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 (2014)

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 2014


Site-specific Targeted Monitoring Results

District Of Columbia Rivers and Streams 2014

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 2014

* 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
Primary Contact Recreation 38.4 .0 .0 100.0 color.gif
Protection And Propagation Of Fish, Shellfish And Wildlife 38.4 .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
Secondary Contact Recreation And Aesthetic Enjoyment 38.4 47.1 .0 52.9 color.gifcolor.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
District Of Columbia Rivers and Streams 2014

Description of this table
Polychlorinated Biphenyls (PCBs) Polychlorinated Biphenyls (PCBs) color.gif 38.4
Fecal Coliform Pathogens color.gif 27.7
Zinc Metals (other than Mercury) color.gif 27.6
Copper Metals (other than Mercury) color.gif 27.6
Dieldrin Pesticides color.gif 21.9
Heptachlor Epoxide Pesticides color.gif 21.9
Arsenic Metals (other than Mercury) color.gif 21.6
Chlordane Pesticides color.gif 21.1
Polycyclic Aromatic Hydrocarbons (PAHs) (Aquatic Ecosystems) Toxic Organics color.gif 20.7
Turbidity Turbidity color.gif 20.3
DDT Pesticides color.gif 19.4
DDD Pesticides color.gif 16.2
DDE Pesticides color.gif 16.2
Total Suspended Solids (TSS) Turbidity color.gif 12.8
Escherichia Coli (E. Coli) Pathogens color.gif 10.7
Lead Metals (other than Mercury) color.gif 9.5
Mercury Mercury color.gif 9.5
Other Flow Regime Alterations Flow Alteration(s) color.gif 9.1
pH pH/Acidity/Caustic Conditions color.gif 5.9
Alteration in Stream-Side or Littoral Vegetative Covers Habitat Alterations color.gif 3.1
Dissolved Oxygen Saturation Organic Enrichment/Oxygen Depletion color.gif 3.0
Biochemical Oxygen Demand (BOD) Organic Enrichment/Oxygen Depletion color.gif 1.4
Chlorine, Residual (Chlorine Demand) Chlorine color.gif .9
Physical Substrate Habitat Alterations Habitat Alterations color.gif .6
Particle Distribution (Embeddedness) Sediment color.gif .2

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Site-specific Targeted Monitoring Results

Probable Sources
District Of Columbia Rivers and Streams 2014

Description of this table
Illegal Dumps Or Other Inappropriate Waste Disposal Spills/Dumping color.gif 5.7
Residential Districts Urban-Related Runoff/Stormwater color.gif 5.6
Wet Weather Discharges (Non-Point Source) Urban-Related Runoff/Stormwater color.gif 4.8
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso) Municipal Discharges/Sewage color.gif 4.8
Impacts From Hydrostructure Flow Regulation/Modification Hydromodification color.gif 4.4
Site Clearance (Land Development Or Redevelopment) Construction color.gif 4.0
Channelization Hydromodification color.gif 1.3
Discharges From Municipal Separate Storm Sewer Systems (Ms4) Urban-Related Runoff/Stormwater color.gif 1.0
Municipal (Urbanized High Density Area) Urban-Related Runoff/Stormwater color.gif .9
Hydrostructure Impacts On Fish Passage Hydromodification color.gif .8
Yard Maintenance Urban-Related Runoff/Stormwater color.gif .8
Loss Of Riparian Habitat Habitat Alterations (Not Directly Related To Hydromodification) color.gif .2

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Site-specific Targeted Monitoring Results

District Of Columbia Lakes, Reservoirs, and Ponds 2014

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 2014

* 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
Primary Contact Recreation 238.4 .0 .0 100.0 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
Secondary Contact Recreation And Aesthetic Enjoyment 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 2014

Description of this table
Polychlorinated Biphenyls (PCBs) Polychlorinated Biphenyls (PCBs) color.gif 238.4
Fecal Coliform Pathogens color.gif 238.4
DDE Pesticides color.gif 211.1
Polycyclic Aromatic Hydrocarbons (PAHs) (Aquatic Ecosystems) Toxic Organics color.gif 211.1
Chlordane Pesticides color.gif 211.1
DDD Pesticides color.gif 211.1
DDT Pesticides color.gif 211.1
Heptachlor Epoxide Pesticides color.gif 211.1
Dieldrin Pesticides color.gif 211.1
pH pH/Acidity/Caustic Conditions color.gif 135.7
Zinc Metals (other than Mercury) color.gif 102.7
Copper Metals (other than Mercury) color.gif 102.7
Oil and Grease Oil and Grease color.gif 102.7
Turbidity Turbidity color.gif 102.7
Biochemical Oxygen Demand (BOD) Organic Enrichment/Oxygen Depletion color.gif 102.7
Arsenic Metals (other than Mercury) color.gif 102.7
Total Suspended Solids (TSS) Turbidity color.gif 102.7

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Site-specific Targeted Monitoring Results

Probable Sources
District Of Columbia Lakes, Reservoirs, and Ponds 2014

No probable sources of impairments reported.

