County · Washington
Spokane County, Washington: drinking water records
This overview covers 40 ZIP codes and 93 community water systems in Spokane County. It also stands in for 1 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 |
|---|---|---|---|---|---|
| Spokane City of WA5383100 | 346,138 | 360 | 4 | 0 | 2 ppb |
| Whitworth Water District 2 WA5396601 | 26,883 | 540 | 4 | 0 | 1.3 ppb |
| Vera Water & Power WA5391450 | 24,692 | 330 | 0 | 0 | 20.8 ppb |
| Consolidated Irrig Dist 19 System 2 WA5310221 | 21,220 | 240 | 0 | 0 | 1.3 ppb |
| Spo Co Water Dist 3 Sys 1 WA5393351 | 19,035 | 300 | 0 | 0 | 1.6 ppb |
| Modern Electric Water Co WA5355600 | 18,487 | 480 | 0 | 0 | 0 ppb |
| Eastern Washington University WA5321900 | 17,108 | 60 | 0 | 0 | 6.5 ppb |
| Cheney City of WA5312400 | 16,954 | 296 | 0 | 0 | 1.3 ppb |
| Liberty Lake Sewer & Water District WA5347150 | 14,500 | 240 | 1 | 0 | 1.5 ppb |
| Fairchild Air Force Base WA5324350 | 9,544 | 120 | 5 | 0 | 4.2 ppb |
| Airway Heights City of WA5300650 | 9,489 | 120 | 4 | 0 | 11.1 ppb |
| Consolidated Irrig Dist 19 System 1 WA5310220 | 9,434 | 180 | 0 | 0 | 4.4 ppb |
| Model Irrigation Dist #18 WA5355550 | 7,903 | 390 | 5 | 0 | 2.1 ppb |
| Pasadena Park Irr Dist 17 WA5366300 | 6,269 | 240 | 0 | 0 | 2.6 ppb |
| Spo Co Water Dist 3 Sys 4 WA5393354 | 6,233 | 240 | 0 | 0 | 1 ppb |
| Deer Park City of WA5318500 | 5,435 | 480 | 3 | 0 | 1.6 ppb |
| Medical Lake City of WA5353400 | 4,982 | 120 | 2 | 0 | 1.1 ppb |
| Orchard Avenue Irrigation Dist 6 WA5364000 | 4,330 | 120 | 0 | 0 | 1.1 ppb |
| East Spokane Water Dist 1 WA5321650 | 4,285 | 240 | 1 | 0 | 2.8 ppb |
| Trentwood Irrigation District 3 WA5389250 | 4,228 | 240 | 5 | 0 | 2.5 ppb |
| Irvin Water District #6 WA5336050 | 4,150 | 240 | 1 | 0 | 0 ppb |
| Spo Co Water Dist 3 Sys 3 WA5393353 | 3,768 | 120 | 0 | 0 | 1.2 ppb |
| Millwood City of WA5354850 | 1,925 | 0 | 0 | 1 | 5.4 ppb |
| Consolidated Support Services WA5321850 | 569 | 60 | 0 | 0 | 4.3 ppb |
| Two Rivers Resort 105300123 | 480 | 0 | 0 | 13 | 0 ppb |
ZIP reports in Spokane County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 99036.
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.