Is Tap Water Safe to Drink in Portland?
Yes, tap water in Portland is safe to drink and ranks among the best in the country, sourced from the protected Bull Run Watershed in the Cascade foothills.
Water Source
The Portland Water Bureau draws primarily from the Bull Run Watershed, a protected forested reservoir system, supplemented by groundwater wells during peak summer demand.
EPA Compliance Status
Meets all federal Safe Drinking Water Act standards. Bull Run water is unfiltered, and after Cryptosporidium detections the city is building a filtration plant under a compliance agreement with the Oregon Health Authority, due in 2027. Portland also exceeded the federal lead action level in 2021 and has since strengthened corrosion control.
Notable Contaminants & Context
- •Cryptosporidium is detected at low levels in the unfiltered Bull Run supply; a filtration plant due in 2027 will remove it
- •Some older homes have legacy lead service lines; the utility adjusts water chemistry for corrosion control
How It Compares
Bull Run water is exceptionally clean at the source, but it is one of the few large US supplies still unfiltered, which is why a filtration plant is under construction.
Tips
- •Portland's tap water is genuinely excellent straight from the tap
- •No need for bottled water around the city
- •The Water Bureau publishes detailed annual water quality reports
Frequently Asked Questions
Sources & References
The safety rating and guidance on this page draw on the following sources. See our full methodology.
- •US EPA Safe Drinking Water Act regulations
- •EWG Tap Water Database
- •The utility's most recent Consumer Confidence Report (CCR)
- •WHO Guidelines for Drinking-water Quality