Peru Grissom Wastewater Treatment Plant, Miami County, Indiana

Peru Grissom is a municipal wastewater treatment plant located in Miami County, Indiana, United States. It serves a population of approximately 6,677 residents, placing it in the small-to-medium agglomeration category. The plant is situated inland, away from coastal areas, and its operations are regulated under the US Clean Water Act. As a facility serving fewer than 10,000 people, Peru Grissom is subject to US EPA secondary treatment standards under the National Pollutant Discharge Elimination System (NPDES). These standards require removal of at least 85% of biochemical oxygen demand and suspended solids. The plant's permit is issued by the Indiana Department of Environmental Management, which oversees compliance with state water quality standards. The treated wastewater from Peru Grissom is discharged into local streams that drain into the Wabash River basin, a major tributary of the Ohio River. The Wabash River supports diverse aquatic life and provides habitat for fish species such as channel catfish and smallmouth bass. The plant's operations help protect downstream water quality in the Mississippi River system.

Peru Grissom discharges into tributaries of the Wabash River, which flows southwest through Indiana to join the Ohio River. The Wabash River basin supports a variety of aquatic ecosystems, including wetlands and floodplain forests that provide habitat for migratory birds and fish. The plant's effluent contributes to the overall water quality in the Ohio-Mississippi river system, which ultimately drains into the Gulf of Mexico.