Aquatell

Washington

The 33 hardness figures we’ve verified run from 1.0 to 13 grains per gallon, with a median of 2.9; 18% are hard or very hard.

How the 33 figures spread across the bands

  • Soft 0
  • Slightly hard 18
  • Moderately hard 9
  • Hard 5
  • Very hard 1
Hardness
2.9 gpg medianAverage 3.8 gpg (65 ppm), from 1.0 to 13. Each published figure counts once in the average, median and spread; a figure published as a range is shown as its range and isn't averaged.
Coverage
33 places33 listings as published
Disinfectant
2 of 5use chloramine; 3 use chlorine

Every place we have

Sources are each city’s water quality report or its utility. Gather the listings up by place or by the water system that serves them, or see every listing as published; open a group to see what’s in it.

33 places

On the scaleDisinfectantSourcesAsk Aqua
Spokane
No source linked
  • The page it came from links no primary source for this figure.
 13 gpg218 ppm, very hard Chlorine Disinfectant
Tri-Cities
No source linked
  • The page it came from links no primary source for this figure.
 10 gpg174 ppm, hard –
Walla Walla
No source linked
  • The page it came from links no primary source for this figure.
 10 gpg180 ppm, hard –
Wenatchee
No source linked
  • The page it came from links no primary source for this figure.
 8.0 gpg147 ppm, hard –
Tacoma
No source linked
  • The page it came from links no primary source for this figure.
 7.5 gpg127 ppm, hard Chloramine Disinfectant
Kennewick
No source linked
  • The page it came from links no primary source for this figure.
 7.4 gpg125 ppm, hard –
Sequim
No source linked
  • The page it came from links no primary source for this figure.
 6.0 gpg108 ppm, moderately hard –
Vancouver
No source linked
  • The page it came from links no primary source for this figure.
 5.7 gpg97 ppm, moderately hard Chloramine Disinfectant
Longview
No source linked
  • The page it came from links no primary source for this figure.
 5.0 gpg91 ppm, moderately hard –
Port Angeles
No source linked
  • The page it came from links no primary source for this figure.
 5.0 gpg88 ppm, moderately hard –
Yakima Valley
No source linked
  • The page it came from links no primary source for this figure.
 5.0 gpg87 ppm, moderately hard –
Lacey
No source linked
  • The page it came from links no primary source for this figure.
 4.7 gpg80 ppm, moderately hard –
Kent
No source linked
  • The page it came from links no primary source for this figure.
 4.3 gpg73 ppm, moderately hard –
Moses Lake
No source linked
  • The page it came from links no primary source for this figure.
 4.0 gpg73 ppm, moderately hard –
Richland
No source linked
  • The page it came from links no primary source for this figure.
 3.6 gpg62 ppm, moderately hard –
Olympia
No source linked
  • The page it came from links no primary source for this figure.
 3.2 gpg54 ppm, slightly hard –
Winlock
 2.9 gpg49 ppm, slightly hard – Hardness
Renton
No source linked
  • The page it came from links no primary source for this figure.
 2.3 gpg39 ppm, slightly hard –
Ellensburg
No source linked
  • The page it came from links no primary source for this figure.
 2.0 gpg33 ppm, slightly hard –
Yakima
No source linked
  • The page it came from links no primary source for this figure.
 1.9 gpg31 ppm, slightly hard –
Redmond
No source linked
  • The page it came from links no primary source for this figure.
 1.8 gpg30 ppm, slightly hard –
Bellevue
No source linked
  • The page it came from links no primary source for this figure.
 1.3 gpg21 ppm, slightly hard Chlorine Disinfectant
Burien
No source linked
  • The page it came from links no primary source for this figure.
 1.3 gpg21 ppm, slightly hard –
Kirkland
No source linked
  • The page it came from links no primary source for this figure.
 1.3 gpg21 ppm, slightly hard –
Seattle
No source linked
  • The page it came from links no primary source for this figure.
 1.3 gpg21 ppm, slightly hard Chlorine Disinfectant
Shoreline
No source linked
  • The page it came from links no primary source for this figure.
 1.3 gpg21 ppm, slightly hard –
Bellingham
No source linked
  • The page it came from links no primary source for this figure.
 1.0 gpg24 ppm, slightly hard –
Everett
No source linked
  • The page it came from links no primary source for this figure.
 1.0 gpg12 ppm, slightly hard –
Federal Way
No source linked
  • The page it came from links no primary source for this figure.
 1.0 gpg24 ppm, slightly hard –
Mount Vernon
No source linked
  • The page it came from links no primary source for this figure.
 1.0 gpg23 ppm, slightly hard –
Seattle Metro Area
No source linked
  • The page it came from links no primary source for this figure.
 1.0 gpg22 ppm, slightly hard –
Tacoma Metro Area
No source linked
  • The page it came from links no primary source for this figure.
 1.0 gpg15 ppm, slightly hard –
Whidbey Island
No source linked
  • The page it came from links no primary source for this figure.
 1.0 gpg25 ppm, slightly hard –

Missing your city? Aquatell researches cities on request from the utility’s own reports, usually within a week. A note on a figure says what we found when we checked it: units that didn’t agree, another page with a different figure, a range.

What to do about it

Hard water

Above about 3.5 grains per gallon, scale builds in water heaters, fixtures and appliances. A softener sized for your hardness and household removes it for the whole house.

Water softenersSizing a softener

Chlorine or chloramine

Standard carbon removes chlorine’s taste and smell. Chloramine lasts longer in the pipes and needs catalytic carbon to remove it.

Carbon and chloramine filters

Not sure what you need?

Aqua knows these figures and Aquatell’s treatment charts, and can size a system for your home.

Filters for Washington’s water

See them all