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On This Page 303(d) Listed Waters for 2010

Data are also available for these cycles:
2002 2004 2006 2008

Waterbody Changes from Prior Cycle

For More Information:

District Of Columbia Assessment Report Exit EPA Disclaimer
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District Of Columbia Water Quality Assessment Report

Assessed Waters of District Of Columbia by Watershed

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Display impaired waters and TMDL information only



Site-specific Targeted Monitoring Summary Results

District Of Columbia (2010)

Description of this table
 
   
      
   
                     
                     
                     
                     
    38.4 238.4 5.9
                     
                     
                     
           38.4     238.4     5.9
              .0     .0     .0
                    38.4           238.4           5.9
38.4 238.4 5.9
39.0 238.4 6.0
98.5 100.0 98.8

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Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2010


Site-specific Targeted Monitoring Results

District Of Columbia Rivers and Streams 2010

Description of this table

All
Rivers and Streams

39.0 Miles of Rivers and Streams

Assessed 38.4
Unassessed .6
Total Miles 39.0







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Description of this table

Assessed
Rivers and Streams

38.4 Miles of
Assessed Rivers and Streams

Good .0
Threatened .0
Impaired 38.4
Total Miles Assessed 38.4







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Description of this table

Threatened and Impaired
Rivers and Streams

38.4 Miles of
Threatened and Impaired
Rivers and Streams

.0
.0
.0
38.4
Total Threatened and Impaired 38.4

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
District Of Columbia Rivers and Streams 2010

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table
% Good
% Threatened
% Impaired
Navigation 9.5 100.0 .0 .0 color.gif
Protection And Propagation Of Fish, Shellfish And Wildlife 34.1 .0 .0 100.0 color.gif
Protection Of Human Health Related To Consumption Of Fish And Shellfish 38.4 .0 .0 100.0 color.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
District Of Columbia Rivers and Streams 2010

Description of this table
Cause Unknown Cause Unknown color.gif 38.4
Combination Benthic/Fishes Bioassessments Cause Unknown - Impaired Biota color.gif 31.0
Particle Distribution (Embeddedness) Sediment color.gif 24.9
Other Flow Regime Alterations Flow Alteration(s) color.gif 16.5
Debris/Floatables/Trash Trash color.gif 13.5
Combined Biota/Habitat Bioassessments (Streams) Cause Unknown - Impaired Biota color.gif 11.6
Alterations in Wetland Habitats Habitat Alterations color.gif 4.8
Benthic Macroinvertebrates Bioassessments Cause Unknown - Impaired Biota color.gif 4.5
Fish Bioassessments Cause Unknown - Impaired Biota color.gif 3.9
Alteration in Stream-Side or Littoral Vegetative Covers Habitat Alterations color.gif 3.7
Total Suspended Solids (TSS) Turbidity color.gif 3.7
Habitat Assessment (Streams) Cause Unknown - Impaired Biota color.gif 1.0
Physical Substrate Habitat Alterations Habitat Alterations color.gif .7
Oil and Grease Oil and Grease color.gif .6

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Site-specific Targeted Monitoring Results

Probable Sources
District Of Columbia Rivers and Streams 2010

Description of this table
Residential Districts Urban-Related Runoff/Stormwater color.gif 27.8
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso) Municipal Discharges/Sewage color.gif 17.0
Wet Weather Discharges (Non-Point Source) Urban-Related Runoff/Stormwater color.gif 17.0
Hydrostructure Impacts On Fish Passage Hydromodification color.gif 14.0
Yard Maintenance Urban-Related Runoff/Stormwater color.gif 13.9
Illegal Dumps Or Other Inappropriate Waste Disposal Spills/Dumping color.gif 11.4
Impacts From Hydrostructure Flow Regulation/Modification Hydromodification color.gif 10.8
Illegal Dumping Spills/Dumping color.gif 9.9
Post-Development Erosion And Sedimentation Hydromodification color.gif 8.5
Channelization Hydromodification color.gif 5.6
Site Clearance (Land Development Or Redevelopment) Construction color.gif 5.3
Cercla Npl (Superfund) Sites Legacy/Historical Pollutants color.gif 1.6
Municipal (Urbanized High Density Area) Urban-Related Runoff/Stormwater color.gif 1.4
Loss Of Riparian Habitat Habitat Alterations (Not Directly Related To Hydromodification) color.gif 1.2
Discharges From Municipal Separate Storm Sewer Systems (Ms4) Urban-Related Runoff/Stormwater color.gif 1.0
Landfills Land Application/Waste Sites/Tanks color.gif .6
Source Unknown Unknown color.gif .6

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Site-specific Targeted Monitoring Results

District Of Columbia Lakes, Reservoirs, and Ponds 2010

Description of this table

All
Lakes, Reservoirs, and Ponds

238.4 Acres of Lakes, Reservoirs, and Ponds

Assessed 238.4
Unassessed .0
Total Acres 238.4







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Description of this table

Assessed
Lakes, Reservoirs, and Ponds

238.4 Acres of
Assessed Lakes, Reservoirs, and Ponds

Good .0
Threatened .0
Impaired 238.4
Total Acres Assessed 238.4







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Description of this table

Threatened and Impaired
Lakes, Reservoirs, and Ponds

238.4 Acres of
Threatened and Impaired
Lakes, Reservoirs, and Ponds

.0
.0
.0
238.4
Total Threatened and Impaired 238.4

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
District Of Columbia 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
% Good
% Threatened
% Impaired
Navigation 238.4 100.0 .0 .0 color.gif
Protection And Propagation Of Fish, Shellfish And Wildlife 238.4 .0 .0 100.0 color.gif
Protection Of Human Health Related To Consumption Of Fish And Shellfish 238.4 .0 .0 100.0 color.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
District Of Columbia Lakes, Reservoirs, and Ponds 2010

Description of this table
Cause Unknown Cause Unknown color.gif 238.4
pH pH/Acidity/Caustic Conditions color.gif 135.7
Dissolved Oxygen Saturation Organic Enrichment/Oxygen Depletion color.gif 102.7

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Site-specific Targeted Monitoring Results

Probable Sources
District Of Columbia Lakes, Reservoirs, and Ponds 2010

No probable sources of impairments reported.

