Dataset Type: GIS/Spatial Data
Name of Data Source: EPA Impaired Waters & TMDL Data
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.
How Often Data is Transferred to the Atlas: Annually
Period of Record Within the Atlas: 2002 - 2011
Date Added/Updated on Atlas: 10/26/2012
Disclaimer/Use Constraints: Not Available
US Environmental Protection Agency
Office of Wetlands, Oceans, and Watersheds
Contact Name: Tom Wall, Director
Contact Email: firstname.lastname@example.org
Contact URL: Click here to contact this data provider .