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  • National Pollutant Discharge Elimination System (NPDES)
    Provides information about how the permit program interacts with other CWA programs to protect and improve water quality, and provides resources for professionals working in the program at the federal, state, local, and firm level, and concerned public
  • NPDES Permit Basics | US EPA
    What is an NPDES permit? The Clean Water Act prohibits anybody from discharging "pollutants" through a "point source" into a "water of the United States" unless they have an NPDES permit The permit will contain limits on what you can discharge, monitoring and reporting requirements, and other provisions to ensure that the discharge does not hurt water quality or people's health In essence
  • About NPDES | US EPA
    The NPDES permit program, created in 1972 by the Clean Water Act (CWA), helps address water pollution by regulating point sources that discharge pollutants to waters of the United States
  • NPDES Stormwater Program | US EPA
    The National Pollutant Discharge Elimination System (NPDES) stormwater program regulates some stormwater discharges from three potential sources: municipal separate storm sewer systems (MS4s), construction activities, and industrial activities
  • Stormwater Discharges from Municipal Sources | US EPA
    Polluted stormwater runoff is commonly transported through municipal separate storm sewer systems (MS4s), and then often discharged, untreated, into local water bodies
  • Construction General Permit (CGP) Frequent Questions - US EPA
    EPA answers common questions on the construction stormwater permitting program This is intended to help operators understand the permit
  • NPDES Permit Limits - US EPA
    Effluent limitations serve as the primary mechanism in NPDES permits for controlling discharges of pollutants to receiving waters When developing effluent limitations for an NPDES permit, a permit writer must consider limits based on both the technology available to control the pollutants (i e , technology-based effluent limits) and limits that are protective of the water quality standards of
  • Animal Feeding Operations (AFOs) | US EPA
    AFOs that meet the regulatory definition of a concentrated animal feeding operation (CAFO) are regulated under the NPDES permitting program The NPDES program regulates the discharge of pollutants from point sources to waters of the United States CAFOs are point sources, as defined by the CWA [Section 502 (14)] (pdf) (132 KB)
  • National Pretreatment Program | US EPA
    The national pretreatment program is a component of the NPDES program It is a cooperative effort of federal, state, and local environmental regulatory agencies established to protect water quality Similar to how EPA authorizes the NPDES permit program to state, tribal, and territorial governments to perform permitting, administrative, and enforcement tasks for discharges to surface waters





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