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Water Hardness in Big Sky, MT

Montana · 1 zip codes · 14 matched water systems

100 PPM
5.8 GPG
Slightly Hard
0Soft60120180300+
Verified — Annual Water Quality Report

City avg (weighted): 99 PPM

Dataset updated March 9, 202614 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading
Bozeman City Of
MT0000161
Water source: surface water
Serves: 56,000
USGS environmental estimate: 81 PPM
Source context

How this city reading is built

This city reading is a weighted rollup across 14 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
2 verified treated-water sources
14 matched systems total for this city; treated-water reports are prioritized when available.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems in Big Sky

These systems are matched to Big Sky, MT. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

14 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
Bozeman City Of
MT0000161
Slightly Hard
100 PPMsurface water56,000 servedVerified — Annual Water Quality Report
Source water: 81 PPM
Belgrade City Of
MT0000136
Slightly Hard
100 PPMgroundwater10,460 servedVerified — Annual Water Quality Report
Source water: 162 PPM
Big Sky County Water And Sewer Dist 363
MT0002385
Slightly Hard
91 PPMgroundwater4,132 servedEstimated — Nearby Data
Andesite Ridge Water System
MT0004468
Slightly Hard
91 PPMgroundwater450 servedEstimated — Nearby Data
Lower Pioneer Mountain Water System
MT0004462
Slightly Hard
91 PPMgroundwater350 servedEstimated — Nearby Data
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Big Sky, MT

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Slightly Hard Water

Your water is slightly hard. You may notice minor spotting on dishes or a slight film on faucets. A water softener is optional but can improve water quality.

Recommended Products

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | How to Test Your Water

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Big Sky, MT.

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Frequently Asked Questions

How hard is the water in Big Sky, MT?

The citywide weighted average water hardness in Big Sky, MT is 99 PPM (5.8 GPG), classified as slightly hard. This is based on 14 matched water systems. The gauge highlights Bozeman City Of, a verified treated-water system, because individual systems can differ from the citywide average.

Do I need a water softener in Big Sky, MT?

At 99 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Big Sky, MT safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve Big Sky, MT?

Big Sky, Montana is served by 14 matched water systems across 1 zip code.

Learn More About Your Water