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Map Layer Info

EPA Envirofacts Data - Water Discharge Permits

What this map layer shows:

The locations of more than 101,000 sites that discharge waste water to United States waters.
opens the U.S. Environmental Protection Agency home page
Background Information
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Water pollution can make surface water unsafe for drinking, fishing, swimming, and other activities. As authorized by the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) permit program controls water pollution by regulating sources, such as municipal and industrial waste-water treatment facilities, that discharge pollutants into waters of the United States. The U.S. Environmental Protection Agency (EPA) supervises NPDES, although individual States perform many of the permitting, administrative, and enforcement aspects of the NPDES program. The EPA also tracks water discharge permits through the Permit Compliance System (PCS), which includes information on when a permit was issued and when it expires, how much the company is permitted to discharge, and the actual monitoring data showing what the company has discharged. This map layer was produced by the EPA.

The EPA Envirofacts Data - Water Discharge Permits map layer shows locations of more than 101,000 sites in the United States, Puerto Rico, and the U.S. Virgin Islands that discharge waste water into United States waters as of May, 2005. Descriptive information includes the facility name and identification number. More detailed information on water discharge permits is available from the NPDES Permit Program Basics page, and definitions of environmental terms can be found in the EPA Terms of Environment.


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Water Discharge Permits