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Tap water quality report

West Allis Waterworks

EPA monitoring tested this supplier for 44 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

44
contaminants tested
13
detected
63,240
people served
0
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
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.

0
health-based violations
9
violations on file
0
still open
ViolationTypeStatusPeriod
Other Monitoring Resolved 2014-10-01
Other Monitoring Resolved 2014-10-01
MR Monitoring Resolved 2012-01-01
Other Monitoring Resolved 2001-07-01
MR Monitoring Resolved 1995-04-01 → 1995-04-30
MR Monitoring Resolved 1995-04-01 → 1995-04-30
MR Monitoring Resolved 1995-04-01 → 1995-04-30
MR Monitoring Resolved 1995-04-01 → 1995-04-30
MR Monitoring Resolved 1991-12-31 → 1992-06-30

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
TTHM
15.4225 µg/L 19%
of the EPA limit 80 µg/L
worst single sample: 17.75 µg/L
140/140 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
5.394 µg/L 9%
of the EPA limit 60 µg/L
worst single sample: 6.88 µg/L
140/140 SYR4 2012–2019
Dibromochloromethane
3.21 µg/L
No EPA limit set
worst single sample: 3.8 µg/L
139/140 SYR4 2012–2019
Bromodichloromethane
5.4 µg/L
No EPA limit set
worst single sample: 5.8 µg/L
135/140 SYR4 2012–2019
Chloroform
6.4 µg/L
No EPA limit set
worst single sample: 9.1 µg/L
132/140 SYR4 2012–2019
Dibromoacetic Acid
0.8100 µg/L
No EPA limit set
worst single sample: 0.9900 µg/L
119/140 SYR4 2012–2019
Trichloroacetic Acid
1.56 µg/L
No EPA limit set
worst single sample: 2.1 µg/L
109/140 SYR4 2012–2019
Dichloroacetic Acid
3.3 µg/L
No EPA limit set
worst single sample: 4.3 µg/L
107/140 SYR4 2012–2019
Lead
7.385 µg/L 49%
of the EPA limit 15 µg/L
worst single sample: 240 µg/L
60/60 SYR4 2014–2017
Copper
87.2 µg/L 6.7%
of the EPA limit 1300 µg/L
worst single sample: 480 µg/L
57/60 SYR4 2014–2017
Monobromoacetic Acid
0.6860 µg/L
No EPA limit set
worst single sample: 0.7400 µg/L
19/140 SYR4 2012–2019
Lead
0.0024 mg/L 16%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2023
Bromoform
0.6460 µg/L
No EPA limit set
worst single sample: 0.6500 µg/L
2/140 SYR4 2012–2019
31 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaHfpo-DaMonochloroacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Frequently asked questions about West Allis Waterworks

Is West Allis Waterworks tap water safe to drink?

EPA monitoring detected 13 contaminants in West Allis 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 West Allis Waterworks's water?

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

How many people does West Allis Waterworks serve?

West Allis Waterworks reports serving 63,240 people in Wisconsin, per its EPA record.

Has West Allis Waterworks had any water quality violations?

The EPA has 9 violations on file for West Allis Waterworks, 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.