Collyer WWTP - Secondary Wastewater Treatment in Trego County, Kansas

Collyer WWTP is a municipal wastewater treatment facility located in Trego County, Kansas, United States. The plant serves a small population of 133 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's designed capacity is 113.56 million gallons per year, with an actual discharge volume of 49.21 million gallons per year. Under the U.S. Clean Water Act, facilities of this scale are typically regulated through the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. Secondary treatment is the minimum standard required for municipal wastewater plants in the United States. The treated effluent from Collyer WWTP is discharged into local waterways that ultimately drain into the Kansas River basin, part of the larger Mississippi River watershed. The plant's operations help protect downstream aquatic ecosystems and maintain water quality in the region's streams and rivers, which support diverse wildlife and recreational uses.

Collyer WWTP discharges into tributaries of the Smoky Hill River, which flows into the Kansas River and eventually the Mississippi River. The plant's location in the Great Plains region means the receiving waters are part of a semi-arid watershed where maintaining water quality is critical for aquatic life and agricultural use. The plant's secondary treatment helps reduce nutrient loading and protects downstream habitats.