Water Quality: Spokane, WA
32 water systems • 426,660 people served
Multiple Health ViolationsWater Quality Summary
Spokane is served by 32 public water systems with a combined service population of 426,660 people, and has 1,010 EPA Safe Drinking Water Act violations on record. Critically, 17 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Spokane's violation count is 523% above the national average for Washington. Contaminants associated with violations include E. coli, Selenium.
Contaminants Found
Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.
Common source: Fecal contamination from humans or animals entering the water supply
EPA limit: Zero (no E. coli permitted in drinking water)
Hair loss, nail brittleness, and nervous system damage at elevated concentrations.
Common source: Natural geological deposits, mining discharges, oil refinery waste
EPA limit: 0.05 mg/L (50 ppb)
Water Systems Serving Spokane
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| SPOKANE CITY OF | WA5383100 | Groundwater | 343,167 | 0 |
| SPO CO WATER DIST 3 SYS 1 | WA5393351 | Groundwater | 18,983 | 3 |
| MODERN ELECTRIC WATER CO | WA5355600 | Groundwater | 18,487 | 41 |
| MODEL IRRIGATION DIST #18 | WA5355550 | Groundwater | 7,903 | 130 |
| PASADENA PARK IRR DIST 17 | WA5366300 | Groundwater | 6,269 | 6 |
| SPO CO WATER DIST 3 SYS 4 | WA5393354 | Groundwater | 6,155 | 78 |
| ORCHARD AVENUE IRRIGATION DIST 6 | WA5364000 | Groundwater | 4,330 | 4 |
| TRENTWOOD IRRIGATION DISTRICT 3 | WA5389250 | Groundwater | 4,228 | 9 |
| IRVIN WATER DISTRICT #6 | WA5336050 | Groundwater | 4,150 | 6 |
| SPO CO WATER DIST 3 SYS 3 | WA5393353 | Groundwater | 3,765 | 0 |
| North Spokane Irrigation District 8 | WA5361300 | Groundwater | 2,214 | 1 |
| MILLWOOD CITY OF | WA5354850 | Groundwater | 1,925 | 7 |
| WHITWORTH UNIVERSITY | WA5396580 | Groundwater | 1,200 | 26 |
| RIDGE WATER ASSOCIATION | WA5303456 | Groundwater | 615 | 15 |
| SPO CO WATER DIST 3 SYS 5 | WA5393355 | Groundwater | 485 | 0 |
| WEST PRAIRIE VILLAGE | WA5310614 | Groundwater | 375 | 53 |
| SPO CO WATER DIST 3 SYS 8 | WA5393358 | Groundwater | 375 | 2 |
| SPO CO WATER DIST 3 SYS 6 | WA5393356 | Groundwater | 358 | 1 |
| CHATTAROY VALLEY MOBILE ESTATES | WA5312243 | Groundwater | 333 | 24 |
| River Bluff Water System | WA53AB843 | Groundwater | 330 | 11 |
| MULLEN HILL TERRACE MHP | WA5357598 | Groundwater | 207 | 41 |
| MOUNT ST MICHAELS SCHOOL & CHURCH | WA5356557 | Groundwater | 162 | 119 |
| SPO CO WATER DIST 3 SYS 9 | WA5393359 | Groundwater | 105 | 0 |
| PINE ACRES MOBILE HOME PARK | WA5367615 | Groundwater | 100 | 132 |
| INDIAN VILLAGE ESTATES WATER ASSN | WA5312028 | Groundwater | 90 | 31 |
| SHADY PINES TRAILER COURT | WA5377777 | Groundwater | 70 | 0 |
| PONDORAY SHORES WATER & SEWER | WA5363950 | Groundwater | 63 | 4 |
| TEEN CHALLENGE | WA5301819 | Groundwater | 61 | 12 |
| RIVERVALE WATER ASSN | WA5372965 | Groundwater | 48 | 3 |
| HIDDEN HILLS ESTATES | WA5332642 | Groundwater | 39 | 3 |
| WOODLAND PARK TRAILER COURT | WA5398190 | Groundwater | 38 | 0 |
| RIDGEVIEW PARK ESTATES | WA5304828 | Groundwater | 30 | 248 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Washington
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.