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- Previously 303(d)-Listed Waters Now Attaining All Applicable Water Quality Standards
- Causes of Impairment for 303(d) Listed Waters
- Cumulative TMDLs by Pollutant
- Cumulative Number of TMDLs
Data are also available for these cycles:
2004
2006
2008
2010
Waterbody Changes from Prior Cycle
For More Information:
District Of Columbia Assessment Report
State Water Quality Program
District Of Columbia Impaired Waters and TMDL Information
Assessed Waters of District Of Columbia by Watershed
Search for a waterbody within District Of Columbia
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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.
District Of Columbia 2002 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 |
|---|---|
| Toxic Organics |  37 |
| Pathogens | 35 |
| Metals (other than Mercury) | 18 |
| pH/Acidity/Caustic Conditions | 3 |
| Oil and Grease | 3 |
| Organic Enrichment/Oxygen Depletion | 3 |
| Dioxins | 3 |
| Chlorine | 3 |
| Total Toxics | 2 |
| Mercury | 1 |
| Turbidity | 1 |
Total: 109 Causes of Impairment
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. | ||
| Pollutant | Number of TMDLs | Number of Causes of Impairment Addressed |
|---|---|---|
| DDT |  25 |
25 |
| Dieldrin | 25 |
25 |
| Heptachlor Epoxide | 25 |
25 |
| PAH1 - 2 & 3 Ring Polycyclic Aromatic Hydrocarbons | 25 |
25 |
| PAH2 - 4 Ring Polycyclic Aromatic Hydrocarbons | 25 |
25 |
| PAH3 - 5 && Ring Polycyclic Aromatic Hydrocarbons | 25 |
25 |
| Chlordane | 24 |
24 |
| DDE | 24 |
24 |
| DDD | 23 |
23 |
| Fecal Coliform | 23 |
23 |
| Polychlorinated Biphenyls (PCBs) | 19 |
19 |
| Copper | 16 |
16 |
| Lead | 16 |
16 |
| Zinc | 16 |
16 |
| Arsenic | 14 |
14 |
| Pathogens | 9 |
9 |
| Biochemical Oxygen Demand (BOD) | 6 |
6 |
| Suspended Solids | 5 |
5 |
| Oil and Grease | 4 |
4 |
| Suspended Sediment | 4 |
4 |
| Nitrogen | 3 |
3 |
| Phosphorus | 3 |
3 |
| Mercury | 2 |
2 |
| Total Suspended Solids (TSS) | 2 |
2 |
| Toxics | 2 |
2 |
| Trash | 2 |
2 |
| pH | 2 |
2 |
| Nitrogen, Total | 1 |
1 |
| Phosphorus, Total | 1 |
1 |
Total: 371 TMDLs; 371 Causes of Impairment Addressed
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. | ||
| Fiscal Year | Number of TMDLs | Number of Causes of Impairment Addressed |
|---|---|---|
| 1999 | 1 |
1 |
| 2002 | 7 |
7 |
| 2003 | 129 |
129 |
| 2004 | 151 |
151 |
| 2005 | 60 |
60 |
| 2007 | 2 |
2 |
| 2008 | 11 |
11 |
| 2010 | 2 |
2 |
| 2011 | 6 |
6 |
| 2012 | 2 |
2 |
Total: 371 TMDLs; 371 Causes of Impairment Addressed