FAIRMOUNT STP Wastewater Treatment Plant, Fairmount, Indiana

FAIRMOUNT STP is a municipal wastewater treatment plant located in Fairmount, Grant County, Indiana, United States. The facility serves a population of approximately 2,996 residents, placing it in the small agglomeration category. As a publicly owned treatment works (POTW) in the United States, it operates under the regulatory framework of the Clean Water Act, administered by the Indiana Department of Environmental Management (IDEM) through the National Pollutant Discharge Elimination System (NPDES) permit program. However, for small municipal plants in the US, typical treatment includes secondary treatment (biological processes) to meet effluent limits for biochemical oxygen demand (BOD) and total suspended solids (TSS). The facility is subject to NPDES permit requirements that set discharge limits and monitoring obligations to protect water quality. The treated effluent from FAIRMOUNT STP is discharged to a local water body, likely a tributary of the Wabash River basin, which ultimately drains to the Ohio River and then the Mississippi River. The plant plays a key role in protecting local streams from nutrient pollution and pathogens, supporting aquatic life and downstream water quality in the Mississippi River system.

FAIRMOUNT STP discharges into a local stream within the Wabash River basin, which flows into the Ohio River and then the Mississippi River before reaching the Gulf of Mexico. The facility helps protect the Wabash River watershed, which supports diverse aquatic species and is an important ecological corridor. Nutrient loading from wastewater can contribute to downstream hypoxia in the Gulf, making effective treatment critical for regional water quality.