County · Washington
Yakima County, Washington: drinking water records
This overview covers 20 ZIP codes and 96 community water systems in Yakima County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Grandview City of WA5328970 | 11,010 | 540 | 0 | 1 | 1.2 ppb |
| Selah City of WA5377400 | 9,331 | 180 | 0 | 1 | 0 ppb |
| Yak Co - Terrace Heights WA5306029 | 8,410 | 300 | 0 | 1 | 0 ppb |
| Yakima Water Division City of WA5399150 | 112,858 | 360 | 0 | 0 | 0 ppb |
| Nob Hill Water Association WA5359700 | 38,050 | 300 | 0 | 0 | 0 ppb |
| Sunnyside City of WA5385400 | 17,194 | 180 | 0 | 0 | 1.4 ppb |
| Toppenish Water Department WA5388850 | 8,950 | 300 | 0 | 0 | 0 ppb |
| Union Gap Water WA5390250 | 6,433 | 240 | 0 | 0 | 0 ppb |
| Moxee Water Department WA5357300 | 5,599 | 180 | 0 | 0 | 2.2 ppb |
| Wapato Waterworks WA5392800 | 5,255 | 180 | 0 | 0 | 0 ppb |
| Granger Water Department WA5329000 | 3,993 | 60 | 0 | 0 | 0 ppb |
| Zillah City of WA5399800 | 3,518 | 0 | 0 | 1 | 0 ppb |
| Naches Town of WA5358100 | 3,512 | 120 | 0 | 0 | 0 ppb |
| Tribal Complex 105300025 | 907 | 0 | 0 | 1 | 0 ppb |
| White Swan 105300026 | 900 | 0 | 0 | 7 | 0 ppb |
| Parker 105338102 | 300 | 0 | 0 | 2 | 5 ppb |
| Fort Simcoe Job Corps Ctr 105300127 | 230 | 0 | 0 | 4 | 0 ppb |
| Hi Valley View WA5300431 | 67 | 60 | 0 | 0 | 0 ppb |
| Sun Tides Community LLC WA5386280 | 63 | 0 | 0 | 1 | 0 ppb |
| B & D Mobile Court 105300073 | 45 | 0 | 0 | 3 | 1 ppb |
| Hillside Park Addition WA5333260 | 45 | 0 | 0 | 1 | 1 ppb |
| Mabton City of WA5349650 | 2,150 | 0 | 0 | 0 | 2 ppb |
| Tieton Water Dept City of WA5388300 | 1,475 | 0 | 0 | 0 | 2 ppb |
| Harrah Water System WA5331400 | 1,304 | 0 | 0 | 0 | 0 ppb |
| Yak Co - Buena Water System WA5334301 | 952 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Yakima County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.