What does an NPDES permit regulate?

An NPDES permit, or National Pollutant Discharge Elimination System permit, is specifically designed to regulate the discharge of pollutants into the waters of the United States. This includes wastewater discharges from various sources such as industrial facilities, municipal sewage treatment plants, and stormwater runoff. The aim of the NPDES program is to protect water quality by controlling the amount and type of pollutants released into surface waters, thereby helping to prevent harm to aquatic ecosystems and public health.

The focus of an NPDES permit is on managing water pollution and ensuring that any discharges comply with the established water quality standards. This regulatory framework is critical for maintaining the integrity of water bodies and ensuring they support aquatic life as well as recreational and drinking water uses.