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Maine Assessment Summary for Reporting Year 2008

Description of this table

	Size of Water
	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)
Good Waters	29,719.1	891,917.0
Previously impaired waters       now attaining all uses
Threatened Waters
TMDL completed
TMDL alternative
Non-pollutant impairment
TMDL needed
Impaired Waters	1,203.5	77,258.0
TMDL completed	81.6	9,517.0
TMDL alternative	101.9
Non-pollutant impairment	30.2	48,964.0
TMDL needed	989.8	18,777.0
New TMDLs completed	73.4	.0
Remaining TMDLs needed	916.4	18,777.0
Total Assessed Waters	30,922.6	969,175.0
Total Waters	45,177.0	1,000,413.0
Percent of Waters Assessed	68.4	96.9

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

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

Description of this table Assessed Status Miles Assessed 30,922.6 Unassessed 14,254.5 Total Miles 45,177.0

Description of this table Attainment Status Miles Good 29,719.1 Threatened .0 Impaired 1,203.5 Total Miles Assessed 30,922.6

Description of this table TMDL Development Status Miles All TMDLs completed 155.0 TMDL alternative 101.9 Non-pollutant impairment 30.2 TMDL needed 916.4 Total Threatened and Impaired 1,203.5

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Maine 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
Drinking Water Supply After Disinfection	4,400.1	100.0	.0	.0
Drinking Water Supply After Treatment	1,053.2	99.7	.0	.3
Fish And Other Aquatic Life	30,647.4	98.0	.0	2.0
Fish Consumption	5,548.5	88.4	.0	11.6
Fishing	5,450.6	99.8	.0	.2
Hydroelectric Power Generation	1,665.2	100.0	.0	.0
Industrial Process And Cooling Water Supply	1,665.2	100.0	.0	.0
Navigation	5,443.0	99.9	.0	.1
Primary Contact Recreation	5,448.2	95.9	.0	4.1
Secondary Contact Recreation	5,445.9	96.2	.0	3.8

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Maine 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
Polychlorinated Biphenyls (PCBs)	Polychlorinated Biphenyls (PCBs)	391.8
Dioxin (Including 2,3,7,8-TCDD)	Dioxins	381.0
Dissolved Oxygen	Organic Enrichment/Oxygen Depletion	346.2
DDT	Pesticides	214.2
Escherichia Coli (E. Coli)	Pathogens	203.9
Benthic Macroinvertebrates Bioassessments	Cause Unknown - Impaired Biota	193.0
Nutrient/Eutrophication Biological Indicators	Nutrients	107.0
Habitat Assessment (Streams)	Cause Unknown - Impaired Biota	69.5
Phosphorus, Total	Nutrients	52.4
Other Flow Regime Alterations	Flow Alteration(s)	32.2
Biochemical Oxygen Demand (BOD)	Organic Enrichment/Oxygen Depletion	32.0
Ammonia, Un-ionized	Ammonia	29.4
Copper	Metals (other than Mercury)	26.6
Zinc	Metals (other than Mercury)	26.6
Lead	Metals (other than Mercury)	26.6
Arsenic	Metals (other than Mercury)	20.5
Selenium	Metals (other than Mercury)	20.5
Aluminum	Metals (other than Mercury)	20.5
Silver	Metals (other than Mercury)	20.5
Iron	Metals (other than Mercury)	9.4
Chlorophyll-A	Algal Growth	8.2
Total Suspended Solids (TSS)	Turbidity	8.2
Nickel	Metals (other than Mercury)	6.1
Cadmium	Metals (other than Mercury)	6.1
Chromium, Total	Metals (other than Mercury)	6.1
Benzene	Toxic Organics	4.5
Nitrogen, Total	Nutrients	3.5
1,2-Dichloroethane	Pesticides	3.2
1,1-Dichloroethane	Toxic Organics	3.2
pH	pH/Acidity/Caustic Conditions	1.0
Cause Unknown	Cause Unknown	.6

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Maine 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
Agriculture	Agriculture	329.6
Non-Point Source	Unspecified Nonpoint Source	96.2
Municipal Point Source Discharges	Municipal Dishcarges/Sewage	89.7
Industrial Point Source Discharge	Industrial	68.0
Post-Development Erosion And Sedimentation	Hydromodification	58.1
Dam Or Impoundment	Hydromodification	55.5
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso)	Municipal Dishcarges/Sewage	48.6
Unspecified Urban Stormwater	Urban-Related Runoff/Stormwater	35.0
Upstream Source	Other	26.0
Habitat Modification - Other Than Hydromodification	Habitat Alterations (Not Directly Related To Hydromodification)	25.8
Flow Alterations From Water Diversions	Hydromodification	25.0
Inappropriate Waste Disposal	Spills/Dumping	13.9
Rcra Hazardous Waste Sites	Industrial	12.2
Aquaculture (Permitted)	Aquaculture	9.1
Sources Outside State Jurisdiction Or Borders	Other	8.2
Impacts From Abandoned Mine Lands (Inactive)	Resource Extraction	3.0
Airports	Industrial	2.5
Impacts From Hydrostructure Flow Regulation/Modification	Hydromodification	1.0
Source Unknown	Unknown	.8
Illegal Dumps Or Other Inappropriate Waste Disposal	Spills/Dumping	.6
Wet Weather Discharges (Non-Point Source)	Urban-Related Runoff/Stormwater	.6

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

Description of this table Assessed Status Acres Assessed 969,175.0 Unassessed 31,238.0 Total Acres 1,000,413.0

