Is Town of Brookfield San Dist 4 Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Waukesha

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

215

violations on file

still open

Violation	Type	Status	Period
MON	Monitoring	Resolved	2022-09-01 → 2022-09-30
MON	Monitoring	Resolved	2022-09-01 → 2022-09-30
MON	Monitoring	Resolved	2022-09-01 → 2022-09-30
MON	Monitoring	Resolved	2022-09-01 → 2022-09-30
MR	Monitoring	Resolved	2012-01-01 → 2012-12-31
MR	Monitoring	Resolved	2012-01-01 → 2012-12-31
MR	Monitoring	Resolved	2012-01-01 → 2012-12-31
MR	Monitoring	Resolved	2012-01-01 → 2012-12-31
MR	Monitoring	Resolved	2012-01-01 → 2012-12-31
MR	Monitoring	Resolved	2012-01-01 → 2012-12-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	280.5 µg/L 22% of the EPA limit 1300 µg/L worst single sample: 390 µg/L	40/40	SYR4	2014–2017
Lead	13.55 µg/L 90% of the EPA limit 15 µg/L worst single sample: 140 µg/L	40/40	SYR4	2014–2017
Bromodichloromethane	9.715 µg/L No EPA limit set worst single sample: 9.8 µg/L	18/20	SYR4	2013–2019
Dibromochloromethane	15.15 µg/L No EPA limit set worst single sample: 16 µg/L	18/21	SYR4	2013–2019
Bromoform	7.18 µg/L No EPA limit set worst single sample: 8.7 µg/L	17/18	SYR4	2013–2019
Chloroform	3.905 µg/L No EPA limit set worst single sample: 4.1 µg/L	14/18	SYR4	2013–2019
Lead	0.0034 mg/L 23% of the EPA limit 0.0150 mg/L	14/14	LCR	2023
Dibromoacetic Acid	4.42 µg/L No EPA limit set worst single sample: 4.5 µg/L	9/9	SYR4	2013–2019
TTHM	36.7 µg/L 46% of the EPA limit 80 µg/L worst single sample: 37.9 µg/L	9/9	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	8.328 µg/L 14% of the EPA limit 60 µg/L worst single sample: 8.56 µg/L	9/9	SYR4	2013–2019
Trichloroacetic Acid	1.064 µg/L No EPA limit set worst single sample: 1.1 µg/L	7/9	SYR4	2013–2019
Barium	240 µg/L 12% of the EPA limit 2000 µg/L	6/6	SYR4	2014–2017
Fluoride	247.5 µg/L 6.2% of the EPA limit 4000 µg/L worst single sample: 250 µg/L	6/6	SYR4	2014–2017
Nitrate	140 µg/L 1.4% of the EPA limit 10000 µg/L	6/30	SYR4	2013–2019
Combined Radium (-226 And -228)	3.8386 pCi/L 77% of the EPA limit 5 pCi/L worst single sample: 4.189 pCi/L	4/4	SYR4	2014–2017
Dichloroacetic Acid	2.04 µg/L No EPA limit set worst single sample: 2.1 µg/L	4/9	SYR4	2013–2019
Monobromoacetic Acid	1.655 µg/L No EPA limit set worst single sample: 1.7 µg/L	4/9	SYR4	2013–2019
Arsenic	1.96 µg/L 20% of the EPA limit 10 µg/L worst single sample: 2 µg/L	3/6	SYR4	2014–2017
Gross Alpha, Excl. Radon And U	3.54 pCi/L 24% of the EPA limit 15 pCi/L	1/1	SYR4	2014
Tetrachloroethylene	2.1 µg/L 42% of the EPA limit 5 µg/L	1/13	SYR4	2013–2019
Trichloroethylene	1.1 µg/L 22% of the EPA limit 5 µg/L	1/13	SYR4	2013–2019

53 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Town of Brookfield San Dist 4

Is Town of Brookfield San Dist 4 tap water safe to drink?

EPA monitoring detected 21 contaminants in Town of Brookfield San Dist 4's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Town of Brookfield San Dist 4's water?

EPA monitoring detected Copper, Lead, Bromodichloromethane, Dibromochloromethane, Bromoform, and others. The full list with the level and data source for each is above.

How many people does Town of Brookfield San Dist 4 serve?

Town of Brookfield San Dist 4 reports serving 6,419 people in Wisconsin, per its EPA record.

Has Town of Brookfield San Dist 4 had any water quality violations?

The EPA has 215 violations on file for Town of Brookfield San Dist 4, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.