Macclenny STP - Wastewater Treatment Plant in Macclenny, Florida

Macclenny STP is a municipal wastewater treatment facility located in Macclenny, Baker County, Florida. The plant serves a population of about 5,662 people, classifying it as a small to medium-sized treatment facility under U.S. regulatory frameworks. As a U.S. facility, Macclenny STP operates under the Clean Water Act, with National Pollutant Discharge Elimination System (NPDES) permits issued by the Florida Department of Environmental Protection. For plants serving populations of this scale, secondary treatment is typically required, with additional nutrient removal standards applicable in Florida's sensitive watersheds. The plant's treated effluent is discharged into local waterways that drain into the St. Marys River basin, ultimately reaching the Atlantic Ocean. The surrounding area includes wetlands and ecosystems that depend on maintaining water quality standards to support aquatic life and recreational uses.

Macclenny STP discharges into the St. Marys River basin, which flows northeast to the Atlantic Ocean near the Georgia-Florida border. The river supports diverse aquatic habitats, including tidal marshes and estuarine zones that are important for fish and bird species. Maintaining proper treatment levels is essential to prevent nutrient pollution that could impact downstream water quality and coastal ecosystems.