Water quality · Oregon
Water quality in Oregon
Of the 6 Oregon ZIPs matched to an EPA SDWIS community water system, none reports a health-based violation in the last 3 years, though 2 carry at least one non-health-based violation. 2 further ZIPs have no water-system record on zipradar yet. That is a gap in our records, not a sign that the water is untested. SDWIS reports the system serving the county, never an address-level test, and never private wells.
Last verified 2026-09-24 · methodology
Water quality by ZIP code in Oregon
The largest community water system EPA lists for each ZIP's county, and its health-based violations in the last 3 years.
| ZIP | Largest system | Health-based violations |
|---|---|---|
| 97201PortlandMultnomah County | PORTLAND WATER BUREAU | None |
| 97401EugeneLane County | EUGENE WATER & ELECTRIC BOARD | None |
| 97701BendDeschutes County | BEND, CITY OF | None |
| 97214Portland (OR, SE)Multnomah County | PORTLAND WATER BUREAU | None |
| 97520AshlandJackson County | ASHLAND WATER DEPARTMENT | None |
| 97231Portland (OR, NW Hills)Multnomah County | No record yet | |
| 97210Portland (Northwest)Multnomah County | No record yet | |
| 97223Tigard (OR)Washington County | TIGARD, CITY OF | None |
County-level figures from EPA SDWIS, joined to each ZIP by county. None of them is a measurement at a specific address.
What lands here
Pages show the largest community water system on record for the ZIP's county, its PWSID and population served, and its health-based and total violations in the last 3 years. Lead and copper sampling results are not shown; your utility's annual water quality report (CCR) has them.
Source & refresh
EPA SDWIS. Refreshed quarterly (federal mandate). Primary source →
Oregon top concern
Wildfire, Cascadia seismic, coastal flood
Oregon has high WUI wildfire risk in the Cascades + eastern + southern forests. Cascadia subduction zone shapes long-term seismic risk. Coastal FEMA VE/AE zones; Portland metro carries some LCRR obligations.
See Oregon state page for the full state-level rollup across all 12 dimensions.
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Lead and Copper Rule 2024 — the federal lead-pipe inventory mandate
The 2024 Lead and Copper Rule Revisions (LCRR) require every US community water system to inventory and report lead service lines. Plain-English guide.