Is tap water safe in Spokane?

EPA SDWIS shows no active health-based violation in this profile's reporting window. That is not the same as proving every contaminant is absent, and federal data can lag state and utility records.

How hard is the water in Spokane, WA?

Nearby USGS observations produce an estimate of 138 ppm (8.1 grains per gallon), classified as hard. This is not a tap measurement.

Do I need a water softener in ZIP code 99224?

At 138 ppm, a correctly sized whole-house softener can reduce scale buildup and hard-water spotting. Treatment for hardness does not remove all health-related contaminants.

City water profile

Spokane water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Spokane, Washington.

Median indexed hardness

134PPM

11 indexed ZIPs

Range 133–138 PPM

State comparison: 30 PPM above
State hardness rank: #41 of 133
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Spokane has 11 published ZIP profiles across Spokane County. The indexed median is 134 PPM, compared with 104 PPM across Washington.

Among the 133 Washingtoncities with an indexed median, Spokane ranks #41from highest to lowest. Across all 189 state ZIP profiles, available estimates run from 20.6to 238 PPM.

The 133–138 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard11 ZIPs

Very hard0 ZIPs

11 of 11 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 15 miles
Profiles with evidence: 11/11

Confidence labels

High: 0Moderate: 11Low: 0

Spokane City Of

PWSID WA5383100

Groundwater

System population served: 346,138
Last reported: Jun 19, 2026

A municipal system, in-state city, and served county all agree with this Census ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

No violation records are included in the current lookback window.

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Washington communities

Cheney

Spokane County

138 PPM median

Deer Park

Spokane County

136 PPM median

Medical Lake

Spokane County

138 PPM median

Newport

Pend Oreille County

134 PPM median

Winlock

Lewis County

135 PPM median

Tekoa

Whitman County

133 PPM median

Search all 133 Washington cities →

Questions people ask

About water in Spokane

Is the water hard?

The indexed city median is 134 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.