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Water Hardness in 58012

Casselton, North Dakota · Cass County

254 PPM
14.9 GPG
Very Hard
0Soft60120180300+
Verified - Annual Water Quality Report

Dataset updated March 9, 2026Matched to 3 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 3 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
3 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 58012

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.

3 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.
Fargo City Of
ND0900336
Very Hard
250 PPMsurface water120,762 servedVerified - Annual Water Quality Report
Source water: 355 PPM
West Fargo City Of
ND0900999
Very Hard
250 PPMsurface water34,858 servedVerified - Annual Water Quality Report
Source water: 470 PPM
Casselton City Of
ND0900166
Very Hard
516 PPMgroundwater2,513 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

580592495800425058006251580422505807925058078250580052505802125058007250580292505810225058048250

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 Casselton, ND (58012).

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Frequently Asked Questions

Is the water hard in Casselton, ND (58012)?

The average water hardness in 58012 is 254 PPM (14.9 GPG), which is classified as very hard.

Do I need a water softener in 58012?

With hardness of 254 PPM, a water softener is recommended for homes in 58012.

Is hard water in 58012 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 58012?

Zip code 58012 in Casselton, North Dakota is served by 3 water systems.

Learn More About Your Water

How to Test Water Hardness at Home

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Water Hardness Scale: PPM and GPG Chart

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Well Water Hardness: Why It's Usually Hard & How to Treat It

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