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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
2006
2008
2010
Waterbody Changes from Prior Cycle
For More Information:
Idaho Impaired Waters and TMDL Information
Assessed Waters of Idaho by Watershed
Search for a waterbody within Idaho
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Idaho Previously 303(d)-Listed Waters Now Attaining All Applicable Water Quality Standards
Description of this table| 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. | ||
| Year Attaining | Number of Waters Attaining | Number of Causes of Impairment Addressed |
|---|---|---|
| 2009 |  26 |
33 |
| 2011 | 15 |
22 |
Idaho 1998 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 |
|---|---|
| Sediment |  565 |
| Temperature | 253 |
| Nutrients | 227 |
| Pathogens | 124 |
| Cause Unknown | 109 |
| Flow Alteration(s) | 108 |
| Organic Enrichment/Oxygen Depletion | 76 |
| Habitat Alterations | 70 |
| Metals (other than Mercury) | 43 |
| Oil and Grease | 14 |
| Ammonia | 13 |
| Turbidity | 12 |
| pH/Acidity/Caustic Conditions | 12 |
| Pesticides | 11 |
| Other Cause | 8 |
| Toxic Organics | 6 |
| Mercury | 3 |
| Salinity/Total Dissolved Solids/Chlorides/Sulfates | 1 |
Total: 1,655 Causes of Impairment
Idaho 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 |
|---|---|---|
| Temperature |  656 |
658 |
| Sediment | 400 |
400 |
| Total Suspended Solids (TSS) | 159 |
159 |
| Phosphorus, Total | 124 |
132 |
| Nutrients | 111 |
111 |
| Phosphorus | 92 |
96 |
| Escherichia Coli (E. Coli) | 65 |
65 |
| Cadmium | 60 |
60 |
| Zinc | 60 |
60 |
| Lead | 57 |
57 |
| Bacteria | 50 |
50 |
| Dissolved Oxygen | 26 |
26 |
| Pathogens | 18 |
18 |
| Enterococcus Bacteria | 10 |
10 |
| Total Dissolved Gas | 6 |
6 |
| DDD | 5 |
5 |
| DDE | 5 |
5 |
| DDT | 5 |
5 |
| Dieldrin | 5 |
5 |
| Nitrite/Nitrate | 5 |
5 |
| Suspended Sediment | 5 |
5 |
| Erosion | 4 |
4 |
| Nitrogen, Total | 4 |
4 |
| Ammonia | 3 |
3 |
| Copper | 3 |
3 |
| Nitrogen | 3 |
3 |
| Oil and Grease | 2 |
2 |
| Total Inorganic Nitrogen | 2 |
2 |
| Turbidity | 2 |
2 |
| Chlorophyll-A | 1 |
1 |
| Mercury | 1 |
1 |
Total: 1,949 TMDLs; 1,963 Causes of Impairment Addressed
Idaho 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 | 4 |
4 |
| 1997 | 14 |
14 |
| 1998 | 5 |
5 |
| 1999 | 19 |
21 |
| 2000 | 375 |
375 |
| 2001 | 72 |
75 |
| 2002 | 82 |
82 |
| 2003 | 120 |
120 |
| 2004 | 240 |
242 |
| 2005 | 160 |
160 |
| 2006 | 146 |
150 |
| 2007 | 50 |
50 |
| 2008 | 232 |
232 |
| 2009 | 93 |
93 |
| 2010 | 84 |
84 |
| 2011 | 36 |
37 |
| 2012 | 183 |
183 |
| 2013 | 34 |
36 |
Total: 1,949 TMDLs; 1,963 Causes of Impairment Addressed
Idaho 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 |
|---|---|---|
| 1999 | 9 |
9 |
| 2000 | 124 |
124 |
| 2004 | 11 |
17 |
| 2005 | 1 |
10 |
| 2011 | 1 |
1 |
| 2012 | 36 |
36 |
Total: 182 TMDLs; 0 Causes of Impairment