Water Quality in Portland, OR
Detailed water quality data for Portland, Oregon including contaminant levels, EPA comparisons, AquaScore™ grading, and treatment recommendations.
Water utility: Portland Water Bureau.
Water source: Bull Run Watershed, Columbia South Shore Well Field.
Key Contaminants Found
- Haloacetic acids (HAA5)
- Total trihalomethanes (TTHMs)
- Lead
- Copper
- Chloroform
Portland's Bull Run Watershed is one of the most pristine municipal water sources in the US — an uninhabited forested area. However, the city famously does not filter its surface water, relying on UV and chlorine treatment.