TILDEN STP - Tilden, Illinois Wastewater Treatment Plant

TILDEN STP is a municipal wastewater treatment plant located in Tilden, a small village in Randolph County, Illinois. The plant serves a population of about 1,032 people, reflecting its role in managing domestic wastewater for this rural community. As a secondary treatment facility, it provides biological treatment to reduce organic matter and suspended solids before discharge. In the United States, wastewater treatment plants of this scale operate under the Clean Water Act, with National Pollutant Discharge Elimination System (NPDES) permits issued by the Illinois Environmental Protection Agency. These permits set effluent limits to protect water quality. The plant's designed capacity of 420.18 volume units indicates it has some reserve capacity for future growth. The treated effluent from TILDEN STP is discharged into a local waterway, likely a tributary of the Mississippi River basin. The plant's operations help protect downstream water quality in the Mississippi River system, which ultimately drains into the Gulf of Mexico. Proper treatment is essential to prevent nutrient pollution and maintain aquatic health in this major watershed.

TILDEN STP discharges into a local stream within the Mississippi River basin. The Mississippi River flows southward to the Gulf of Mexico, where nutrient loading contributes to seasonal hypoxic zones. The plant's secondary treatment helps reduce organic pollutants and nutrients, supporting the ecological health of downstream waters and the Gulf ecosystem.