Is Brown Deer Waterworks Tap Water Safe? Quality Report

Water source: SWP
Ownership: Local government
Counties served: Milwaukee

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

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-08-01 → 2011-08-31
MCL	Health-based	Resolved	2011-08-01 → 2011-08-31
MCL	Health-based	Resolved	2011-08-01 → 2011-08-31
MCL	Health-based	Resolved	2011-08-01 → 2011-08-31
MCL	Health-based	Resolved	2011-08-01 → 2011-08-31

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Bromodichloromethane	6.8 µg/L No EPA limit set	123/123	SYR4	2012–2019
Chloroform	9.2 µg/L No EPA limit set	123/123	SYR4	2012–2019
Dibromochloromethane	3.8 µg/L No EPA limit set	123/123	SYR4	2012–2019
TTHM	19.35 µg/L 24% of the EPA limit 80 µg/L	123/123	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	9.6 µg/L 16% of the EPA limit 60 µg/L	123/123	SYR4	2012–2019
Trichloroacetic Acid	1.9 µg/L No EPA limit set	105/123	SYR4	2012–2019
Dibromoacetic Acid	1.4 µg/L No EPA limit set	86/123	SYR4	2012–2019
Dichloroacetic Acid	5.3 µg/L No EPA limit set	83/123	SYR4	2012–2019
Copper	180 µg/L 14% of the EPA limit 1300 µg/L	34/60	SYR4	2014–2017
Lead	12 µg/L 80% of the EPA limit 15 µg/L	21/60	SYR4	2014–2017
Lead	0.00090 mg/L 6% of the EPA limit 0.0150 mg/L	16/16	LCR	2023
Monobromoacetic Acid	0.6300 µg/L No EPA limit set	16/123	SYR4	2012–2019
Bromoform	0.5500 µg/L No EPA limit set	2/123	SYR4	2012–2019
Monochloroacetic Acid	1.5 µg/L No EPA limit set	1/123	SYR4	2012–2019

30 contaminants tested, none detected

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Utility contact

Frequently asked questions about Brown Deer Waterworks

Is Brown Deer Waterworks tap water safe to drink?

EPA monitoring detected 14 contaminants in Brown Deer Waterworks'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 Brown Deer Waterworks's water?

EPA monitoring detected Bromodichloromethane, Chloroform, Dibromochloromethane, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Brown Deer Waterworks serve?

Brown Deer Waterworks reports serving 12,741 people in Wisconsin, per its EPA record.

Has Brown Deer Waterworks had any water quality violations?

The EPA has 76 violations on file for Brown Deer Waterworks, of which 20 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.