Sandborn WWTP - Secondary Treatment Plant in Knox County, Indiana

Sandborn WWTP is a municipal wastewater treatment facility located in Knox County, Indiana, United States. It serves a small population of 466 residents, reflecting its role in a rural community. The plant is situated on Sand Road and operates under the regulatory framework of the US Clean Water Act, which governs wastewater discharges through the National Pollutant Discharge Elimination System (NPDES) permit program. The plant provides secondary treatment, a standard level that removes biodegradable organic matter and suspended solids. With a designed capacity of 249.84 thousand gallons per day and a similar discharge volume, the facility is sized appropriately for its service area. Secondary treatment is typical for small communities in the US, meeting federal requirements for protecting water quality. The treated effluent from Sandborn WWTP is discharged into local streams that drain into the Wabash River basin, ultimately reaching the Ohio River and then the Mississippi River. This watershed supports diverse aquatic life and provides water for downstream communities. The plant's operation helps maintain the ecological health of these waterways by reducing pollutant loads.

Sandborn WWTP discharges into tributaries of the Wabash River, which flows into the Ohio River and then the Mississippi River. This watershed supports diverse aquatic species and provides critical habitat for fish and invertebrates. The plant's secondary treatment helps protect downstream water quality in this ecologically significant river system.