Union WWTP and Sewer System - Municipal Wastewater Treatment in Union, Ohio

Union WWTP and Sewer System is a municipal wastewater treatment facility located in Union, Montgomery County, Ohio. Serving a population of about 6,194, the plant is part of the region's water infrastructure, handling domestic wastewater from the community. As a US-based plant serving a small agglomeration, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Ohio Environmental Protection Agency. For plants of this scale, secondary treatment is typically required, with additional nutrient controls possible depending on the receiving water body's sensitivity. The plant discharges treated effluent into local waterways that ultimately drain into the Great Miami River, a tributary of the Ohio River. The Ohio River flows into the Mississippi River and eventually reaches the Gulf of Mexico, making the plant's operations relevant to downstream water quality across a large watershed.

The treated effluent from Union WWTP enters the Great Miami River watershed, which flows southwest through Ohio before joining the Ohio River near Cincinnati. The Ohio River is a major tributary of the Mississippi River, ultimately discharging into the Gulf of Mexico. The Great Miami River supports diverse aquatic life and is used for recreation and drinking water downstream. Nutrient loading from wastewater can contribute to algal blooms in the Gulf of Mexico's hypoxic zone, highlighting the importance of effective treatment.