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City water profile

Allouez water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Allouez, Wisconsin.

Median indexed hardness

234PPM

2 indexed ZIPs

Range 234–234 PPM

State comparison
54 PPM below
State hardness rank
#402 of 479
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Allouez has 2 published ZIP profiles across Brown County. The indexed median is 234 PPM, compared with 288 PPM across Wisconsin.

Among the 479 Wisconsincities with an indexed median, Allouez ranks #402from highest to lowest. Across all 556 state ZIP profiles, available estimates run from 41.3to 467 PPM.

The 234–234 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard2 ZIPs

2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
4.2 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 2Low: 0

Observation window: Jan 8, 2016 to Jun 10, 2026.

ZIP directory

Water reports in Allouez

Open a ZIP for site-level provenance and measurements.

ZIP code

54301

Very Hard

234 PPM

Nearest site
3.3 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

54307

Very Hard

234 PPM

Nearest site
4.2 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Central Brown Co Water Authority

PWSID WI4360287

Surface water
System population served
25
Last reported
May 29, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

No violation records are included in the current lookback window.

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Allouez

Is the water hard?

The indexed city median is 234 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.