CheckPFAS

ZIP 53045 · Wisconsin

Brookfield, WI

Moderate
See the full Brookfield overview — all utilities & ZIP codes →

5 compounds detected

Detected — below EPA limits

PFHxS
3.20 ppt (32% of MCL)
0 MCL: 10 ppt 15 ppt
lithium no federal limit
14000.00 ppt
0 21000 ppt
PFBS no federal limit
7.10 ppt
0 10.7 ppt
PFPeA no federal limit
4.40 ppt
0 6.6 ppt
PFHxA no federal limit
3.30 ppt
0 5 ppt
Above EPA limit Below EPA limit No federal limit EPA MCL
PFAS Detected
6
Above EPA Limits
0
Water Systems
2
Highest % of MCL
32%

Plain English

01What this means for you

PFAS were detected at this water system, but below the EPA's Maximum Contaminant Level. "Below the limit" doesn't mean no risk — it means EPA considers the concentration acceptable across a lifetime of consumption at that level. Some people, particularly pregnant women, infants, and those with compromised immune systems, may wish to take additional precaution. Using a filter certified NSF/ANSI 58 for PFOA/PFOS reduction is a reasonable step that costs little and eliminates this variable entirely. Continue reading your utility's annual Consumer Confidence Report for year-to-year trends.

What to do next

02Three concrete steps

  1. 01

    Install a certified filter

    A reverse osmosis or NSF/ANSI 58-certified carbon block at your kitchen tap is the most reliable solution. Standard pitcher filters (Brita, PUR) don't remove PFAS unless explicitly certified for it. See certified filter picks →

  2. 02

    Read your utility's CCR

    Your water utility publishes an annual Consumer Confidence Report covering the previous year's water quality, including their PFAS treatment plan if any. More detailed than this site's summary. How to read a CCR →

  3. 03

    Reduce other exposure routes

    Water isn't the only input. Replace badly-scratched non-stick pans, skip microwave popcorn bags and greaseproof fast-food wrappers, and choose stainless or cast iron cookware. Full action plan on the FAQ →

Filter Recommendations

Find the right filter for your water
See our tested & reviewed PFAS-certified filters, ranked by CheckPFAS Score

CheckPFAS earns a small commission on filter purchases at no cost to you. Ranked by performance, not commission. Affiliate disclosure.

02TOWN OF BROOKFIELD SAN DIST 4

Low Level

PWSID · WI2680239

Water Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Wisconsin
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFBS
Perfluorobutane sulfonic acid
7.10pptNo federal limitUnregulated

03BROOKFIELD WATER UTILITY

Moderate

PWSID · WI2680253

Water Type
Groundwater
PFAS Detected
5
Above MCL
0
State
Wisconsin
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFHxS
Perfluorohexane sulfonic acid
3.20ppt
32% of limit
10 pptBelow limit
lithium
14000.00pptNo federal limitUnregulated
PFBS
Perfluorobutane sulfonic acid
4.70pptNo federal limitUnregulated
PFPeA
Perfluoropentanoic acid
4.40pptNo federal limitUnregulated
PFHxA
Perfluorohexanoic acid
3.30pptNo federal limitUnregulated

Note: ZIP code 53045 is served by 2 separate water utilities. Results above show data for each system independently.

Source & Methodology

About this data

Source
EPA UCMR 5
Data released
January 2026
Sampling period
January 2023 – December 2025
Systems tested
~10,000 public water systems
Water systems (PWSID)
WI2680239 · WI2680253
Detection threshold (MRL)
~1.5–2 ppt

Values shown are the highest single-sample concentration measured at entry points to the distribution system. Results reflect water quality at the treatment plant — aging pipes, building plumbing, and on-site storage can affect what actually reaches your tap. "Not detected" means below the MRL, not literally zero.

View raw EPA UCMR 5 occurrence data →

Related

More resources for your area

  1. 01

    How to read your utility's CCR

    Decode your annual Consumer Confidence Report

  2. 02

    On a private well?

    PFAS testing guide for well owners — EPA rules don't apply

  3. 03

    All water systems in Wisconsin

    Compare utilities statewide

  4. 04

    Which filter removes PFAS?

    Compare every method by removal rate & NSF certification

  5. 05

    PFAS health effects

    What the science shows, condition by condition

  6. 06

    PFAS compound guide

    Health effects & EPA limits for each compound