Guide Rock WWTP - Secondary Treatment Plant in Webster County, Nebraska

Guide Rock WWTP is a municipal wastewater treatment plant located in Webster County, Nebraska, United States. The facility serves a small population of 225 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 45.43 million gallons per year, indicating it operates well below its capacity. Under the U.S. Clean Water Act, such facilities are regulated through the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The plant is expected to comply with state and federal standards. The treated effluent from Guide Rock WWTP is discharged into a local waterway that ultimately drains into the Republican River basin, which flows through Nebraska and Kansas before joining the Kansas River. This watershed supports agricultural irrigation and provides habitat for fish and wildlife. The plant's discharge contributes to the base flow of local streams, especially during dry periods, and its treatment level helps maintain downstream water quality.

Guide Rock WWTP discharges into a tributary of the Republican River, which flows southeast through Nebraska and Kansas to join the Kansas River and eventually the Missouri River. The Republican River basin is a vital agricultural region, and the plant's secondary treatment helps protect downstream aquatic ecosystems from nutrient enrichment and organic pollution. The watershed supports diverse fish populations and migratory birds, making water quality management important for both ecological health and human uses such as irrigation and recreation.