Description of this table Attainment Status Acres Good 891,917.0 Threatened .0 Impaired 77,258.0 Total Acres Assessed 969,175.0

Description of this table TMDL Development Status Acres All TMDLs completed 9,517.0 TMDL alternative .0 Non-pollutant impairment 48,964.0 TMDL needed 18,777.0 Total Threatened and Impaired 77,258.0

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Maine 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
Drinking Water Supply After Disinfection	969,175.0	100.0	.0	.0
Fish And Other Aquatic Life	372,701.0	79.3	.0	20.7
Fish Consumption	969,175.0	100.0	.0	.0
Fishing	969,175.0	100.0	.0	.0
Hydroelectric Power Generation	969,175.0	100.0	.0	.0
Industrial Process And Cooling Water Supply	969,175.0	100.0	.0	.0
Navigation	969,175.0	100.0	.0	.0
Primary Contact Recreation	969,175.0	97.5	.0	2.5
Secondary Contact Recreation	969,175.0	100.0	.0	.0

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Maine 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
Habitat Assessment (Lakes)	Cause Unknown - Impaired Biota	48,964.0
Phosphorus, Total	Nutrients	28,294.0
Secchi Disk Transparency	Turbidity	27,660.0
Turbidity	Turbidity	7,865.0
Dissolved Oxygen	Organic Enrichment/Oxygen Depletion	634.0

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Maine 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
Impacts From Hydrostructure Flow Regulation/Modification	Hydromodification	48,964.0
Rural (Residential Areas)	Other	22,580.0
Internal Nutrient Recycling	Natural/Wildlife	11,490.0
Non-Irrigated Crop Production	Agriculture	10,532.0
Natural Sources	Natural/Wildlife	10,195.0
Crop Production (Crop Land Or Dry Land)	Agriculture	7,491.0
Residential Districts	Urban-Related Runoff/Stormwater	5,119.0
Livestock (Grazing Or Feeding Operations)	Agriculture	5,093.0
Municipal Point Source Discharges	Municipal Dishcarges/Sewage	4,288.0
Unspecified Urban Stormwater	Urban-Related Runoff/Stormwater	3,296.0
Unspecified Unpaved Road Or Trail	Urban-Related Runoff/Stormwater	3,296.0
Industrial Land Treatment	Industrial	1,820.0
Upstream/Downstream Source	Other	83.0
Flow Alterations From Water Diversions	Hydromodification	30.0
Landfills	Land Application/Waste Sites/Tanks	29.0

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Maine 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)
Algal Growth	8.2
Ammonia	29.4
Cause Unknown	.6
Cause Unknown - Impaired Biota	221.5	48,964.0
Dioxins	381.0
Flow Alteration(s)	32.2
Metals (other than Mercury)	29.9
Nutrients	162.9	28,294.0
Organic Enrichment/Oxygen Depletion	367.7	634.0
Pathogens	203.9
Pesticides	217.4
pH/Acidity/Caustic Conditions	1.0
Polychlorinated Biphenyls (PCBs)	391.8
Toxic Organics	7.7
Turbidity	8.2	35,525.0

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Maine 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)
Agriculture	329.6	23,116.0
Aquaculture	9.1
Habitat Alterations (Not Directly Related To Hydromodification)	25.8
Hydromodification	139.6	48,994.0
Industrial	79.5	1,820.0
Land Application/Waste Sites/Tanks		29.0
Municipal Dishcarges/Sewage	94.0	4,288.0
Natural/Wildlife		21,639.0
Other	34.2	22,663.0
Resource Extraction	3.0
Spills/Dumping	14.5
Unknown	.8
Unspecified Nonpoint Source	96.2
Urban-Related Runoff/Stormwater	35.7	5,119.0

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Maine 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)
Dioxin (Including 2,3,7,8-TCDD)	21	309
Benthic Macroinvertebrates Bioassessments	7	35
Polychlorinated Biphenyls (PCBs)	4	47
Ammonia, Un-ionized	1	1
Benzene	1	5
Dissolved Oxygen	1	6
Nitrogen, Total	1	4

Total: 36 TMDL Alternatives

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Maine 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
2008	1	1

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Maine 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
Pathogens	111
Cause Unknown - Impaired Biota	59
Organic Enrichment/Oxygen Depletion	47
Polychlorinated Biphenyls (PCBs)	25
Nutrients	11
Dioxins	6
Pesticides	6
Turbidity	4
Metals (other than Mercury)	2
Toxic Organics	1
Cause Unknown	1
Algal Growth	1
pH/Acidity/Caustic Conditions	1

Total: 275 Causes of Impairment

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Maine 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
Fecal Coliform	143	143
Escherichia Coli (E. Coli)	62	62
Phosphorus, Total	43	47
Lead	6	6
Zinc	6	6
Biochemical Oxygen Demand (BOD)	5	5
NH3	4	4
Copper	3	3
Pollutants in Urban Stormwater	3	3
Total Suspended Solids (TSS)	3	5
Cadmium	2	2
Iron	2	2
Aluminum	1	1
Arsenic	1	1
Carbonaceous Bod	1	3
Chromium	1	1
Nickel	1	1
Nitrogen, Total	1	1
Orthophosphorus	1	3
Sediment	1	1
Selenium	1	1
Silver	1	1

Total: 292 TMDLs; 302 Causes of Impairment Addressed

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Maine 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
1999	2	2
2000	11	11
2001	12	12
2002	2	2
2003	12	12
2004	7	7
2005	19	27
2006	6	8
2007	11	11
2008	5	5
2009	205	205

Total: 292 TMDLs; 302 Causes of Impairment Addressed

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