Safest Drinking Water in Oregon 2026
Oregon has 5 public water systems serving 1,372,688 people. The safest system is Eugene Water & Electric Board in Eugene with a score of 100/100.
Top 5 Water Systems in Oregon
| # | Water System | City | Pop. Served | Source | Violations | Score |
|---|---|---|---|---|---|---|
| 1 | Eugene Water & Electric Board | Eugene | 176,000 | Surface water | 0 | A (100) |
| 2 | Salem Public Works | Salem | 199,820 | Surface water | 0 | B (85) |
| 3 | Medford Water Commission | Medford | 106,068 | Surface water | 0 | B (83) |
| 4 | Tualatin Valley Water District | Beaverton | 224,600 | Surface water | 0 | B (80) |
| 5 | Portland Water Bureau | Portland | 666,200 | Surface water | 1 | C (78) |
Water quality data for Oregon is sourced from the EPA Safe Drinking Water Information System (SDWIS), which tracks compliance for all public water systems.
Frequently Asked Questions
Eugene Water & Electric Board in Eugene has the highest Water Safety Score in Oregon at 100/100 (Grade A), serving 176,000 people.
Oregon has 5 public water systems serving 1,372,688 people. The average Water Safety Score is 85/100.
The Water Safety Score (0-100) is based on health violations (40%), contaminant exceedances (30%), enforcement history (20%), and monitoring violations (10%). Higher scores mean cleaner, safer water.
Water Safety Score: health violations (40%), contaminant exceedances (30%), enforcement history (20%), monitoring violations (10%).
The this entity category groups every U.S. public drinking-water safety entity sharing this attribute. The list above is the data; the paragraphs below explain what the grouping means against the broader the EPA Safe Drinking Water Information System (SDWIS) distribution and how to read the relative rankings within the category.
For readers using this category as a starting point, the per-entity detail pages linked from the table above carry the underlying the EPA Safe Drinking Water Information System (SDWIS) data in full. The category-level view is the filter; the per-entity pages are the actual answer.
Source: EPA Ground Water and Drinking Water, 2026.