Threatened or Impaired
Escherichia Coli (E. Coli)	Pathogens	6.1

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Michigan Probable Sources of Impairments
for Threatened and Impaired Great Lakes Shoreline
Reporting Year 2008

Description of this table

Probable Source	Probable Source Group	Miles Threatened or Impaired
Sanitary Sewer Overflows (Collection System Failures)	Municipal Dishcarges/Sewage	3.0
Source Unknown	Unknown	2.5
Illicit Connections/Hook-Ups To Storm Sewers	Municipal Dishcarges/Sewage	.6
Waterfowl	Natural/Wildlife	.4
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso)	Municipal Dishcarges/Sewage	.2
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems)	Municipal Dishcarges/Sewage	.2

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Michigan Assessed Waters
Summary of Water Quality Attainment for Great Lakes Open Water
Reporting Year 2008

Description of this table Pie chart not displayed because total size for Great Lakes Open Water is unavailable. Assessed Status Square Miles Assessed 42,167.4 Unassessed Unavailable Total Square Miles Unavailable

Description of this table Attainment Status Square Miles Good .0 Threatened .0 Impaired 42,167.4 Total Square Miles Assessed 42,167.4

Description of this table TMDL Development Status Square Miles All TMDLs completed .0 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 42,167.4 Total Threatened and Impaired 42,167.4

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Michigan Assessed Waters
Designated Use Support for Great Lakes Open Water
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	Square Miles Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
					% Threatened
					% Impaired
Agriculture	42,167.4	100.0	.0	.0
Fish Consumption	42,167.4	.0	.0	100.0
Industrial Water Supply	42,167.4	100.0	.0	.0
Navigation	42,167.4	100.0	.0	.0
Other Indigenous Aquatic Life	280.0	100.0	.0	.0
Public Water Supply	3.0	.0	.0	100.0

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Michigan Causes of Impairment
for Threatened and Impaired Great Lakes Open Water
Reporting Year 2008

Description of this table

Cause of Impairment	Cause of Impairment Group	Square Miles Threatened or Impaired
PCB(s) in Fish Tissue	Polychlorinated Biphenyls (PCBs)	42,167.4
Dioxin (Including 2,3,7,8-TCDD)	Dioxins	41,937.0
Mercury in Fish Tissue	Mercury	31,720.4
Chlordane	Pesticides	29,943.5
DDT	Pesticides	4,397.0
Nutrient/Eutrophication Biological Indicators	Nutrients	3.0
Taste and Odor	Taste, Color and Odor	3.0
Phosphorus, Total	Nutrients	3.0

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Michigan Probable Sources of Impairments
for Threatened and Impaired Great Lakes Open Water
Reporting Year 2008

Description of this table

Probable Source	Probable Source Group	Square Miles Threatened or Impaired
Atmospheric Deposition - Toxics	Atmospheric Deposition	42,167.4
Agriculture	Agriculture	4,373.0
Contaminated Sediments	Legacy/Historical Pollutants	1,136.5
Municipal Point Source Discharges	Municipal Dishcarges/Sewage	3.0
Industrial Point Source Discharge	Industrial	3.0
Non-Point Source	Unspecified Nonpoint Source	3.0
Source Unknown	Unknown	3.0

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Michigan Assessed Waters
Summary of Water Quality Attainment for Great Lakes Connecting Channel
Reporting Year 2008

Description of this table Pie chart not displayed because total size for Great Lakes Connecting Channel is unavailable. Assessed Status Miles Assessed 111.8 Unassessed Unavailable Total Miles Unavailable

Description of this table Attainment Status Miles Good .0 Threatened .0 Impaired 111.8 Total Miles Assessed 111.8

Description of this table TMDL Development Status Miles All TMDLs completed .0 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 111.8 Total Threatened and Impaired 111.8

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Michigan Assessed Waters
Designated Use Support for Great Lakes Connecting Channel
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
Agriculture	111.8	100.0	.0	.0
Fish Consumption	111.8	.0	.0	100.0
Industrial Water Supply	111.8	100.0	.0	.0
Navigation	111.8	100.0	.0	.0
Other Indigenous Aquatic Life	111.8	.0	.0	100.0
Partial Body Contact Recreation	111.8	.0	.0	100.0
Total Body Contact Recreation	111.8	.0	.0	100.0

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Michigan Causes of Impairment
for Threatened and Impaired Great Lakes Connecting Channel
Reporting Year 2008

No causes of impairment reported.

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Michigan Probable Sources of Impairments
for Threatened and Impaired Great Lakes Connecting Channel
Reporting Year 2008

No probable sources of impairments reported.

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Michigan Assessed Waters
Summary of Water Quality Attainment for Inland Lake Shoreline
Reporting Year 2008

Description of this table Pie chart not displayed because total size for Inland Lake Shoreline is unavailable. Assessed Status Miles Assessed 70.0 Unassessed Unavailable Total Miles Unavailable

Description of this table Attainment Status Miles Good 66.0 Threatened .0 Impaired 4.0 Total Miles Assessed 70.0

Description of this table TMDL Development Status Miles All TMDLs completed .2 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 3.8 Total Threatened and Impaired 4.0

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Michigan Assessed Waters
Designated Use Support for Inland Lake Shoreline
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
Agriculture	70.0	100.0	.0	.0
Industrial Water Supply	70.0	100.0	.0	.0
Navigation	70.0	100.0	.0	.0
Partial Body Contact Recreation	65.4	95.1	.0	4.9
Total Body Contact Recreation	13.6	70.6	.0	29.4

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Michigan Causes of Impairment
for Threatened and Impaired Inland Lake Shoreline
Reporting Year 2008

No causes of impairment reported.