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Site-specific Targeted Monitoring Results

District Of Columbia Bays and Estuaries 2010

Description of this table

All
Bays and Estuaries

6.0 Square Miles of Bays and Estuaries

Assessed 5.9
Unassessed .1
Total Square Miles 6.0







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Description of this table

Assessed
Bays and Estuaries

5.9 Square Miles of
Assessed Bays and Estuaries

Good .0
Threatened .0
Impaired 5.9
Total Square Miles Assessed 5.9







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Description of this table

Threatened and Impaired
Bays and Estuaries

5.9 Square Miles of
Threatened and Impaired
Bays and Estuaries

.0
.0
.0
5.9
Total Threatened and Impaired 5.9

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
District Of Columbia Bays and Estuaries 2010

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table
% Good
% Threatened
% Impaired
Navigation 5.9 100.0 .0 .0 color.gif
Protection And Propagation Of Fish, Shellfish And Wildlife 5.9 70.0 .0 30.0 color.gifcolor.gif
Protection Of Human Health Related To Consumption Of Fish And Shellfish 5.9 .0 .0 100.0 color.gif
Secondary Contact Recreation And Aesthetic Enjoyment .8 .0 .0 100.0 color.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
District Of Columbia Bays and Estuaries 2010

Description of this table
Cause Unknown Cause Unknown color.gif 5.6
Debris/Floatables/Trash Trash color.gif .8
Biochemical Oxygen Demand (BOD) Organic Enrichment/Oxygen Depletion color.gif .3

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Site-specific Targeted Monitoring Results

Probable Sources
District Of Columbia Bays and Estuaries 2010

No probable sources of impairments reported.

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District Of Columbia 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.
Size of Assessed Waters with Listed Causes of Impairment
Cause Unknown 38.4 238.4 5.6
Cause Unknown - Impaired Biota 31.0
Flow Alteration(s) 16.5
Habitat Alterations 9.2
Oil and Grease .6
Organic Enrichment/Oxygen Depletion 102.7 .3
pH/Acidity/Caustic Conditions 135.7
Sediment 24.9
Trash 13.5 .8
Turbidity 3.7

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District Of Columbia 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.
Size of Assessed Waters with Probable Sources of Impairments
Construction 5.3
Habitat Alterations (Not Directly Related To Hydromodification) 1.2
Hydromodification 24.0
Land Application/Waste Sites/Tanks .6
Legacy/Historical Pollutants 1.6
Municipal Discharges/Sewage 17.0
Spills/Dumping 11.4
Unknown .6
Urban-Related Runoff/Stormwater 30.4

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District Of Columbia TMDL Alternatives by Cause of Impairment 2010


No TMDL Alternatives reported.

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District Of Columbia Previously 303(d)-Listed Waters Now Attaining All Applicable Water Quality Standards


No previously 303(d)-listed waters reported as now attaining all applicable water quality standards.

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District Of Columbia 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 Unknown - Impaired Biota color.gif 37
Cause Unknown color.gif 35
Sediment color.gif 15
Other Cause color.gif 13
Flow Alteration(s) color.gif 9
Habitat Alterations color.gif 9
pH/Acidity/Caustic Conditions color.gif 2
Organic Enrichment/Oxygen Depletion color.gif 2
Oil and Grease color.gif 1

Total: 123 Causes of Impairment

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District Of Columbia 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.
Number of Causes of
Impairment Addressed
DDT color.gif 25 25
Dieldrin color.gif 25 25
Heptachlor Epoxide color.gif 25 25
PAH1 - 2 & 3 Ring Polycyclic Aromatic Hydrocarbons color.gif 25 25
PAH2 - 4 Ring Polycyclic Aromatic Hydrocarbons color.gif 25 25
PAH3 - 5 && Ring Polycyclic Aromatic Hydrocarbons color.gif 25 25
Chlordane color.gif 24 24
DDE color.gif 24 24
DDD color.gif 23 23
Fecal Coliform color.gif 23 23
Polychlorinated Biphenyls (PCBs) color.gif 19 19
Copper color.gif 16 16
Lead color.gif 16 16
Zinc color.gif 16 16
Arsenic color.gif 14 14
Pathogens color.gif 9 9
Biochemical Oxygen Demand (BOD) color.gif 6 6
Suspended Solids color.gif 5 5
Oil and Grease color.gif 4 4
Suspended Sediment color.gif 4 4
Nitrogen color.gif 3 3
Phosphorus color.gif 3 3
Mercury color.gif 2 2
Total Suspended Solids (TSS) color.gif 2 2
Toxics color.gif 2 2
Trash color.gif 2 2
pH color.gif 2 2
Nitrogen, Total color.gif 1 1
Phosphorus, Total color.gif 1 1

Total: 371 TMDLs; 371 Causes of Impairment Addressed


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District Of Columbia 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.
1999 color.gif 1 1
2002 color.gif 7 7
2003 color.gif 129 129
2004 color.gif 151 151
2005 color.gif 60 60
2007 color.gif 2 2
2008 color.gif 11 11
2010 color.gif 2 2
2011 color.gif 6 6
2012 color.gif 2 2

Total: 371 TMDLs; 371 Causes of Impairment Addressed

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TMDL Document Search


Full Text Search of TMDL Documents

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