![Water pollution / Environmental engineering / Aquatic ecology / Hydraulic engineering / Sewerage / Willamette River / Combined sewer / Portland / Oregon / Wastewater / Allegheny County Sanitary Authority Water pollution / Environmental engineering / Aquatic ecology / Hydraulic engineering / Sewerage / Willamette River / Combined sewer / Portland / Oregon / Wastewater / Allegheny County Sanitary Authority](https://www.pdfsearch.io/img/11145c0f84bd00d54ba87a17ad790f4e.jpg) Date: 2009-08-20 17:05:23Water pollution Environmental engineering Aquatic ecology Hydraulic engineering Sewerage Willamette River Combined sewer Portland Oregon Wastewater Allegheny County Sanitary Authority | | Fact Sheet Is it Safe to Swim in the Willamette River in Portland? DEQ monitors bacteria The Willamette River in Portland is safe for swimming and other recreational uses at most
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