Aquatell

Idaho

The 12 hardness figures we’ve verified run from 1.0 to 21 grains per gallon, with a median of 8.0; 67% are hard or very hard.

How the 12 figures spread across the bands

  • Soft 0
  • Slightly hard 1
  • Moderately hard 3
  • Hard 4
  • Very hard 4
Hardness
8.0 gpg medianAverage 9.0 gpg (154 ppm), from 1.0 to 21. 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
13 places13 listings as published
Disinfectant
0 of 5use chloramine; 5 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.

13 places

On the scaleDisinfectantSourcesAsk Aqua
Pocatello
No source linked
  • The page it came from links no primary source for this figure.
 21 gpg350 ppm, very hard –
Blackfoot
2 notes
  • Published as a range, 250 to 277 ppm (14.6 to 16.1 gpg): shown as a range and left out of averages.
  • The page it came from links no primary source for this figure.
 15–16 gpg250–277 ppm, very hard –
Twin Falls
No source linked
  • The page it came from links no primary source for this figure.
 16 gpg275 ppm, very hard –
Idaho Falls
No source linked
  • The page it came from links no primary source for this figure.
 14 gpg240 ppm, very hard Chlorine Disinfectant
Kimberly
No source linked
  • The page it came from links no primary source for this figure.
 8.0 gpg142 ppm, hard –
Kuna
No source linked
  • The page it came from links no primary source for this figure.
 8.0 gpg137 ppm, hard –
Meridian
No source linked
  • The page it came from links no primary source for this figure.
 8.0 gpg137 ppm, hard Chlorine Disinfectant
Coeur d'Alene
No source linked
  • The page it came from links no primary source for this figure.
 7.5 gpg127 ppm, hard –
Boise
No source linked
  • The page it came from links no primary source for this figure.
 6.0 gpg108 ppm, moderately hard Chlorine Disinfectant
Moscow
No source linked
  • The page it came from links no primary source for this figure.
 6.0 gpg110 ppm, moderately hard –
Nampa
No source linked
  • The page it came from links no primary source for this figure.
 3.6 gpg61 ppm, moderately hard Chlorine Disinfectant
Lewiston
No source linked
  • The page it came from links no primary source for this figure.
 1.0 gpg17 ppm, slightly hard –
Caldwell
 – Chlorine Disinfectant

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.

Softeners for Idaho’s water

See them all