Lake Stevens STP, Snohomish County

Overview

Lake Stevens STP serves approximately 28,210 people in Snohomish County, Washington. The plant operates under the U.S. Clean Water Act and discharges treated wastewater into the local watershed.

Lake Stevens STP is a municipal wastewater treatment plant located in Snohomish County, Washington, serving a population of around 28,210. The plant is situated near Lake Stevens and is part of the region's water infrastructure. As a medium-sized facility, Lake Stevens STP is subject to the U.S. Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting. Plants of this scale typically employ secondary treatment or better to meet water quality standards. The designed capacity is 1.00 million gallons per day, indicating the plant's treatment capacity. The plant's treated effluent is discharged into the Snohomish River basin, which flows into Puget Sound. This water body supports diverse aquatic life and is an important ecological corridor in the Pacific Northwest. The plant's operations help protect downstream water quality and marine habitats.

Environmental context

The plant discharges into the Snohomish River watershed, which drains into Puget Sound, a major estuary in Washington. This region supports salmon runs, shellfish beds, and other sensitive aquatic species. Protecting water quality in this basin is critical for maintaining the ecological health of the sound and its tributaries.

Frequently asked questions

Lake Stevens STP is located in Snohomish County, Washington, near Lake Stevens and the Snohomish River basin.

The plant serves approximately 28,210 people in the Lake Stevens area of Snohomish County.

The plant discharges treated effluent into the Snohomish River watershed, which flows into Puget Sound.

The plant operates under the U.S. Clean Water Act and is regulated via an NPDES permit issued by the Washington State Department of Ecology.

Plants of this size in the U.S. typically employ secondary treatment or advanced treatment to meet NPDES permit limits and protect receiving water quality.