Heavy rains in the Pacific Northwest recently overwhelmed Portland's "Big Pipe" system, prompting city officials to issue a combined sewer overflow advisory for the Willamette River. Although the massive infrastructure is designed to hold up to 100 million gallons of stormwater and sewage, it reached 100% capacity Dec. 9.
Concurrently, the intense rainfall triggered a separate wastewater overflow upstream in Oregon City, reported by Clackamas Water Environment Services. That spill occurred at a manhole near McLoughlin Boulevard, leading officials to post warning signs and advise the public to stay out of the water in the area.Governors Petition EPA on Microplastics
Led by
News Briefs: Portland's 'Big Pipe' System Overflows
Also in this week's sewer and water news, a coalition of governors from seven states petitions the U.S. EPA to collect data on microplastics in the nation's drinking water
Dec 11, 2025 |














