Where does the water in 59211 come from?

Water for zip code 59211 in Antelope, Montana is provided by 1 water system. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 59211

Antelope, Montana · Sheridan County

900 PPM

52.6 GPG

Very Hard

0Soft60120180300+

High Confidence - USGS Monitoring

Dataset updated March 9, 2026Matched to 1 water systemTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 1 matched water system. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis

1 USGS-backed source

1 matched system total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.

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 59211

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.

1 water system

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.

Water System	Source	Hardness	Pop. Served	Data Source
Antelope County Water And Sewer MT0003203	surface water	900 PPM Very Hard	59	High Confidence - USGS Monitoring

Antelope County Water And Sewer

MT0003203

Very Hard

900 PPMsurface water59 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

59219547 59247210 59254213 59275210 59258547 59242547 58845559 59226189

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.

Methodology Data sources 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 Antelope, MT (59211).

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Frequently Asked Questions

Is the water hard in Antelope, MT (59211)?

The average water hardness in 59211 is 900 PPM (52.6 GPG), which is classified as very hard.

Do I need a water softener in 59211?

With hardness of 900 PPM, a water softener is recommended for homes in 59211.

Is hard water in 59211 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 59211?

Zip code 59211 in Antelope, Montana is served by 1 water system.