Water quality for ZIP code 97123
ZIP 97123 covers Hillsboro, Cornelius, and Aloha in Washington County, Oregon, one of 23 ZIP codes in the county. 97 active public water systems serve the county; 70 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Washington County
28 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Westview Mobile Estates |
250 | 2 | 3.4 mi | |
| Wolsborn Farms Water District |
92 | 2 | 3.4 mi | |
| Laurelwood Water Users |
200 | 6 | 4.6 mi | |
| LA Water Co-Op |
2,500 | 2 | 5.0 mi | |
| Hillsboro, City of |
92,632 | 1 | 6.0 mi | |
| Cornelius, City of |
14,490 | 2 | 6.5 mi | |
| Laurel Acres Water CO INC |
50 | 4 | 7.7 mi | |
| Gaston, City of |
625 | 2 | 8.0 mi | |
| Beaverton, City of |
88,045 | 1 | 8.2 mi | |
| Tualatin Valley Water District |
224,600 | 0 | 8.5 mi | |
| Sherwood, City of |
20,781 | 1 | 8.7 mi | |
| Tigard, City of |
62,500 | 2 | 9.1 mi | |
| Crown Mobile Home Park |
42 | 3 | 9.3 mi | |
| Hillsboro-Cherry Grove |
1,628 | 3 | 9.8 mi | |
| Forest Grove, City of |
26,838 | 0 | 10.7 mi | |
| North Plains Water Department |
3,663 | 1 | 10.8 mi | |
| Tualatin, City of |
28,106 | 1 | 10.9 mi | |
| Raleigh Water District |
4,500 | 1 | 11.1 mi | |
| West Slope Water District |
11,000 | 2 | 11.2 mi | |
| Banks Water Department |
2,070 | 0 | 13.5 mi | |
| Star Satellite Improv Dist |
400 | 1 | 14.9 mi | |
| Fir Grove Homeowners Assn |
450 | 2 | — | |
| Timber Water Association |
180 | 9 | — | |
| Parrett Mountain View Estates |
155 | 1 | — | |
| West Laurel Acres Water CO |
65 | 3 | — |
Non-community systems in Washington County (68: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Washington County, the county this ZIP code lies in, nearest to the ZIP code's centre first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Oregon records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.