Pickaway Co Circle Hills WWTP - Thacher, Ohio Wastewater Treatment Plant

Pickaway Co Circle Hills WWTP is a municipal wastewater treatment facility located in Thacher, Pickaway County, Ohio, United States. The plant serves a small population of 160 residents and operates with advanced treatment processes to ensure high-quality effluent. The plant treats an average daily flow of 75.71 m³/day against a designed capacity of 113.56 m³/day, indicating operational headroom. As a US facility, it operates under the Clean Water Act's National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits and monitoring requirements to protect water quality. The treated effluent is discharged to a local water body, contributing to the Scioto River watershed, which flows into the Ohio River and ultimately the Mississippi River. The plant's advanced treatment helps protect downstream aquatic ecosystems and supports regional water quality goals.

The plant discharges into a tributary of the Scioto River, which flows south to the Ohio River, a major tributary of the Mississippi River. The Scioto River watershed supports diverse aquatic life, including fish species such as smallmouth bass and channel catfish. The advanced treatment at this plant helps minimize nutrient loading and protects downstream water quality in the Ohio River basin.