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Water Hardness in 59741

Manhattan, Montana · Gallatin County

105 PPM
6.1 GPG
Slightly Hard
0Soft60120180300+
Verified - Annual Water Quality Report

Dataset updated March 9, 2026Matched to 10 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 10 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis
2 verified treated-water sources
10 matched systems total for this ZIP; 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 Serving 59741

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

10 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
Manhattan Town Of
MT0000285
Hard
227 PPMgroundwater1,800 servedEstimated - Nearby Data
Churchill North Subdivision
MT0004431
Hard
227 PPMgroundwater155 servedEstimated - Nearby Data
Manhattan Camper Court
MT0001821
Hard
227 PPMgroundwater105 servedEstimated - Nearby Data
Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

597521005971810559745100597141055971510059740100

What This Means For You

Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.

MethodologyData sourcesHow 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 Manhattan, MT (59741).

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Frequently Asked Questions

Is the water hard in Manhattan, MT (59741)?

The average water hardness in 59741 is 105 PPM (6.1 GPG), which is classified as slightly hard.

Do I need a water softener in 59741?

At 105 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 59741 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 59741?

Zip code 59741 in Manhattan, Montana is served by 10 water systems.

Learn More About Your Water

How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

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TDS vs Water Hardness: What's the Difference?

TDS and water hardness measure different things. Learn why a TDS meter can't tell you if your water is hard, and which test you actually need.

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