Water quality in Cowiche, Washington
Cowiche is in Yakima County. 222 active public water systems serve the county; 67 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 Yakima County
88 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Tieton Water Dept City of |
1,475 | 0 | 3.1 mi | |
| Naches Town of |
3,512 | 3 | 4.1 mi | |
| Starks Mobile Home Court |
60 | 0 | 4.2 mi | |
| Gleed Mobile Estates |
76 | 0 | 5.4 mi | |
| Tieton Hills Water CO |
75 | 0 | 6.3 mi | |
| Green Meadows Subdivision |
32 | 1 | 6.4 mi | |
| Sun Tides Vista Homeowners Assn |
350 | 0 | 6.5 mi | |
| Sun Tides Community LLC |
63 | 0 | 6.5 mi | |
| Marys Garden |
280 | 0 | 6.7 mi | |
| Brown Taylor Water CO INC |
30 | 0 | 6.9 mi | |
| Saddle Ridge Water Users |
60 | 0 | 6.9 mi | |
| Nob Hill Water Association |
38,050 | 0 | 7.8 mi | |
| Selah City of |
9,331 | 0 | 8.4 mi | |
| Selandia Manor Water Assn |
130 | 0 | 8.4 mi | |
| Nagler Estates Water Users Assn |
54 | 1 | 8.8 mi | |
| Selah Hills Homeowners Cooperative |
300 | 0 | 9.1 mi | |
| High Valley Mobile Home Court |
142 | 1 | 9.1 mi | |
| Brocious Water System |
100 | 0 | 9.3 mi | |
| Hillview Water Assn |
95 | 0 | 9.4 mi | |
| Opr H2a |
100 | 0 | 9.5 mi | |
| Woodland Park Mobil Court |
75 | 0 | 9.9 mi | |
| Bridgeview Homesites Water Assn |
80 | 1 | 9.9 mi | |
| Yakima Water Division City of |
112,858 | 1 | 10.2 mi | |
| Yak CO Gala Estates Water System |
119 | 2 | 10.6 mi | |
| Country Squire Mobile Manor |
131 | 1 | 10.8 mi |
Non-community systems in Yakima County (133: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Yakima County, nearest to Cowiche 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.