Which federal law establishes the National Pollutant Discharge Elimination System (NPDES) program to regulate point source discharges into waters of the United States?

Which federal law establishes the National Pollutant Discharge Elimination System (NPDES) program to regulate point source discharges into waters of the United States?

• A. Safe Drinking Water Act
• B. Rivers and Harbors Act
• C. Clean Water Act
• D. Endangered Species Act

Answer: (C)

The NPDES program comes from the Clean Water Act. That law created a permit system to control discharges from point sources into waters of the United States, so facilities like factories and wastewater plants must obtain an NPDES permit before releasing treated or untreated effluent. The permit sets specific pollutant limits based on technology and water quality requirements, and the program is administered by the EPA with state agencies sharing implementation. This framework is what allows regulators to track and limit pollutants entering rivers, lakes, and coastal waters. The other laws mentioned focus on different areas: the Safe Drinking Water Act handles protection of drinking water supplies, not the permitting of discharges into natural waters; the Rivers and Harbors Act addresses dredging and certain discharges related to navigable waters, not the nationwide permit system for point sources; and the Endangered Species Act centers on protecting species and their habitats, not discharge permits. So the federal law that establishes the NPDES program is the Clean Water Act.

The NPDES program comes from the Clean Water Act. That law created a permit system to control discharges from point sources into waters of the United States, so facilities like factories and wastewater plants must obtain an NPDES permit before releasing treated or untreated effluent. The permit sets specific pollutant limits based on technology and water quality requirements, and the program is administered by the EPA with state agencies sharing implementation. This framework is what allows regulators to track and limit pollutants entering rivers, lakes, and coastal waters. The other laws mentioned focus on different areas: the Safe Drinking Water Act handles protection of drinking water supplies, not the permitting of discharges into natural waters; the Rivers and Harbors Act addresses dredging and certain discharges related to navigable waters, not the nationwide permit system for point sources; and the Endangered Species Act centers on protecting species and their habitats, not discharge permits. So the federal law that establishes the NPDES program is the Clean Water Act.