Skip to content
EPA Environmental Dataset Gateway
EPA Office of Water (OW): 2002 Impaired Waters Baseline NHDPlus Indexed Dataset
US Environmental Protection Agency, Office of Water
This dataset consists of geospatial and attribute data identifying the spatial extent of state-reported impaired waters (EPA's Integrated Reporting categories 4a, 4b, 4c and 5)* available in EPA's Reach Address Database (RAD) at the time of extraction. For the 2002 baseline reporting year, EPA compiled state-submitted GIS data to create a seamless and nationally consistent picture of the Nation's impaired waters for measuring progress. EPA's Assessment and TMDL Tracking and Implementation System (ATTAINS) is a national compilation of states' 303(d) listings and TMDL development information, spanning several years of tracking over 40,000 impaired waters.
ATTAINS impaired waters data are publicly available online in tabular format (www.epa.gov/waters/ir).
Time Period of Content
West Bounding Longitude:
East Bounding Longitude:
North Bounding Latitude:
South Bounding Latitude:
impaired waters, 303d, TMDL, clean water act, map service, waters10, listed waters, shapefile, total maximum daily loads, TMDLs, feature service, CWA, point source, GIS, EPA, Stream, reach
Although these data have been processed successfully on a computer system at the Environmental Protection Agency, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate data set limitations, restrictions or intended use. The U.S. Environmental Protection Agency shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Metadata Reference Information
Metadata Standard Name:
FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version:
The EDG is a metadata portal that is part of
EPA's System of Registries
. Please read EPA's
Privacy and Security Notice
Access EPA's National Geospatial Home Page
Access EPA's Intranet Geospatial Home Page