Overview
North Powder STP is a secondary treatment plant serving 490 people in North Powder, Oregon. It discharges 151.42 megaliters annually and operates under U.S. EPA NPDES regulations.
North Powder STP is a municipal wastewater treatment plant located in North Powder, Union County, Oregon, serving a small population of 490 residents. The facility provides secondary treatment, a standard level for small communities in the United States. With a designed capacity of 518.60 megaliters and an annual discharge volume of 151.42 megaliters, the plant operates well within its capacity. As a U.S. facility, it is regulated under the Clean Water Act via an NPDES permit issued by the Oregon Department of Environmental Quality, ensuring compliance with effluent limits. The plant discharges into a local waterway that ultimately drains into the Powder River basin, a tributary of the Snake River system. This watershed supports agricultural irrigation and aquatic habitats in eastern Oregon's semi-arid landscape.
Environmental context
The plant's discharge enters a tributary of the Powder River, which flows into the Snake River and eventually the Columbia River, reaching the Pacific Ocean. The local watershed supports cold-water fisheries and irrigated agriculture, making nutrient and pathogen control critical for downstream water quality.
Frequently asked questions
North Powder STP is located in North Powder, Union County, Oregon, United States.
The plant serves a population of 490 people.
The plant discharges treated effluent into a local waterway that flows into the Powder River basin, part of the Snake River system.
North Powder STP provides secondary treatment, which is the standard required by the U.S. Clean Water Act for municipal plants of this scale.
As a U.S. facility, North Powder STP operates under the Clean Water Act and is permitted through the National Pollutant Discharge Elimination System (NPDES), administered by the Oregon Department of Environmental Quality.
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