Crawfordsville WWTP - Washington County, Iowa Wastewater Treatment Plant

Crawfordsville WWTP is a municipal wastewater treatment facility located in Washington County, Iowa, United States. The plant serves a small population of 265 residents, reflecting its role in a rural community. As a secondary treatment plant, it provides biological treatment to reduce organic matter and suspended solids before discharge. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. Its designed capacity of 121.13 units matches the current discharge volume, indicating full utilization. The facility is subject to National Pollutant Discharge Elimination System (NPDES) permitting, enforced by the Iowa Department of Natural Resources, ensuring compliance with water quality standards. The treated effluent is discharged into a local water body within the Mississippi River basin. The plant's inland location, over 50 km from the coast, reduces direct marine impact. Its operations help protect downstream aquatic ecosystems and support the region's water quality goals.

The plant discharges into a tributary of the Mississippi River, which flows into the Gulf of Mexico. The local watershed supports diverse aquatic life and is part of the larger Mississippi River basin, an important ecological corridor. The plant's secondary treatment reduces nutrient loads, helping mitigate hypoxia in the Gulf.