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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:
2002
2006
2008
2010
Waterbody Changes from Prior Cycle
For More Information:
Ohio Assessment Report
State Water Quality Program
Ohio Impaired Waters and TMDL Information
Assessed Waters of Ohio by Watershed
Search for a waterbody within Ohio
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- Pollution Categories Summary Document
Ohio 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 |
|---|---|---|
| 2004 |  5 |
6 |
| 2006 | 3 |
6 |
| 2008 | 1 |
5 |
Ohio 2004 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 |
|---|---|
| Habitat Alterations |  225 |
| Sediment | 221 |
| Flow Alteration(s) | 157 |
| Organic Enrichment/Oxygen Depletion | 148 |
| Pathogens | 146 |
| Nutrients | 145 |
| Metals (other than Mercury) | 81 |
| Polychlorinated Biphenyls (PCBs) | 75 |
| Cause Unknown | 69 |
| Ammonia | 42 |
| Total Toxics | 34 |
| pH/Acidity/Caustic Conditions | 33 |
| Turbidity | 29 |
| Other Cause | 18 |
| Toxic Organics | 18 |
| Temperature | 13 |
| Mercury | 10 |
| Oil and Grease | 10 |
| Salinity/Total Dissolved Solids/Chlorides/Sulfates | 9 |
| Pesticides | 6 |
| Chlorine | 4 |
| Nuisance Exotic Species | 3 |
| Toxic Inorganics | 3 |
| Noxious Aquatic Plants | 2 |
| Taste, Color and Odor | 1 |
Total: 1,502 Causes of Impairment
Ohio Cumulative TMDLs by Pollutant
This chart includes TMDLs since October 1, 1995.
Description of this tableTotal: 1,594 TMDLs; 2,280 Causes of Impairment Addressed
Ohio 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 |
|---|---|---|
| 2001 |  3 |
6 |
| 2002 | 24 |
60 |
| 2003 | 207 |
252 |
| 2004 | 116 |
163 |
| 2005 | 147 |
271 |
| 2006 | 109 |
208 |
| 2007 | 109 |
238 |
| 2008 | 103 |
184 |
| 2009 | 327 |
387 |
| 2010 | 196 |
226 |
| 2011 | 130 |
130 |
| 2012 | 123 |
130 |
Total: 1,594 TMDLs; 2,280 Causes of Impairment Addressed