Hard water in Belgrade, MT
Reported by Belgrade City of · June 2025
- MT typical
- 116 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
Tap water in Belgrade has about 226 mg/L of hardness, which is 13.2 grains per gallon. On the USGS scale that counts as very hard. The number comes from Belgrade City of, dated June 2025. Reports for this system disagree, with values from 226 to 260 mg/L.
At 226 mg/L, Belgrade is 110 mg/L above the typical Montana figure of 116. Of the 8 nearest cities we track, 7 have softer water and 1 has harder. The range nearby runs from 73 mg/L in Kalispell to 491 in Sidney.
What 226 mg/L means at home
Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.
Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.
Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.
Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.
What to do about it
At 226 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 13.2 gpg = 2,970 grains a day. A 24,000-grain unit regenerates about every 8 days.
EPA record for Belgrade's water system
No health-based violations since 2016
Serves about 10,460 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 2
- Open now
- 0
Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.
Questions
Is Belgrade water hard?
Yes. It measures about 226 mg/L (13.2 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Belgrade in grains per gallon?
About 13.2 gpg. One grain per gallon equals 17.1 mg/L, so 226 mg/L divided by 17.1 gives 13.2.
What size water softener do I need in Belgrade?
For 3 people using 75 gallons each per day, 13.2 gpg works out to about 2,970 grains a day. A 24,000-grain softener covers that with a regeneration about every 8 days.
Has the Belgrade water system had EPA violations?
EPA records show no health-based violations for Belgrade City of since 2016. There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Bozeman92 mg/LModerately hard
- Butte97 mg/LModerately hard
- Great Falls145 mg/LHard
- Billings159 mg/LHard
- Missoula116 mg/LModerately hard
- Orchard Homes116 mg/LModerately hard
- Kalispell73 mg/LModerately hard
- Sidney491 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, June 11, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.