Oregon Water Quality Report
Tap water quality data for 4 cities in Oregon, updated 2026.
US average: 100 ppm
4 of 4 cities violation-free
4 cities tested
4 water systems tracked
Cleanest Tap Water in Oregon
Cities with the fewest water quality issues
No cities in Oregon have recorded water quality violations in the past 3 years.
Water Hardness Across Oregon
Not sure what your hardness means? Use our Water Hardness Calculator or find the best hardness test kits.
Oregon Tap Water: What You Need to Know
Oregon has 4 tracked water utilities serving approximately 1.3M residents. The average water hardness is 39 ppm (2.3 GPG), classified as Soft — below the national average of 100 ppm. Hardness ranges from 18.1 ppm in Eugene to 64.4 ppm in Tualatin Valley.
No cities in Oregon have recorded water quality violations in the past 3 years — an excellent compliance record. All 4 tested cities have lead levels below the EPA action level of 15 ppb.
Frequently Asked Questions About Oregon Water
Is tap water safe to drink in Oregon?
Based on available EPA data, no cities in Oregon have recorded water quality violations in the past 3 years. However, water quality can vary by building — older homes may have lead pipes. Consider testing your water at home for complete peace of mind.
How hard is the water in Oregon?
Oregon's average water hardness is 39 ppm (2.3 GPG), classified as Soft. This is below the national average of 100 ppm. Hardness varies significantly by city — use our Water Hardness Calculator to check your specific area.
Which city in Oregon has the cleanest tap water?
Based on EPA violation data, lead testing, and water quality metrics, Portland ranks as having the cleanest tap water in Oregon. It has zero violations in the past 3 years and lead levels well below the EPA action level.
Where does Oregon get its water from?
The majority of Oregon's water systems (100%) use surface water as their primary source. Surface water comes from rivers, lakes, and reservoirs. Each city's specific source can vary — check individual city reports for details.
All 4 Cities
Sorted by population served
Portland
Utility serves 666K
Tualatin Valley
Utility serves 225K
Salem Public Works
Utility serves 200K
Eugene
Utility serves 176K