Overview
Grants Pass STP serves approximately 51,766 residents in Grants Pass, Oregon. The plant operates under the U.S. Clean Water Act, discharging treated wastewater into the Rogue River basin.
Grants Pass STP is a municipal wastewater treatment facility located in Grants Pass, Oregon, serving a population of around 51,766. The plant is situated in Josephine County, within the Rogue River watershed, and plays a key role in managing wastewater for this inland community. As a medium-sized agglomeration, the plant is expected to meet secondary treatment standards under the U.S. Clean Water Act. The National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Oregon Department of Environmental Quality, governs its discharge requirements to protect water quality. The treated effluent is discharged into the Rogue River, which flows westward to the Pacific Ocean. The river supports diverse aquatic life, including salmon and steelhead, making effective treatment essential for downstream ecological health.
Environmental context
The plant discharges into the Rogue River, a major waterway in southwestern Oregon that flows into the Pacific Ocean. The river supports a variety of fish species, including Chinook salmon and steelhead trout, and is an important migratory corridor. The surrounding watershed includes mixed forest and agricultural land, and the plant's operations help maintain water quality in this ecologically sensitive region.
Frequently asked questions
Grants Pass STP is located in Grants Pass, Josephine County, Oregon, United States, near Southwest Greenwood Avenue.
The plant serves approximately 51,766 people, classifying it as a medium-sized agglomeration under U.S. regulatory frameworks.
The treated effluent is discharged into the Rogue River, which flows westward to the Pacific Ocean.
The plant operates under the U.S. Clean Water Act, with discharge permits issued by the Oregon Department of Environmental Quality through the NPDES program.
Plants of this scale typically employ secondary treatment, including biological processes like activated sludge, to meet EPA standards for organic matter and suspended solids removal.
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