Malta STP - Secondary Wastewater Treatment Plant in Malta, Illinois

Malta STP is a municipal wastewater treatment facility located in Malta, Illinois, serving a population of approximately 1,164 residents. The plant is situated in DeKalb County and provides secondary treatment to meet state and federal water quality standards. As a secondary treatment plant, Malta STP utilizes biological processes to reduce organic pollutants and suspended solids. The plant has a designed capacity of 2,081.97 cubic meters per day and currently treats an average daily flow of 454.25 cubic meters. Operations are conducted under the regulatory framework of the US Clean Water Act, which requires NPDES permits for discharges to surface waters. The treated effluent from Malta STP is discharged into local streams that ultimately drain into the Rock River basin. This watershed supports diverse aquatic life and provides water for downstream communities. The plant plays a key role in protecting water quality in the region.

Malta STP discharges into tributaries of the Rock River, which flows into the Mississippi River. The Rock River watershed supports diverse aquatic habitats, including fish and macroinvertebrate communities. The plant's secondary treatment helps reduce nutrient loads and organic matter, protecting downstream water quality in this agriculturally influenced region.