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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
- TMDLs for Indian Country Waters by Fiscal Year
Data are also available for these cycles:
2002
2004
2008
Waterbody Changes from Prior Cycle
For More Information:
Washington Impaired Waters and TMDL Information
Assessed Waters of Washington by Watershed
Search for a waterbody within Washington
NOTE: This data is based on the approval by EPA of the 2006/2008 303(d) list, dated January 29, 2009.
NOTE: This data is based on the approval by EPA of the 2006/2008 303(d) list, dated January 29, 2009.
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Washington 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.
Washington 2006 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 |
|---|---|
| Temperature |  988 |
| Pathogens | 953 |
| Organic Enrichment/Oxygen Depletion | 731 |
| pH/Acidity/Caustic Conditions | 294 |
| Pesticides | 228 |
| Polychlorinated Biphenyls (PCBs) | 146 |
| Toxic Organics | 135 |
| Metals (other than Mercury) | 68 |
| Dioxins | 62 |
| Nutrients | 50 |
| Other Cause | 43 |
| Mercury | 30 |
| Total Toxics | 26 |
| Turbidity | 19 |
| Ammonia | 14 |
| Cause Unknown - Impaired Biota | 13 |
| Sediment | 9 |
| Chlorine | 3 |
Total: 3,812 Causes of Impairment
Washington 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 |  574 |
574 |
| Temperature | 458 |
459 |
| Dissolved Oxygen | 54 |
54 |
| Total Dissolved Gas | 46 |
46 |
| Ammonia Nitrogen | 45 |
45 |
| Riparian Shade | 39 |
39 |
| Turbidity | 31 |
31 |
| Carbonaceous Bod | 27 |
27 |
| Phosphorus | 24 |
24 |
| Biochemical Oxygen Demand (BOD) | 22 |
22 |
| DDT | 22 |
28 |
| Inorganic Nitrogen | 21 |
21 |
| Suspended Sediment | 20 |
27 |
| Phosphorus, Total | 9 |
9 |
| Sediment | 9 |
9 |
| pH | 9 |
9 |
| 4,4'-DDE | 7 |
7 |
| Zinc | 6 |
6 |
| Ammonia | 5 |
5 |
| Arsenic | 5 |
5 |
| Dieldrin | 5 |
5 |
| Lead | 4 |
4 |
| Mercury | 4 |
4 |
| 4,4'-DDD | 3 |
3 |
| Polychlorinated Biphenyls (PCBs) | 3 |
3 |
| Total PCBs | 3 |
3 |
| 4,4'-DDT | 2 |
2 |
| Chlorine | 2 |
2 |
| Copper | 2 |
2 |
| 4-Methylphenol | 1 |
1 |
| Cadmium | 1 |
1 |
| Fecal | 1 |
1 |
| Large Woody Debris | 1 |
1 |
| PCB-1260 | 1 |
1 |
| Phenol | 1 |
1 |
| Sediment Bioassay | 1 |
1 |
Total: 1,468 TMDLs; 1,482 Causes of Impairment Addressed
Washington 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 |
|---|---|---|
| 1996 | 51 |
51 |
| 1997 | 51 |
51 |
| 1999 | 24 |
24 |
| 2000 | 96 |
96 |
| 2001 | 23 |
24 |
| 2002 | 82 |
82 |
| 2003 | 108 |
108 |
| 2004 | 70 |
70 |
| 2005 | 196 |
196 |
| 2006 | 66 |
73 |
| 2007 | 244 |
250 |
| 2008 | 46 |
46 |
| 2009 | 62 |
62 |
| 2010 | 87 |
87 |
| 2011 | 158 |
158 |
| 2012 | 104 |
104 |
Total: 1,468 TMDLs; 1,482 Causes of Impairment Addressed
Washington Cumulative Number of TMDLs for Indian Country Waters
EPA Fiscal Year starts October 1 and ends September 30.
Description of this table
| NOTE:Click on the underlined "Number of TMDLs" value for a detailed list of the TMDLs for the fiscal year. | ||
| Fiscal Year | Number of TMDLs | Number of Causes of Impairment Addressed |
|---|---|---|
| 2004 | 6 |
17 |
Total: 6 TMDLs; 0 Causes of Impairment