Monroe WWTP | Wastewater Treatment Plant in Monroe, Wisconsin

Monroe WWTP is a municipal wastewater treatment facility located in Monroe, Wisconsin, serving a population of about 11,015. The plant is situated in Green County and is part of the region's essential water infrastructure. As a U.S. facility, Monroe WWTP operates under the Clean Water Act's National Pollutant Discharge Elimination System (NPDES) permit program. For a community of this size, secondary treatment is typically required, and the plant is subject to state-level oversight by the Wisconsin Department of Natural Resources. The treated effluent from Monroe WWTP is discharged into local waterways that eventually drain into the Mississippi River Basin. This connection to the larger watershed underscores the plant's role in protecting downstream water quality and aquatic ecosystems.

Monroe WWTP discharges into local streams that flow into the Pecatonica River, a tributary of the Rock River, which ultimately joins the Mississippi River. The Mississippi River Basin supports diverse aquatic life and is a critical migratory corridor for fish and birds. The plant's operations help maintain water quality in this extensive watershed, reducing nutrient and pollutant loads that could impact downstream ecosystems.