County · Utah
Washington County, Utah: drinking water records
This overview covers 20 ZIP codes and 38 community water systems in Washington 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 |
|---|---|---|---|---|---|
| Hildale - Colorado City UTAH27006 | 6,100 | 120 | 6 | 1 | 1 ppb |
| Gunlock Special Service District UTAH27005 | 118 | 60 | 0 | 3 | 1.2 ppb |
| St George City Water System UTAH27015 | 105,240 | 515 | 0 | 0 | 1.4 ppb |
| Washington City UTAH27021 | 45,865 | 180 | 0 | 0 | 2.1 ppb |
| Hurricane City UTAH27007 | 25,555 | 180 | 0 | 0 | 1.3 ppb |
| Ivins UTAH27008 | 10,465 | 420 | 0 | 0 | 2.3 ppb |
| Santa Clara City UTAH27016 | 9,000 | 120 | 0 | 0 | 0.6 ppb |
| La Verkin City Water System UTAH27009 | 4,500 | 120 | 0 | 0 | 2.2 ppb |
| Zion Canyon Water System UTAH27051 | 3,380 | 120 | 0 | 0 | 3.2 ppb |
| Virgin UTAH27020 | 1,512 | 60 | 0 | 0 | 3.4 ppb |
| Diamond Valley Acres UTAH27065 | 1,340 | 0 | 0 | 2 | 1.2 ppb |
| Dammeron Valley Water Works LLC UTAH27030 | 885 | 0 | 0 | 2 | 1 ppb |
| Town of Apple Valley - Apple Valley UTAH27069 | 815 | 0 | 0 | 7 | 0 ppb |
| Kwu INC UTAH27059 | 460 | 0 | 0 | 1 | 1.2 ppb |
| Angell Springs Ssd UTAH27074 | 358 | 0 | 0 | 1 | 0.6 ppb |
| Harmony Farms Water Users UTAH27079 | 314 | 0 | 0 | 2 | 0 ppb |
| Rockville Pipeline Co UTAH27014 | 240 | 0 | 0 | 1 | 3 ppb |
| New Harmony Water System UTAH27011 | 200 | 0 | 0 | 1 | 0.6 ppb |
| Washington County Wcd - Cottam UTAH27071 | 130 | 60 | 0 | 0 | 3.4 ppb |
| Harmony Heights Water Company UTAH27082 | 120 | 0 | 0 | 1 | 5.9 ppb |
| North Valley Ranches Sub UTAH27086 | 78 | 0 | 0 | 8 | 0.3 ppb |
| Town of Apple Valley - Canaan UTAH27093 | 62 | 0 | 0 | 2 | 1.4 ppb |
| Pine Valley Irrigation Co UTAH27025 | 50 | 0 | 0 | 3 | 3.8 ppb |
| Central Culinary Water Co UTAH27002 | 35 | 0 | 0 | 1 | 3.6 ppb |
| Enterprise Town Water System UTAH27004 | 2,200 | 0 | 0 | 0 | 1.4 ppb |
ZIP reports in Washington 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.