Water quality in Oso, Washington
Oso is in Snohomish County. 169 active public water systems serve the county; 68 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Snohomish County
118 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Arlington East Mutual Water Assn. |
100 | 0 | 9.0 mi | |
| Arlington Heights Water CO INC |
57 | 2 | 9.5 mi | |
| Stilliridge |
83 | 0 | 10.7 mi | |
| Meadowbrook Homeowners Assn |
35 | 1 | 11.1 mi | |
| Suddenview |
60 | 0 | 11.1 mi | |
| Meadow Ridge |
175 | 2 | 11.7 mi | |
| Mountain Loop View Tracts |
200 | 1 | 11.8 mi | |
| Kackman Creek |
330 | 1 | 12.1 mi | |
| Arlington Terrace |
104 | 0 | 12.5 mi | |
| Arlington City of |
29,508 | 0 | 13.0 mi | |
| Eagle Ridge |
250 | 0 | 13.1 mi | |
| MC Pherson Hills Water System |
30 | 0 | 13.8 mi | |
| New Start Landowners Association |
90 | 0 | 13.8 mi | |
| Granite Falls City of |
5,349 | 0 | 13.9 mi | |
| Tatoosh Water Company |
387 | 1 | 14.5 mi | |
| Darrington Water Association |
42 | 4 | 14.5 mi | |
| Darrington Town of |
2,246 | 1 | 14.5 mi | |
| Roseland Community Club Association |
210 | 0 | 14.9 mi | |
| Silver Springs Estates Comm Assn |
61 | 1 | 16.0 mi | |
| Silvana Water Association |
153 | 1 | 16.2 mi | |
| Ottercrest Estates Water System |
42 | 0 | 16.3 mi | |
| Sno Pud 1 Sunday Lake |
561 | 1 | 16.3 mi | |
| Lochaven Water |
225 | 0 | 16.8 mi | |
| Sno Pud 1 Lake Stevens |
67,710 | 1 | 17.0 mi | |
| Marysville Utilities |
88,582 | 1 | 17.1 mi |
Non-community systems in Snohomish County (50: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Snohomish County, nearest to Oso 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.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 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 Washington 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.