Marion Northwest Regional WWTF - Advanced Wastewater Treatment in Marion County, Florida

Marion Northwest Regional WWTF is an advanced wastewater treatment facility located in Marion County, Florida, United States. The plant serves a small population of 125 residents and operates as part of the county's municipal wastewater infrastructure. Its location in north-central Florida places it within a region characterized by karst geology and numerous springs. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 56.78 million gallons per day and an average discharge volume of 37.85 million gallons per day, the facility operates well within its capacity. Under the U.S. Clean Water Act, such facilities are required to obtain National Pollutant Discharge Elimination System (NPDES) permits, which set effluent limits to protect water quality. The treated effluent is discharged into local water bodies that ultimately drain into the Gulf of Mexico via the Withlacoochee River or Ocklawaha River systems. The region's aquatic ecosystems include freshwater springs and wetlands that support diverse species. Advanced treatment helps minimize nutrient loading, which is critical for preventing algal blooms and maintaining the ecological health of downstream estuaries.

The plant discharges into the Ocklawaha River watershed, which flows into the St. Johns River and eventually to the Atlantic Ocean. This basin supports diverse aquatic life, including manatees and migratory fish. Advanced treatment reduces nutrient pollution, protecting downstream springs and estuaries from eutrophication.