Gwinnett Crooked Creek STP - Peachtree Corners, Georgia Wastewater Treatment Plant

Gwinnett Crooked Creek STP is a municipal wastewater treatment plant located in Peachtree Corners, Gwinnett County, Georgia, United States. It serves a population of around 62,071, placing it in the medium-to-large agglomeration category for U.S. facilities. Under the U.S. Clean Water Act, plants of this scale are typically required to meet secondary treatment standards through the National Pollutant Discharge Elimination System (NPDES) permit program. The Georgia Environmental Protection Division issues permits that set effluent limits for biochemical oxygen demand, total suspended solids, and nutrients to protect water quality. The plant discharges treated effluent into the Chattahoochee River basin, which flows through the Atlanta metropolitan area and eventually into the Apalachicola River and Apalachicola Bay in Florida. This watershed supports diverse aquatic life and provides drinking water for millions of residents downstream.

The plant discharges into the Chattahoochee River basin, part of the larger Apalachicola-Chattahoochee-Flint (ACF) river system that drains into the Gulf of Mexico via Apalachicola Bay. This watershed is ecologically significant, supporting diverse fish and mussel species, and provides critical habitat for migratory birds. The river also supplies drinking water to the Atlanta region, making nutrient and pollutant control essential for downstream ecosystems.