3 plants indexed.
Harvey STP in Marion County, Iowa, is a secondary treatment plant serving 235 people. It discharges 75.71 units of treated wastewater, operating under U.S. Clean Water Act regulations.
KNOXVILLE WWTF serves approximately 7,731 people in Marion County, Iowa, United States. The plant discharges treated wastewater into local waterways, supporting the region's water quality.
PELLA WWTP serves approximately 10,360 people in Marion County, Iowa. The plant operates under the U.S. Clean Water Act, with NPDES permits regulating its discharge to protect local water quality.