Where does the water in 54761 come from?

Water for zip code 54761 in Plum City, Wisconsin is provided by 2 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 54761

Plum City, Wisconsin · Pierce County

331 PPM

19.3 GPG

Very Hard

0Soft60120180300+

High Confidence — USGS Monitoring

Dataset updated March 9, 2026Matched to 2 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 2 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

2 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 54761

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.

2 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.

Water System	Source	Hardness	Pop. Served	Data Source
River Falls Waterworks WI6480246	groundwater	333 PPM Very Hard	16,000	Estimated — Nearby Data
Plum City Care Center Nursing Home WI6480372	groundwater	87 PPM Slightly Hard	120	High Confidence — USGS Monitoring

River Falls Waterworks

WI6480246

Very Hard

333 PPMgroundwater16,000 servedEstimated — Nearby Data

Plum City Care Center Nursing Home

WI6480372

Slightly Hard

87 PPMgroundwater120 servedHigh Confidence — USGS Monitoring

Nearby Zip Codes

54721100 54750331 54769100 54740327 5475987 55026298 54737194 54723332 5473687 54767322 54011331 5475687

What This Means For You

Recommendations are based on the displayed ZIP hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Very Hard Water - Treatment Strongly Recommended

Your water is very hard. Without treatment, you can expect significant scale buildup in pipes and appliances, higher energy bills from reduced water heater efficiency, and persistent issues with skin and hair dryness.

Recommended Products

Salt-Based Water Softener

Our PickAFWFilters Fleck 5600SXT 48K Also GreatWhirlpool WHES40E 40K Also GreatAFWFilters 64K Grain Also GreatAFWFilters Iron Pro 2 64K Also GreatSpringWell Filter + Softener Combo

Water Hardness Test Kit

Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)

Whole-House Water Filter

Our PickiSpring WGB32B 3-Stage

Water Softener Salt

Our PickMorton Clean & Protect Also GreatDiamond Crystal Bright & Soft

Shower Head Filter

Our PickWeddell Duo Also GreatAquaBliss SF100 Also GreatSprite Pure 7-Setting Also GreatAqua Earth 20-Stage

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | How 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 Plum City, WI (54761).

Submit Your Data

Frequently Asked Questions

Is the water hard in Plum City, WI (54761)?

The average water hardness in 54761 is 331 PPM (19.3 GPG), which is classified as very hard.

Do I need a water softener in 54761?

With hardness of 331 PPM, a water softener is recommended for homes in 54761.

Is hard water in 54761 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 54761?

Zip code 54761 in Plum City, Wisconsin is served by 2 water systems.