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Water Hardness in 54670

Wilton, Wisconsin · Monroe County

67 PPM
3.9 GPG
Slightly 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
2 USGS-backed sources
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 54670

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.
Sparta Waterworks
WI6420297
Slightly Hard
62 PPMgroundwater10,025 servedHigh Confidence - USGS Monitoring
Fort Mccoy North Post
WI6420302
Slightly Hard
62 PPMgroundwater10,000 servedHigh Confidence - USGS Monitoring
Wilton Waterworks
WI6420306
Very Hard
272 PPMgroundwater490 servedEstimated - Nearby Data

Nearby Zip Codes

546386354648695465127254660128546371145392929254618114539622925461974546392725463411453950114

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 Wilton, WI (54670).

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Frequently Asked Questions

Is the water hard in Wilton, WI (54670)?

The average water hardness in 54670 is 67 PPM (3.9 GPG), which is classified as slightly hard.

Do I need a water softener in 54670?

At 67 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 54670 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 54670?

Zip code 54670 in Wilton, Wisconsin is served by 3 water systems.

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