Overview
Dallesport Treatment is a secondary wastewater plant in Klickitat County, Washington, serving 1,625 people. It discharges 378.54 megaliters annually and operates under U.S. EPA NPDES regulations.
Dallesport Treatment is a municipal wastewater facility located in Klickitat County, Washington, United States. The plant serves a small population of 1,625 residents and is situated in a rural area near the Columbia River. It provides secondary treatment, a standard level for communities of this size under the U.S. Clean Water Act. The plant has a designed capacity of 454.25 megaliters per year and currently discharges approximately 378.54 megaliters annually, indicating it operates below its full capacity. As a U.S. facility, it is regulated under the National Pollutant Discharge Elimination System (NPDES), which sets permit limits for effluent quality to protect receiving waters. The treated effluent likely discharges into the Columbia River, a major waterway that flows to the Pacific Ocean. The Columbia River supports diverse aquatic life, including salmon runs, and is an important ecological and economic resource for the region. The plant's secondary treatment helps reduce pollutants before discharge, contributing to the health of this vital watershed.
Environmental context
The plant discharges into the Columbia River basin, which flows westward to the Pacific Ocean. The Columbia River is a critical habitat for anadromous fish species such as salmon and steelhead, and supports a complex ecosystem. Secondary treatment reduces organic matter and suspended solids, helping to maintain water quality in this ecologically sensitive river system.
Frequently asked questions
Dallesport Treatment is located on Hoctor Road in Klickitat County, Washington, United States, near the Columbia River.
The plant serves a population of 1,625 people, typical of a small rural community.
The plant provides secondary treatment and discharges treated effluent into the Columbia River basin, which flows to the Pacific Ocean.
As a U.S. facility, Dallesport Treatment operates under the Clean Water Act and is regulated via an EPA NPDES permit, which sets effluent limits to protect water quality.
For small communities in the U.S., secondary treatment is standard, as required by the Clean Water Act, to reduce organic pollutants and suspended solids before discharge.
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