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Water Hardness in 54730

Colfax, Wisconsin · Dunn County

174 PPM
10.2 GPG
Moderately Hard
0Soft60120180300+
High Confidence - USGS Monitoring

Dataset updated March 9, 2026Matched to 15 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 15 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
14 USGS-backed sources
15 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 54730

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.

15 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.
Menomonie Waterworks
WI6170268
Hard
194 PPMgroundwater15,950 servedEstimated - Nearby Data
Colfax Waterworks
WI6170261
Soft
30 PPMgroundwater1,102 servedHigh Confidence - USGS Monitoring
Kountry Aire Est Mhp Iii
WI7290294
Soft
30 PPMgroundwater210 servedHigh Confidence - USGS Monitoring
Wall Street Village
WI6560886
Soft
30 PPMgroundwater191 servedHigh Confidence - USGS Monitoring
New Richmond Estates
WI6560131
Soft
30 PPMgroundwater95 servedHigh Confidence - USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

5477219454739190547631945472412254725194547511945470310054729122547571185473330547283054749194

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 Colfax, WI (54730).

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Frequently Asked Questions

Is the water hard in Colfax, WI (54730)?

The average water hardness in 54730 is 174 PPM (10.2 GPG), which is classified as moderately hard.

Do I need a water softener in 54730?

With hardness of 174 PPM, a water softener is worth considering for homes in 54730.

Is hard water in 54730 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 54730?

Zip code 54730 in Colfax, Wisconsin is served by 15 water systems.

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