Galva WWTP - Secondary Treatment Plant in Galva, Iowa

Galva WWTP is a municipal wastewater treatment facility located in Galva, Ida County, Iowa. The plant serves a small population of 434 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's designed capacity and discharge volume are both 268.76 units, indicating it operates at full capacity. Under the U.S. Clean Water Act, facilities of this scale are typically regulated through the National Pollutant Discharge Elimination System (NPDES) permit program, 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 from Galva WWTP is discharged to a local waterway that ultimately drains into the Missouri River watershed. The plant plays a key role in protecting local water quality and downstream ecosystems, including the Missouri River and its tributaries, which support diverse aquatic life and are important for regional agriculture and recreation.

The plant discharges into a tributary of the Little Sioux River, which flows into the Missouri River and eventually the Mississippi River. This watershed supports agricultural runoff and native fish species. The secondary treatment helps reduce nutrient loading and organic pollution, protecting downstream water quality in this predominantly rural region.