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Washington Water Hardness

Across the 10 cities we track in Washington, hardness ranges from 0.73–15 GPG, with 3 cities running hard or very hard.

10 cities tracked. View the Washington hardness map → · Is Washington water safe to drink? →

Spokane Valley

15 GPG · 256.5 ppm
Very Hard

Spokane

9.3 GPG · 159 ppm
Hard

Kent

8.19 GPG · 140 ppm
Hard

Vancouver

5.41 GPG · 92.5 ppm
Moderate

Federal Way

3.16 GPG · 54.07 ppm
Soft

Renton

2.69 GPG · 46 ppm
Soft

Seattle

1.55 GPG · 26 ppm
Soft

Tacoma

1.5 GPG · 26 ppm
Soft

Bellevue

1.41 GPG · 24.1 ppm
Soft

Everett

0.73 GPG · 12.5 ppm
Soft