Virginia Impaired Waters and TMDL Information

Return to home page

On This Page

Data are also available for these cycles:
2002 2004 2006 2008 2010

For More Information:

Download Excel compatible information

Assessed Waters of Virginia by Watershed

Search for a waterbody within Virginia

Year Attaining	Number of Waters Attaining	Number of Causes of Impairment Addressed
NOTE: Click on the underlined "Number of Waters Attaining" value for a detailed list of those previously 303(d)-listed waters now attaining all applicable water quality standards.
2009	13	21
2011	81	98

Cause of Impairment Group Name	Number of Causes of Impairment Reported
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.
Fish Consumption Advisory	302
Pathogens	245
Ammonia	209
Cause Unknown - Impaired Biota	133
Organic Enrichment/Oxygen Depletion	98
pH/Acidity/Caustic Conditions	43
Nutrients	38
Metals (other than Mercury)	35
Polychlorinated Biphenyls (PCBs)	21
Pesticides	18
Toxic Organics	13
Temperature	7
Mercury	7
Toxic Inorganics	6
Total Toxics	4
Chlorine	4
Salinity/Total Dissolved Solids/Chlorides/Sulfates	1
Dioxins	1
Algal Growth	1

Total: 1,186 Causes of Impairment

This chart includes TMDLs since October 1, 1995.

Pollutant	Number of TMDLs	Number of Causes of Impairment Addressed
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.
Fecal Coliform	332	333
Escherichia Coli (E. Coli)	251	267
Ammonia	147	147
Pathogens	108	110
Sediment	89	89
Polychlorinated Biphenyls (PCBs)	77	77
Nitrogen, Total	43	43
Phosphorus, Total	43	43
Total Suspended Solids (TSS)	36	36
Enterococcus Bacteria	31	31
Mercury	26	26
Phosphorus	19	21
Total Dissolved Solids (TDS)	18	18
Dissolved Oxygen	16	16
Total Kjehldahl Nitrogen (TKN)	13	13
Carbonaceous Bod	10	10
Benthic	9	9
Copper	8	8
Tributyltin	8	8
Temperature	7	7
Cyanide	6	6
Organic Enrichment	6	6
Polycyclic Aromatic Hydrocarbons (PAHs) (Aquatic Ecosystems)	6	6
Zinc	6	6
Biochemical Oxygen Demand (BOD)	4	4
Chlorine	4	4
Fecal	4	5
Nitrogen	4	4
Pentachlorophenol (PCP)	4	4
Pollutants in Urban Stormwater	4	6
Whole Effluent Toxicity (WET)	4	4
Chlorides	3	3
Fecal Bacteria	3	5
PCBs in Sediment	3	3
Total Residual Chlorine	3	3
pH	3	3
Benzene	2	2
Di-2-Ethylhexyl Phthalate	2	2
Lead	2	2
Nitrate	2	2
Shellfish Harvesting Advisory	2	2
Silver	2	2
Aldrin	1	1
Alkalinity	1	1
Aluminum	1	1
Arsenic	1	1
Bacterial Slimes	1	1
Cadmium	1	1
Chloride	1	1
Chlorine, Residual (Chlorine Demand)	1	1
Chloroform	1	1
Chromium, Hexavalent	1	1
Chromium, Total	1	1
DDT	1	1
Dioxin	1	1
Eldrin	1	1
Endrin	1	1
Ethylbenzene	1	1
Manganese	1	1
Metals (other than Mercury)	1	1
Naphthalene	1	1
Nickel	1	1
Organic Enrichment/Low Dissolved Oxygen	1	1
Toluene	1	1
Xylene	1	1

Total: 1,393 TMDLs; 1,419 Causes of Impairment Addressed

EPA Fiscal Year starts October 1 and ends September 30.

Fiscal Year	Number of TMDLs	Number of Causes of Impairment Addressed
NOTE: Click on the underlined "Number of TMDLs Completed" value for a detailed list of the TMDLs for the fiscal year.
1998	4	4
1999	1	1
2000	1	1
2001	26	26
2002	180	180
2003	96	96
2004	118	118
2005	17	17
2006	219	220
2007	64	66
2008	138	138
2009	87	87
2010	199	209
2011	198	202
2012	33	34
2013	12	20

Total: 1,393 TMDLs; 1,419 Causes of Impairment Addressed