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Site-specific Targeted Monitoring Results

District Of Columbia Bays and Estuaries 2014

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 2014

* 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
Primary Contact Recreation 5.9 .0 .0 100.0 color.gif
Protection And Propagation Of Fish, Shellfish And Wildlife 5.9 13.5 .0 86.5 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 5.9 5.1 .0 94.9 color.gifcolor.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
District Of Columbia Bays and Estuaries 2014

Description of this table
Polychlorinated Biphenyls (PCBs) Polychlorinated Biphenyls (PCBs) color.gif 5.9
Fecal Coliform Pathogens color.gif 5.9
Turbidity Turbidity color.gif 5.1
pH pH/Acidity/Caustic Conditions color.gif 2.1
DDE Pesticides color.gif 1.1
Polycyclic Aromatic Hydrocarbons (PAHs) (Aquatic Ecosystems) Toxic Organics color.gif 1.1
DDD Pesticides color.gif 1.1
DDT Pesticides color.gif 1.1
Heptachlor Epoxide Pesticides color.gif 1.1
Dieldrin Pesticides color.gif 1.1
Chlordane Pesticides color.gif 1.1
Debris/Floatables/Trash Trash color.gif .8
Zinc Metals (other than Mercury) color.gif .8
Copper Metals (other than Mercury) color.gif .8
Arsenic Metals (other than Mercury) color.gif .8
Total Suspended Solids (TSS) Turbidity color.gif .8
Phosphorus, Total Nutrients color.gif .7
Nitrogen, Total Nutrients color.gif .7
Biochemical Oxygen Demand (BOD) Organic Enrichment/Oxygen Depletion color.gif .3
Oil and Grease Oil and Grease color.gif .3
Dissolved Oxygen Saturation Organic Enrichment/Oxygen Depletion color.gif .3

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Site-specific Targeted Monitoring Results

Probable Sources
District Of Columbia Bays and Estuaries 2014

No probable sources of impairments reported.

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District Of Columbia Causes of Impairment for Reporting Year 2014


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, 557 K, About PDF) for brief, non-technical descriptions of general cause categories.
Size of Assessed Waters with Listed Causes of Impairment
Chlorine .9
Flow Alteration(s) 9.1
Habitat Alterations 3.7
Mercury 9.5
Metals (other than Mercury) 31.1 102.7 .8
Nutrients .7
Oil and Grease 102.7 .3
Organic Enrichment/Oxygen Depletion 3.0 102.7 .3
Pathogens 38.4 238.4 5.9
Pesticides 21.9 211.1 1.1
pH/Acidity/Caustic Conditions 5.9 135.7 2.1
Polychlorinated Biphenyls (PCBs) 38.4 238.4 5.9
Sediment .2
Toxic Organics 20.7 211.1 1.1
Trash .8
Turbidity 20.3 102.7 5.6

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District Of Columbia Probable Sources Contributing to Impairments
for Reporting Year 2014

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 4.0
Habitat Alterations (Not Directly Related To Hydromodification) .2
Hydromodification 4.7
Municipal Discharges/Sewage 4.8
Spills/Dumping 5.7
Urban-Related Runoff/Stormwater 7.5

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District Of Columbia TMDL Alternatives by Cause of Impairment 2014


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.
Pesticides color.gif 75
Metals (other than Mercury) color.gif 48
Turbidity color.gif 23
Polychlorinated Biphenyls (PCBs) color.gif 19
Toxic Organics color.gif 15
Pathogens color.gif 12
Organic Enrichment/Oxygen Depletion color.gif 5
pH/Acidity/Caustic Conditions color.gif 4
Chlorine color.gif 1

Total: 202 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
Escherichia Coli (E. Coli) color.gif 14 15
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: 385 TMDLs; 386 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
2014 color.gif 8 9
2015 color.gif 6 6

Total: 385 TMDLs; 386 Causes of Impairment Addressed

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TMDL Document Search


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