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Michigan Probable Sources of Impairments
for Threatened and Impaired Inland Lake Shoreline
Reporting Year 2008

No probable sources of impairments reported.

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Michigan 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)	Great Lakes Shoreline (Miles)	Great Lakes Open Water (Square Miles)	Great Lakes Connecting Channel (Miles)	Inland Lake Shoreline (Miles)
Algal Growth	119.5	1,660.6
Ammonia	36.9
Cause Unknown	62.9
Cause Unknown - Fish Kills	13.1
Dioxins	3,124.0	18,569.3			41,937.0
Flow Alteration(s)	7,632.8
Habitat Alterations	7,028.8
Mercury	8,208.2	230,746.3			31,720.4
Metals (other than Mercury)	33.6	3,139.4
Nuisance Native Species	18.8
Nutrients	488.3	7,554.3			3.0
Oil and Grease	36.8
Organic Enrichment/Oxygen Depletion	1,187.8
Pathogens	2,014.4	1,088.7		6.1
Pesticides	293.0	35,602.1			29,943.5
Polychlorinated Biphenyls (PCBs)	35,218.8	141,777.2	701.0		42,167.4
Salinity/Total Dissolved Solids/Chlorides/Sulfates	18.8
Sediment	1,528.7
Taste, Color and Odor					3.0
Temperature	57.4
Toxic Organics	144.4	566.4
Turbidity	47.0

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Michigan 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)	Great Lakes Shoreline (Miles)	Great Lakes Open Water (Square Miles)	Great Lakes Connecting Channel (Miles)	Inland Lake Shoreline (Miles)
Agriculture	1,485.3	3,652.6			4,373.0
Atmospheric Deposition	35,818.0	295,962.4	701.0		42,167.4
Construction	45.8	2.0
Groundwater Loadings/Withdrawals	4.0
Habitat Alterations (Not Directly Related To Hydromodification)	196.4
Hydromodification	8,057.0
Industrial	226.6	1,992.1			3.0
Land Application/Waste Sites/Tanks	14.8		680.0
Legacy/Historical Pollutants	393.3	6,085.8			1,136.5
Municipal Dishcarges/Sewage	2,052.8	7,367.9		3.6	3.0
Natural/Wildlife	130.4	565.6		.4
Other	98.5
Recreation And Tourism (Non-Boating)	3.5
Resource Extraction	98.3	2,659.0
Unknown	4,301.1	16,990.6		2.5	3.0
Unspecified Nonpoint Source	5,575.8	12,003.9			3.0
Urban-Related Runoff/Stormwater	1,556.6	1,129.4

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Michigan TMDL Alternatives by Cause of Impairment 2008

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 Open Water (Square Miles)
PCB(s) in Fish Tissue	46	1,217	87
PCB in Water Column	42	1,173
DDT	5	144	86
Dissolved Oxygen	5	23
Polybrominated Biphenyls	5	144	86
Copper	4	3	3,139
Nutrient/Eutrophication Biological Indicators	2			3
Phosphorus, Total	2			3
Taste and Odor	2			3
Escherichia Coli (E. Coli)	1	1
Mercury in Fish Tissue	1		87
Mercury in Water Column	1	1
Organic Enrichment (Sewage) Biological Indicators	1	3
Polychlorinated Biphenyls (PCBs)	1	3
Polycyclic Aromatic Hydrocarbons (PAHs) (Aquatic Ecosystems)	1		480
Sedimentation/Siltation	1	18
Temperature, Water	1	1
Zinc	1		480

Total: 122 TMDL Alternatives

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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	16	27
2006	26	27
2008	24	29

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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
Polychlorinated Biphenyls (PCBs)	2,966
Mercury	1,069
Dioxins	196
Pathogens	92
Pesticides	71
Organic Enrichment/Oxygen Depletion	50
Nutrients	19
Sediment	18
Algal Growth	12
Flow Alteration(s)	9
Metals (other than Mercury)	7
Habitat Alterations	5
Temperature	4
Oil and Grease	4
Cause Unknown - Fish Kills	3
Ammonia	2
Cause Unknown	2
Turbidity	1
Salinity/Total Dissolved Solids/Chlorides/Sulfates	1
Nuisance Native Species	1

Total: 4,532 Causes of Impairment

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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	51
Escherichia Coli (E. Coli)	47	48
Total Suspended Solids (TSS)	16	20
Sediment	14	20
Phosphorus	10	13
Pathogens	9	9
Phosphorus, Total	9	22
Mercury	1	1
Nitrogen	1	1
Organic Enrichment/Low Dissolved Oxygen	1	1
Untreated Sewage Discharges	1	1

Total: 160 TMDLs; 187 Causes of Impairment Addressed

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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	6	7
2001	4	6
2002	9	9
2003	12	14
2004	8	9
2005	19	20
2006	10	10
2007	16	22
2008	58	61
2009	18	29

Total: 160 TMDLs; 187 Causes of Impairment Addressed

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TMDL Document Search

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