PlainWater
Counties → Washington

Spokane County, Washington

Water Systems
164
Population Served
621,798
Total Violations
9,829
532 health-based
PFAS Detected
15
of 24 tested

Violation Analysis

96.3%
Systems with Violations
59.9
Avg Violations per System
5.4%
Health-Based Violations

Water Source Types

GW
50 systems (30%)

PFAS Contamination

24
Systems Tested
15
PFAS Detected
62.5%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Spokane Washington water systems by violation status, EPA SDWIS records.

No violations on record (1) One or more violations (49)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Spokane City Of 343,167 1 Detected
Whitworth Water District 2 26,883 434 Detected
Vera Water & Power 24,692 66 Clean
Consolidated Irrig Dist 19 System 2 21,220 44 Clean
Spo Co Water Dist 3 Sys 1 18,983 124 Clean
Modern Electric Water Co 18,487 262 Clean
Eastern Washington University 17,108 39 Clean
Cheney City Of 14,621 17 Clean
Liberty Lake Sewer & Water District 14,212 27 Detected
Airway Heights City Of 9,489 194 Detected
Consolidated Irrig Dist 19 System 1 9,434 22 Clean
Model Irrigation Dist #18 7,903 204 Detected
Pasadena Park Irr Dist 17 6,269 298 Clean
Spo Co Water Dist 3 Sys 4 6,155 332 Clean
Fairchild Air Force Base 5,553 10 Detected
Deer Park City Of 5,045 69 Detected
Spokane Business & Industrial Park 5,000 25 Clean
Medical Lake City Of 4,982 11 Detected
Orchard Avenue Irrigation Dist 6 4,330 24 Clean
East Spokane Water Dist 1 4,285 53 Detected
Trentwood Irrigation District 3 4,228 45 Detected
Irvin Water District #6 4,150 11 Detected
Spo Co Water Dist 3 Sys 3 3,765 271 Clean
Providence SHMC 2,838 0 -
Hutchinson Irrigation Dist #16 2,826 25 -
North Spokane Irrigation District 8 2,214 73 -
Carnhope Irrigation District 7 2,104 7 -
Millwood City Of 1,925 18 -
Moab Irrigation Dist #20 1,790 30 -
Riverside SD Central Site Schools 1,320 225 -
Mount Spokane Ski #2 1,301 9 -
Whitworth University 1,200 151 -
Kaiser Alum - Trentwood Works 954 12 -
Freeman School Dist #358 900 163 -
Hangman Hills Water Dist 15 827 24 -
WSDP Mt Spokane St Park #3 679 18 -
WSDP Riverside SP ORV Area 651 5 -
Fairfield Town Of 643 166 -
Clear Lake Rec Area 637 7 -
Ridge Water Association 615 11 -
Rockford Town Of 570 79 -
Consolidated Support Services 569 64 Clean
Stevens Co PUD - Spokane Lake Park 532 9 -
Stevens Co PUD - West Shore 505 20 -
Liberty School District #362 486 27 -
Spo Co Water Dist 3 Sys 5 485 2 -
Pioneer Water Company 443 46 -
Four Lakes Water District 10 433 22 -
Wsdp Mt Spokane State Park #6 403 29 -
Upper Columbia Academy 380 54 -

Other Counties in Washington

King County
217 systems · 3,193,095 served · 20,636 violations
Pierce County
359 systems · 1,138,508 served · 14,826 violations
Snohomish County
170 systems · 947,238 served · 8,193 violations
Clark County
72 systems · 615,931 served · 9,864 violations
Thurston County
322 systems · 395,780 served · 24,330 violations
Kitsap County
221 systems · 331,366 served · 12,667 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Spokane County? ▼
Spokane County has 9,829 total drinking water violations across 164 water systems, of which 532 are health-based violations. 96.3% of systems have at least one violation.
How many people get water from Spokane County systems? ▼
Water systems in Spokane County serve approximately 621,798 people through 164 public water systems.
Has PFAS been detected in Spokane County water? ▼
Of 24 water systems tested for PFAS in Spokane County, 15 had PFAS detected (62.5% detection rate).
What types of water sources supply Spokane County? ▼
Water systems in Spokane County use GW (50 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 5.4% of Spokane County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.