Is Muskego Water Utility 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

103

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2024-10-17
MCL	Health-based	Resolved	2005-06-01 → 2005-06-30
MCL	Health-based	Resolved	2005-06-01 → 2005-06-30
MCL	Health-based	Resolved	2005-06-01 → 2005-06-30
MCL	Health-based	Resolved	2005-06-01 → 2005-06-30
Other	Monitoring	Unaddressed	2024-10-17
MR	Monitoring	Resolved	2024-01-01
MR	Monitoring	Resolved	2024-01-01
Other	Monitoring	Unaddressed	2023-07-01
MR	Monitoring	Resolved	2023-04-01 → 2023-06-30

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	474.4 µg/L 36% of the EPA limit 1300 µg/L worst single sample: 1170 µg/L	39/40	SYR4	2014–2017
Combined Radium (-226 And -228)	4.302 pCi/L 86% of the EPA limit 5 pCi/L worst single sample: 4.66 pCi/L	29/29	SYR4	2012–2017
Gross Alpha, Excl. Radon And U	14.8 pCi/L 99% of the EPA limit 15 pCi/L worst single sample: 18.1 pCi/L	21/21	SYR4	2012–2016
Barium	151.2 µg/L 7.6% of the EPA limit 2000 µg/L worst single sample: 160 µg/L	17/17	SYR4	2014–2017
Fluoride	1702 µg/L 43% of the EPA limit 4000 µg/L worst single sample: 1750 µg/L	17/17	SYR4	2014–2017
Gross Beta Particle Activity	10.54 pCi/L No EPA limit set worst single sample: 10.7 pCi/L	17/17	SYR4	2012–2016
Arsenic	6.7175 µg/L 67% of the EPA limit 10 µg/L worst single sample: 6.74 µg/L	16/17	SYR4	2014–2017
Lead	0.0039 mg/L 26% of the EPA limit 0.0150 mg/L	14/14	LCR	2023
Lead	40.19 µg/L 268% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 40.3 µg/L	12/40	SYR4	2014–2017
TTHM	14.11 µg/L 18% of the EPA limit 80 µg/L worst single sample: 16.2 µg/L	12/15	SYR4	2013–2019
Chloroform	4.45 µg/L No EPA limit set worst single sample: 5.5 µg/L	11/37	SYR4	2012–2019
Dibromochloromethane	4.185 µg/L No EPA limit set worst single sample: 4.5 µg/L	10/37	SYR4	2012–2019
Bromodichloromethane	4.7 µg/L No EPA limit set worst single sample: 5.1 µg/L	9/37	SYR4	2012–2019
Bromoform	1.1 µg/L No EPA limit set	6/37	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	4.675 µg/L 7.8% of the EPA limit 60 µg/L worst single sample: 4.9 µg/L	6/15	SYR4	2013–2019
Dichloroacetic Acid	2.18 µg/L No EPA limit set worst single sample: 2.3 µg/L	5/15	SYR4	2013–2019
Combined Uranium	1.50967 µg/L 5% of the EPA limit 30 µg/L worst single sample: 1.54667 µg/L	4/4	SYR4	2014–2015
Dibromoacetic Acid	2.1 µg/L No EPA limit set worst single sample: 2.2 µg/L	3/15	SYR4	2013–2019
Trichloroacetic Acid	1.19 µg/L No EPA limit set worst single sample: 1.2 µg/L	3/15	SYR4	2013–2019

57 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 EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitrateNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Muskego Water Utility

Is Muskego Water Utility tap water safe to drink?

EPA monitoring detected 19 contaminants in Muskego Water Utility'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 Muskego Water Utility's water?

EPA monitoring detected Copper, Combined Radium (-226 And -228), Gross Alpha, Excl. Radon And U, Barium, Fluoride, and others. The full list with the level and data source for each is above.

How many people does Muskego Water Utility serve?

Muskego Water Utility reports serving 8,150 people, per its EPA record.

Has Muskego Water Utility had any water quality violations?

The EPA has 103 violations on file for Muskego Water Utility, of which 5 are health-based (a contaminant limit or required treatment was breached) and 2 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.