LAUREL STL Wastewater Treatment Plant, Laurel, Iowa

LAUREL STL is a wastewater treatment facility located in Laurel, Iowa, United States. Serving a small population of 271 residents, the plant is part of the municipal infrastructure in Marshall County. The plant operates with advanced treatment processes, ensuring high-quality effluent before discharge. The plant's advanced treatment level exceeds the secondary treatment standard typically required for small communities under the U.S. Clean Water Act. Advanced treatment often includes nutrient removal or disinfection steps. The plant has a designed capacity of 276.33 million gallons per year and currently discharges 113.56 million gallons per year, indicating operational headroom. The treated effluent is discharged into local waterways that ultimately drain into the Mississippi River basin. The plant's inland location and advanced treatment help protect downstream aquatic ecosystems and water quality in the region.

The plant discharges into local streams that flow into the Iowa River, a tributary of the Mississippi River. The Mississippi River basin supports diverse aquatic life and is a critical migratory corridor for birds and fish. The advanced treatment helps minimize nutrient loading and protect downstream water quality in this agriculturally intensive region.