| Dataset Type | GIS/Spatial Data |
|---|---|
| Name of Data Source | EPA Impaired Waters & TMDL Data |
| Number of Water Resources Sampled | Not Available |
| Datasource Abbreviation (dataset) | EPA_IMPAIRED |
| Description of Datasource | Under section 303(d) of the Clean Water Act, states, territories, and authorized tribes are required to develop lists of impaired waters. These are waters that are too polluted or otherwise degraded to meet the water quality standards set by states, territories, or authorized tribes. The law requires that these jurisdictions establish priority rankings for waters on the lists and develop TMDLs for these waters. A Total Maximum Daily Load, or TMDL, is a calculation of the maximum amount of a pollutant that a waterbody can receive and still safely meet water quality standards. |
| Method of Transferring Data to the Atlas | Manual transfer via HTTP |
| How Often Data is Transferred to the Atlas | Annually |
| Date of Most Recent Data Transfer | 10/23/2017 |
| Disclaimer/Use Constraints | Not Available |
| Agency Name |
US Environmental Protection Agency Office of Wetlands, Oceans, and Watersheds |
|---|---|
| Contact Name | Tom Wall, Director |
| Contact Phone | 202-564-4179 |
| Contact E-mail | wall.tom@epa.gov |
| Contact URL | https://www.epa.gov/aboutepa/about-office-water#wetlands |
