Water hardness in Montana

Typical Montana tap water
116mg/L
6.8gpg
Moderately hard

Population-weighted middle value across 13 Montana cities in the dataset

People with hard or very hard water
49%
Hardest
Sidney 491
Softest
Kalispell 73

We have hardness numbers for 9 Montana cities; 1 of them are county estimates rather than utility figures. Each city page adds the water system's EPA violation record and a softener size for a typical household.

Every Montana city on the hardness scale
SoftModerately hardHardVery hard060120180240300360+Billings: 159 mg/LMissoula: 116 mg/LGreat Falls: 145 mg/LBozeman: 92 mg/LButte: 97 mg/LKalispell: 73 mg/LBelgrade: 226 mg/LSidney: 491 mg/LOrchard Homes: 116 mg/LBillingsMissoulaBozemanBelgradeSidneySoftMod.HardVery hard060120180240300360+Billings: 159 mg/LMissoula: 116 mg/LGreat Falls: 145 mg/LBozeman: 92 mg/LButte: 97 mg/LKalispell: 73 mg/LBelgrade: 226 mg/LSidney: 491 mg/LOrchard Homes: 116 mg/LBillingsBozeman

Dot size follows population. Tap a dot for the city page.

0Soft
5Moderately hard
2Hard
2Very hard

Hardest water in Montana

  1. Sidney491
  2. Belgrade226
  3. Billings159
  4. Great Falls145
  5. Missoula116
  6. Orchard Homes116
  7. Butte97
  8. Bozeman92

Softest water in Montana

  1. Kalispell73
  2. Bozeman92
  3. Butte97
  4. Orchard Homes116
  5. Missoula116
  6. Great Falls145
  7. Billings159
  8. Belgrade226

All cities in Montana

Citymg/LgpgClassDataEPA health violations
Billings1599.3HardUtility report0
Missoula1166.8Moderately hardUtility report0
Great Falls1458.5HardCalculated from utility data5
Bozeman925.4Moderately hardUtility report0
Butte975.7Moderately hardUtility report0
Kalispell734.3Moderately hardCounty estimate0
Belgrade22613.2Very hardUtility report0
Sidney49128.7Very hardCalculated from utility data0
Orchard Homes1166.8Moderately hardUtility report0

Questions

Is Montana water hard?

The typical Montana resident gets about 116 mg/L (6.8 gpg), which is moderately hard. About 49% of people in the cities we track have hard or very hard water.

Which city in Montana has the hardest water?

Among 9 cities with pages here, Sidney is highest at 491 mg/L.

Which city in Montana has the softest water?

Kalispell, at 73 mg/L.

Other states

Hardness data: TapWaterData US Water Hardness, CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.