SHOALS WWTP - Secondary Wastewater Treatment Plant in Shoals, Indiana

SHOALS WWTP is a municipal wastewater treatment facility located in Shoals, Martin County, Indiana, United States. The plant serves a population of approximately 1,043 residents and operates under the regulatory framework of the US Clean Water Act, which mandates secondary treatment for municipal discharges. The facility employs secondary treatment processes to reduce organic matter and suspended solids before discharge. With a designed capacity of 454.25 units and an average daily flow of 416.40 units, the plant operates below its maximum capacity, indicating adequate headroom for current demand. The treated effluent is discharged into a local waterway within the White River watershed, which ultimately drains to the Wabash River and then the Ohio River. This system supports diverse aquatic life and provides important ecological services in the region.

The plant's discharge enters a tributary of the White River, which flows into the Wabash River and then the Ohio River. This watershed supports diverse aquatic habitats and is an important migratory corridor for fish species. The secondary treatment level helps protect downstream water quality in this inland river system.