Metadata Summary

EPA Impaired Waters & TMDL Data

Datasource Information

Dataset TypeGIS/Spatial Data
Name of Data SourceEPA Impaired Waters & TMDL Data
Datasource Abbreviation (dataset)EPA_IMPAIRED
Description of DatasourceUnder 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 AtlasManual transfer via HTTP
How Often Data is Transferred to the AtlasAnnually
Date of Most Recent Data Transfer10/23/2017
Disclaimer/Use ConstraintsNot Available

Custodian Information

Agency Name US Environmental Protection Agency
Office of Wetlands, Oceans, and Watersheds
Contact NameTom Wall, Director
Contact Phone202-564-4179
Contact Email
Contact URL