SLATER STL Wastewater Treatment Plant, Roland, Iowa

SLATER STL is a municipal wastewater treatment plant located in Roland, Iowa, United States. The plant serves a population of approximately 1,811 residents in the Roland area and operates under secondary treatment standards. As a facility in the US, it is subject to the Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting requirements, which set effluent limits to protect water quality. The plant has a designed capacity of 681.37 thousand gallons per day and currently discharges an average of 340.69 thousand gallons per day of treated wastewater. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, meeting the minimum federal standards for municipal wastewater treatment. The treated effluent from SLATER STL is discharged into local waterways that ultimately drain into the Mississippi River basin. The plant plays a key role in protecting downstream water quality in the region, supporting aquatic life and recreational uses in receiving waters.

The plant discharges into local streams that are part of the Mississippi River watershed. The downstream environment includes agricultural and rural areas where water quality is important for both ecological health and human use. The plant's secondary treatment helps reduce nutrient and pollutant loads that could otherwise contribute to eutrophication in downstream water bodies.