Filley WWTP - Secondary Wastewater Treatment in Gage County, Nebraska

Filley WWTP is a municipal wastewater treatment plant located in Gage County, Nebraska, serving a small population of 178 residents. The plant is situated near East US Highway 136 and operates as part of the local wastewater infrastructure for the rural community. The plant provides secondary treatment, which is the standard level required under the US Clean Water Act for municipal facilities. With a designed capacity of 75.71 million gallons per year and an actual discharge volume of 56.78 million gallons per year, the plant operates below its capacity. The US EPA's National Pollutant Discharge Elimination System (NPDES) permit program governs such facilities, ensuring compliance with water quality standards. The treated effluent is discharged into local waterways that ultimately drain into the Missouri River basin. The plant plays a key role in protecting downstream water quality in the Big Blue River watershed, which supports agricultural irrigation and aquatic habitats in southeastern Nebraska.

The plant discharges into tributaries of the Big Blue River, which flows into the Missouri River and eventually the Mississippi River. The watershed is primarily agricultural, with runoff from croplands and livestock operations. The plant's secondary treatment helps reduce nutrient loads and organic pollutants, protecting downstream aquatic ecosystems and drinking water sources.