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Water Hardness in 55969

Rollingstone, Minnesota · Winona County

207 PPM
12.1 GPG
Hard
0Soft60120180300+
High Confidence - USGS Monitoring

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
1 USGS-backed source
3 matched systems total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.
Water source profile
Primarily groundwater
Groundwater commonly picks up calcium and magnesium after contact with rock and soil. 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 55969

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.
Winona
MN1850013
Hard
207 PPMgroundwater27,782 servedHigh Confidence - USGS Monitoring
Stockton
MN1850020
Hard
207 PPMgroundwater697 servedEstimated - County Avg
Rollingstone
MN1850008
Hard
207 PPMgroundwater664 servedEstimated - Nearby Data

Nearby Zip Codes

55959207559102095595220755972207559792075462911954622875598720755945300559643245592928054625119

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 Rollingstone, MN (55969).

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Frequently Asked Questions

Is the water hard in Rollingstone, MN (55969)?

The average water hardness in 55969 is 207 PPM (12.1 GPG), which is classified as hard.

Do I need a water softener in 55969?

With hardness of 207 PPM, a water softener is recommended for homes in 55969.

Is hard water in 55969 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 55969?

Zip code 55969 in Rollingstone, Minnesota is served by 3 water systems.

Learn More About Your Water

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

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