Grant City West Lagoon Wastewater Treatment Plant, Grant City, Missouri

Grant City West Lagoon is a municipal wastewater treatment facility located in Grant City, Worth County, Missouri. The plant serves a population of approximately 808 residents and operates as a lagoon-based secondary treatment system, typical for small communities in the rural Midwest. As a secondary treatment plant, the facility meets the minimum requirements under the U.S. Clean Water Act for municipal wastewater treatment. The plant has a designed capacity of 529.96 megaliters and currently discharges 302.83 megaliters annually, indicating operational capacity below design levels. The plant is subject to National Pollutant Discharge Elimination System (NPDES) permitting, administered by the Missouri Department of Natural Resources. The treated effluent is discharged to local waterways that ultimately drain into the Grand River basin, part of the larger Missouri River watershed. The plant's location inland and away from sensitive coastal environments reduces its direct impact on marine ecosystems, though it plays a role in maintaining water quality in the region's streams and rivers.

The plant discharges into receiving waters that flow into the Grand River, a tributary of the Missouri River. This watershed supports diverse aquatic life and provides habitat for fish and other species. The plant's secondary treatment helps reduce nutrient and organic pollutant loads, protecting downstream water quality in the Missouri River system.