Community Water System · PWS WI2680253
Brookfield Water Utility
Operator location Brookfield, Wisconsin - 31% of 504 violations are health-based (upper-third health share (> 23%)); groundwater source; 29,070 served per SDWIS.
- 29,070
- People served (this PWS)
- 504
- EPA violations (this PWS)
- 156
- Health-based (this PWS)
- 4 PFAS
- UCMR5 (this PWS)
Brookfield Water Utility standing, high SDWIS violation third
31% of 504 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 31% is upper-third health share (> 23%). UCMR5: middle-third PFAS panel (≤ 4 compounds). Population rank #1,927 of 29,740 among systems serving 500+.
The verdict
Brookfield Water Utility sits in the upper third of the sitemap cohort by violation count (504), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (29,070; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 31% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 detected 4 PFAS compounds (middle-third PFAS panel (≤ 4 compounds)).
- #1,927 of 29,740
- Population · /systems
- #23 of 744
- Population · WI
- 504
- Total EPA violations on record
- 31%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 10,766
- County
- Waukesha
- School/Daycare
- No
- MCL Violations
- 156
- Monitoring Violations
- 332
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Gross Alpha, Excl. Radon and U | MCL | 65 | 2014 |
| Combined Radium (-226 and -228) | MCL | 57 | 2020 |
| Coliform (TCR) | MCL | 34 | 2011 |
| E. COLI | MR | 24 | 2010 |
| Gross Alpha, Excl. Radon and U | MR | 20 | 2024 |
| Nitrate | MR | 13 | 2024 |
| Combined Radium (-226 and -228) | MR | 13 | 2024 |
| Radium-228 | MR | 13 | 2024 |
| Public Notice | Other | 9 | 2020 |
| Coliform (TCR) | MR | 6 | 2008 |
| Dalapon | MR | 5 | 2017 |
| Heptachlor epoxide | MR | 5 | 2017 |
| Heptachlor | MR | 5 | 2017 |
| Atrazine | MR | 5 | 2017 |
| Carbofuran | MR | 5 | 2017 |
| 2,4-D | MR | 5 | 2017 |
| Aldicarb sulfone | MR | 5 | 2017 |
| Dinoseb | MR | 5 | 2017 |
| Picloram | MR | 5 | 2017 |
| Simazine | MR | 5 | 2017 |
| OXAMYL | MR | 5 | 2017 |
| Aldicarb | MR | 5 | 2017 |
| Pentachlorophenol | MR | 5 | 2017 |
| Chlordane | MR | 5 | 2017 |
| BHC-GAMMA | MR | 5 | 2017 |
| Methoxychlor | MR | 5 | 2017 |
| Toxaphene | MR | 5 | 2017 |
| Diquat | MR | 5 | 2017 |
| Endothall | MR | 5 | 2017 |
| Glyphosate | MR | 5 | 2017 |
Violation Count vs. the National Corpus
Brookfield Water Utility has 504 recorded EPA violations, 95% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 5% carry more. 31% of this system's own violations are health-based (156 of 504), and it ranks #1,927 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
504 Higher than most more violations than 95% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 13 of 986 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFTA | 7/27/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFMPA | 7/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFTrDA | 7/27/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFHpS | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 7/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 7/27/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 7/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 7/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 7/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 7/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 7/27/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxS | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 7/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 7/27/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFMBA | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/27/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 7/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 7/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 7/27/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 7/27/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 7/27/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 7/23/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 7/23/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 7/23/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 7/23/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 7/23/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFPeS | 7/23/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 7/23/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFMBA | 7/23/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 7/23/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 7/23/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 7/23/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 7/23/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 7/23/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFEESA | 7/23/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 7/23/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 7/23/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/23/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 7/23/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 7/23/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 7/23/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 7/23/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on Brookfield Water Utility
156 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WI2680253.
Sources: EPA SDWIS · Wisconsin DNR, Drinking Water and Groundwater
Nationwide peers
504 violations · 29,070 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Brookfield Water Utility
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Wisconsin compares on the same EPA violation measures. Wisconsin systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.