Water quality for ZIP code 97140
ZIP 97140 covers Sherwood, Bull Mountain, Wilsonville, Tigard, and Tualatin 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
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Washington County
28 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Crown Mobile Home Park |
42 | 3 | 2.6 mi | |
| Tualatin, City of |
28,106 | 1 | 4.7 mi | |
| Wolsborn Farms Water District |
92 | 2 | 4.8 mi | |
| Tigard, City of |
62,500 | 2 | 5.6 mi | |
| LA Water Co-Op |
2,500 | 2 | 7.7 mi | |
| Beaverton, City of |
88,045 | 1 | 8.2 mi | |
| South Hills Water System |
250 | 0 | 9.9 mi | |
| Raleigh Water District |
4,500 | 1 | 10.2 mi | |
| Tualatin Valley Water District |
224,600 | 0 | 10.9 mi | |
| West Slope Water District |
11,000 | 2 | 11.0 mi | |
| Laurelwood Water Users |
200 | 6 | 11.3 mi | |
| Westview Mobile Estates |
250 | 2 | 11.6 mi | |
| Hillsboro, City of |
92,632 | 1 | 12.4 mi | |
| Cornelius, City of |
14,490 | 2 | 14.6 mi | |
| Gaston, City of |
625 | 2 | 14.7 mi | |
| Laurel Acres Water CO INC |
50 | 4 | 15.6 mi | |
| Hillsboro-Cherry Grove |
1,628 | 3 | 17.1 mi | |
| North Plains Water Department |
3,663 | 1 | 17.9 mi | |
| Forest Grove, City of |
26,838 | 0 | 18.8 mi | |
| Banks Water Department |
2,070 | 0 | 21.5 mi | |
| Star Satellite Improv Dist |
400 | 1 | 23.0 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.