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Tap water quality report

Pewaukee Village Waterworks

EPA monitoring tested this supplier for 75 contaminants and detected 20. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

75
contaminants tested
20
detected
8,166
people served
131
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
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.

131
health-based violations
183
violations on file
12
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2026-01-01 → 2026-03-31
MCL Health-based Archived 2026-01-01 → 2026-03-31
MCL Health-based Archived 2026-01-01 → 2026-03-31
MCL Health-based Archived 2025-10-01 → 2025-12-31
MCL Health-based Archived 2025-10-01 → 2025-12-31
MCL Health-based Archived 2025-10-01 → 2025-12-31
MCL Health-based Archived 2025-07-01 → 2025-09-30
MCL Health-based Archived 2025-07-01 → 2025-09-30
MCL Health-based Archived 2025-07-01 → 2025-09-30
MCL Health-based Archived 2025-04-01 → 2025-06-30

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
860.5 µg/L 66%
of the EPA limit 1300 µg/L
worst single sample: 1800 µg/L
174/177 SYR4 2012–2019
Lead
16.05 µg/L 107%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 120 µg/L
140/177 SYR4 2012–2019
Fluoride
745.6 µg/L 19%
of the EPA limit 4000 µg/L
worst single sample: 870 µg/L
103/199 SYR4 2012–2019
Combined Radium (-226 And -228)
5.3325 pCi/L 107%
of the EPA limit, at the 95th percentile of samples — 5 pCi/L
worst single sample: 6.18 pCi/L
46/46 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
14.2633 pCi/L 95%
of the EPA limit 15 pCi/L
worst single sample: 18.42 pCi/L
46/46 SYR4 2012–2019
Combined Uranium
2.354 µg/L 7.8%
of the EPA limit 30 µg/L
worst single sample: 2.72 µg/L
29/29 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 23/23 LCR 2024
Nitrate
210 µg/L 2.1%
of the EPA limit 10000 µg/L
 12/42 SYR4 2012–2019
Bromodichloromethane
3.035 µg/L
No EPA limit set
worst single sample: 3.8 µg/L
10/12 SYR4 2013–2019
Chloroform
5.21 µg/L
No EPA limit set
worst single sample: 5.3 µg/L
10/13 SYR4 2013–2019
TTHM
11.2475 µg/L 14%
of the EPA limit 80 µg/L
worst single sample: 12.35 µg/L
8/8 SYR4 2013–2019
Barium
110.7 µg/L 5.5%
of the EPA limit 2000 µg/L
worst single sample: 120 µg/L
7/7 SYR4 2014–2017
Dibromochloromethane
2.49 µg/L
No EPA limit set
worst single sample: 2.7 µg/L
7/11 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
1.46 µg/L 2.4%
of the EPA limit 60 µg/L
worst single sample: 1.63 µg/L
6/8 SYR4 2013–2019
Dibromoacetic Acid
0.2375 µg/L
No EPA limit set
worst single sample: 0.2400 µg/L
2/8 SYR4 2013–2019
Dichloroacetic Acid
0.5045 µg/L
No EPA limit set
worst single sample: 0.5200 µg/L
2/8 SYR4 2013–2019
Nitrate-Nitrite
148 µg/L 1.5%
of the EPA limit 10000 µg/L
worst single sample: 150 µg/L
2/5 SYR4 2014–2017
Trichloroacetic Acid
0.8160 µg/L
No EPA limit set
worst single sample: 0.8300 µg/L
2/8 SYR4 2013–2019
Arsenic
1.2 µg/L 12%
of the EPA limit 10 µg/L
 1/7 SYR4 2014–2017
Bromoform
0.8700 µg/L
No EPA limit set
 1/10 SYR4 2013–2019
55 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 AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Pewaukee Village Waterworks

Is Pewaukee Village Waterworks tap water safe to drink?

EPA monitoring detected 20 contaminants in Pewaukee Village 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 Pewaukee Village Waterworks's water?

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

How many people does Pewaukee Village Waterworks serve?

Pewaukee Village Waterworks reports serving 8,166 people in Wisconsin, per its EPA record.

Has Pewaukee Village Waterworks had any water quality violations?

The EPA has 183 violations on file for Pewaukee Village Waterworks, of which 131 are health-based (a contaminant limit or required treatment was breached) and 12 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.