OLIN WWTP - Olin, Iowa Wastewater Treatment Plant

OLIN WWTP is a municipal wastewater treatment facility located in Olin, Jones County, Iowa, United States. The plant serves a population of approximately 663 residents, providing secondary treatment to remove organic matter and suspended solids from domestic wastewater. As a secondary treatment plant, OLIN WWTP operates under the U.S. Clean Water Act, which requires such facilities to meet effluent limitations set by National Pollutant Discharge Elimination System (NPDES) permits. The plant's designed capacity is 340.69 cubic meters per day, and it currently processes an average daily flow of 189.27 cubic meters, indicating operational headroom. The treated effluent is discharged into local surface waters, which ultimately drain into the Mississippi River basin. The plant plays a key role in protecting downstream water quality and aquatic ecosystems in the region.

OLIN WWTP discharges into local streams that flow into the Wapsipinicon River, a tributary of the Mississippi River. The Mississippi River basin supports diverse aquatic life and is a critical migratory corridor for fish and birds. The plant's secondary treatment helps reduce nutrient and organic pollution, safeguarding downstream water quality in this agriculturally intensive region.