Skip to content

City water profile

Brookfield water quality

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

Median indexed hardness

417PPM

2 indexed ZIPs

Range 417–417 PPM

State comparison
129 PPM above
State hardness rank
#11 of 479
Matched utilities
2
Active health records
0

City summary

What the indexed records say

Brookfield has 2 published ZIP profiles across Waukesha County. The indexed median is 417 PPM, compared with 288 PPM across Wisconsin.

Among the 479 Wisconsincities with an indexed median, Brookfield ranks #11from highest to lowest. Across all 556 state ZIP profiles, available estimates run from 41.3to 467 PPM.

The 417–417 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
3.4 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 2Low: 0

Observation window: May 31, 2017 to Aug 8, 2024.

ZIP directory

Water reports in Brookfield

Open a ZIP for site-level provenance and measurements.

ZIP code

53005

Very Hard

417 PPM

Nearest site
3.4 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

53045

Very Hard

417 PPM

Nearest site
0.8 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Brookfield Water Utility

PWSID WI2680253

Groundwater
System population served
29,070
Last reported
May 29, 2026

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

Town Of Brookfield San Dist 4

PWSID WI2680239

Groundwater
System population served
6,419
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.

RecordSystemPeriodStatus
Public NoticeWI2680253Mar 5, 2026Unaddressed
Gross Alpha, Excl. Radon and UWI2680253Jan 1, 2026Archived · health-based
Gross Alpha, Excl. Radon and UWI2680253Jan 1, 2024Archived
Radium-228WI2680253Jan 1, 2024Archived
NitrateWI2680253Jan 1, 2024Resolved
Combined Radium (-226 and -228)WI2680253Jan 1, 2024Archived
Revised Total Coliform RuleWI2680239Sep 1, 2022Resolved

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 Brookfield

Is the water hard?

The indexed city median is 417 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.