CLUTIER STL Wastewater Treatment Plant, Clutier, Iowa

CLUTIER STL is a municipal wastewater treatment plant located on Front Street in Clutier, Iowa, within Tama County. The facility serves a small population of 219 residents, reflecting the rural character of the community. As a secondary treatment plant, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant has a designed capacity of 113.56 megaliters per year and reports an annual discharge volume of 113.56 megaliters, indicating full utilization of its capacity. Under the US Clean Water Act, facilities of this scale are typically permitted through the National Pollutant Discharge Elimination System (NPDES), administered by the Iowa Department of Natural Resources. Secondary treatment is the minimum standard for municipal wastewater plants in the United States. The treated effluent is discharged into a local waterway that ultimately drains into the Iowa River basin, contributing to the Mississippi River watershed. The plant plays a key role in protecting downstream water quality and aquatic habitats in the region.

The plant discharges into a tributary of the Iowa River, which flows southeast to join the Mississippi River near Muscatine, Iowa. The Iowa River basin supports diverse aquatic life, including fish species such as channel catfish and smallmouth bass. The plant's secondary treatment helps reduce nutrient loading and organic pollution, protecting downstream ecosystems in the Mississippi River corridor.