Gates Mills WWTP and Sewer System - Advanced Treatment in Ohio

The Gates Mills WWTP and Sewer System is a municipal wastewater treatment facility located in Gates Mills, Ohio, United States. It serves a small population of approximately 100 residents and is situated near the Chagrin River in Cuyahoga County. The plant employs advanced treatment processes, which exceed the secondary treatment standard required by the US Clean Water Act. Its designed capacity is 56.78 million gallons per day, with a similar discharge volume, indicating it may serve additional industrial or stormwater flows. As a US facility, it operates under an NPDES permit issued by the Ohio Environmental Protection Agency, ensuring compliance with federal water quality standards. The plant's treated effluent is discharged into the Chagrin River, which flows into Lake Erie, part of the Great Lakes system. This watershed supports diverse aquatic life and provides drinking water for millions. The advanced treatment helps protect the sensitive Lake Erie ecosystem from nutrient pollution and other contaminants.

The plant discharges into the Chagrin River, a tributary of Lake Erie, which is the shallowest and most biologically productive of the Great Lakes. The Lake Erie watershed supports a major fishery and provides drinking water for over 11 million people. Advanced treatment at this plant helps reduce nutrient loading, which is critical for preventing harmful algal blooms in the lake.