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Water Hardness in 55019

Dundas, Minnesota · Rice County

344 PPM
20.1 GPG
Very Hard
0Soft60120180300+
High Confidence - USGS Monitoring

Dataset updated March 9, 2026Matched to 4 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 4 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
3 USGS-backed sources
4 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 55019

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.

4 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.
Faribault
MN1660002
Very Hard
344 PPMgroundwater23,718 servedEstimated - Nearby Data
Northfield
MN1660010
Very Hard
344 PPMgroundwater20,790 servedHigh Confidence - USGS Monitoring
Dundas
MN1660015
Very Hard
344 PPMgroundwater1,490 servedHigh Confidence - USGS Monitoring
Morgedal Homeowners Association
MN1660017
Very Hard
344 PPMgroundwater49 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

550573445502134455046344550883445505334455020355550182985508734455065256560693445505234155044256

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 Dundas, MN (55019).

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Frequently Asked Questions

Is the water hard in Dundas, MN (55019)?

The average water hardness in 55019 is 344 PPM (20.1 GPG), which is classified as very hard.

Do I need a water softener in 55019?

With hardness of 344 PPM, a water softener is recommended for homes in 55019.

Is hard water in 55019 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 55019?

Zip code 55019 in Dundas, Minnesota is served by 4 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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