Water Hardness in Montana

56 counties — Average 269.2 PPM (Very Hard)

2
10
12
32
Soft (3.6%) Moderate (17.9%) Hard (21.4%) Very Hard (57.1%)

Montana Water Hardness Map

Soft   Moderate   Hard   Very Hard

Hardest Water Counties

Big Horn325 PPM
Blaine279 PPM
Carter350 PPM
Cascade290 PPM
Chouteau190 PPM
Custer340 PPM
Daniels288 PPM
Dawson388 PPM
Fallon295 PPM
Fergus275.5 PPM
Garfield189.5 PPM
Golden Valley447.5 PPM
+20 more
Montana

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All 56 Counties — By Water Hardness

CountyClassificationHardness
Beaverhead Hard 134 PPM
Big Horn Very Hard 325 PPM
Blaine Very Hard 279 PPM
Broadwater Hard 147 PPM
Carbon Hard 160 PPM
Carter Very Hard 350 PPM
Cascade Very Hard 290 PPM
Chouteau Very Hard 190 PPM
Custer Very Hard 340 PPM
Daniels Very Hard 288 PPM
Dawson Very Hard 388 PPM
Deer Lodge Hard 150 PPM
Fallon Very Hard 295 PPM
Fergus Very Hard 275.5 PPM
Flathead Moderate 87 PPM
Gallatin Hard 140 PPM
Garfield Very Hard 189.5 PPM
Glacier Moderate 98.2 PPM
Golden Valley Very Hard 447.5 PPM
Granite Hard 130 PPM
Hill Hard 140 PPM
Jefferson Soft 46.2 PPM
Judith Basin Hard 177 PPM
Lake Moderate 105 PPM
Lewis and Clark Hard 121 PPM
Liberty Very Hard 240 PPM
Lincoln Moderate 98.5 PPM
Madison Hard 150 PPM
McCone Very Hard 260 PPM
Meagher Very Hard 194 PPM
Mineral Moderate 90 PPM
Missoula Moderate 109 PPM
Musselshell Very Hard 553 PPM
Park Moderate 70 PPM
Petroleum Very Hard 700 PPM
Phillips Very Hard 329 PPM
Pondera Very Hard 236 PPM
Powder River Very Hard 606 PPM
Powell Very Hard 187 PPM
Prairie Very Hard 270 PPM
Ravalli Soft 29.5 PPM
Richland Very Hard 240 PPM
Roosevelt Very Hard 255.5 PPM
Rosebud Very Hard 1810 PPM
Sanders Moderate 85.9 PPM
Sheridan Very Hard 426 PPM
Silver Bow Hard 161 PPM
Stillwater Moderate 78.4 PPM
Sweet Grass Moderate 98.5 PPM
Teton Very Hard 415 PPM
Toole Very Hard 460.5 PPM
Treasure Very Hard 320 PPM
Valley Very Hard 236 PPM
Wheatland Very Hard 332 PPM
Wibaux Very Hard 570 PPM
Yellowstone Hard 174 PPM

Source: USGS Water Quality Portal

Frequently Asked Questions

How hard is the water in Montana?

Montana has an average water hardness of 269.2 PPM, classified as very hard. Out of 56 counties, 2 have soft water, 10 moderately hard, 12 hard, and 32 very hard.

Which Montana counties have the hardest water?

Montana has 32 counties with very hard water (above 180 mg/L). See the county table above for a complete breakdown by hardness level.

How do I check water hardness for my Montana address?

Enter your ZIP code in the search box above to see your area's estimated water hardness, classification, and water utility information.