Orange County Water Atlas


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Metadata Summary: EPA Impaired Waters & TMDL Data


Dataset Type: GIS/Spatial Data
Name of Data Source: EPA Impaired Waters & TMDL Data
Number of Water Resources Sampled: Unknown
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
Data Current on Atlas as of: 10/23/2017

Disclaimer/Use Constraints: Not Available

Custodian Information:
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: http://www2.epa.gov/aboutepa/about-office-water#wetlands
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