2 plants indexed.
CALUMET STL is a secondary wastewater treatment plant in O'Brien County, Iowa, serving a small population of 170. It discharges 94.64 cubic meters of treated effluent daily.
PAULLINA STL is a secondary wastewater treatment plant serving 1,134 people in O'Brien County, Iowa. It discharges 416.40 units of treated effluent daily, with a designed capacity of 870.64 units.