Cashmere STP Facility - Wastewater Treatment Plant in Cashmere, Washington

The Cashmere STP Facility is a municipal wastewater treatment plant located at 107 Riverfront Drive in Cashmere, Washington, serving a population of approximately 3,075 residents. Situated in Chelan County, the plant is part of the region's infrastructure for managing domestic wastewater in this small community. As a US facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting requirements. For a plant serving this population size, secondary treatment is typically required, with possible additional nutrient controls depending on the receiving water body's sensitivity. The plant's treated effluent is discharged into the Wenatchee River, a tributary of the Columbia River. This watershed supports diverse aquatic life, including salmonid species, and the Columbia River ultimately drains to the Pacific Ocean. The plant's performance is critical for protecting water quality in this ecologically important river system.

The Cashmere STP Facility discharges into the Wenatchee River, which flows into the Columbia River, a major Pacific Northwest waterway. The Columbia River supports extensive salmon runs and other aquatic species, making water quality management essential. The plant's location in a semi-arid region with seasonal flow variations means that maintaining low nutrient and pollutant loads is important for downstream ecosystem health.