Hubbard STP - Advanced Wastewater Treatment in Hubbard, Oregon

Hubbard STP is an advanced wastewater treatment facility located in Hubbard, Oregon, serving a population of approximately 2,285 residents. The plant is situated in Marion County and plays a key role in managing municipal wastewater for this small community. The plant provides advanced treatment, which goes beyond secondary treatment to remove additional pollutants such as nutrients. It has a designed capacity of 1,287.04 million gallons per year and currently discharges 492.10 million gallons annually. As a US facility, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permit requirements, which set effluent limits to protect water quality. The treated effluent is discharged into local waterways that drain into the Willamette River basin, ultimately reaching the Columbia River and the Pacific Ocean. The plant's advanced treatment helps protect downstream aquatic ecosystems and supports the health of the Willamette River watershed.

The plant discharges into tributaries of the Willamette River, which flows north through Oregon's Willamette Valley before joining the Columbia River. The Willamette River supports diverse fish populations including salmon and steelhead, and its watershed provides critical habitat for aquatic species. Advanced treatment at this plant helps reduce nutrient loading, protecting water quality in this ecologically important river system.