GRIDLEY WWTP - Secondary Treatment Plant in Gridley, Kansas

GRIDLEY WWTP is a municipal wastewater treatment facility located in Gridley, Kansas, within Coffey County. The plant serves a small population of 372 residents, reflecting the rural character of the area. It is situated inland, far from coastal waters, and its operations are governed by the US Clean Water Act. The plant provides secondary treatment, which is the standard level required by the US EPA for municipal wastewater facilities. With a designed capacity of 143.85 million gallons per year and an actual discharge volume of 140.06 million gallons per year, the plant operates near its capacity. The facility is subject to National Pollutant Discharge Elimination System (NPDES) permitting, which sets effluent limits to protect water quality. Treated effluent from GRIDLEY WWTP is discharged into local waterways that eventually drain into the Neosho River basin, part of the larger Arkansas River watershed. This region supports agricultural activities and diverse aquatic life. The plant's secondary treatment helps reduce organic pollutants and suspended solids, contributing to the ecological health of downstream waters.

GRIDLEY WWTP discharges into local streams that flow into the Neosho River, a tributary of the Arkansas River, which ultimately reaches the Mississippi River and the Gulf of Mexico. The Neosho River basin supports diverse aquatic species and provides habitat for migratory birds. The plant's secondary treatment helps protect this downstream ecosystem from nutrient pollution and organic loading.