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Tap water quality report

Wauwatosa Waterworks

EPA monitoring tested this supplier for 44 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

44
contaminants tested
14
detected
49,064
people served
3
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.

3
health-based violations
10
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1997-09-01 → 1997-09-30
MCL Health-based Resolved 1997-09-01 → 1997-09-30
MCL Health-based Resolved 1997-09-01 → 1997-09-30
MR Monitoring Resolved 2012-01-01
MR Monitoring Resolved 2012-01-01
Other Monitoring Resolved 2008-10-01
Other Monitoring Resolved 2008-10-01
Other Monitoring Resolved 2008-10-01
Other Monitoring Resolved 2002-07-01
Other Monitoring Resolved 2002-07-01

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
Bromodichloromethane
5.285 µg/L
No EPA limit set
worst single sample: 6.5 µg/L
124/124 SYR4 2012–2019
TTHM
15.79 µg/L 20%
of the EPA limit 80 µg/L
worst single sample: 17.54 µg/L
124/124 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
6.03 µg/L 10%
of the EPA limit 60 µg/L
worst single sample: 8.4 µg/L
123/124 SYR4 2012–2019
Chloroform
6.875 µg/L
No EPA limit set
worst single sample: 8.5 µg/L
122/124 SYR4 2012–2019
Dibromochloromethane
3.395 µg/L
No EPA limit set
worst single sample: 3.6 µg/L
122/124 SYR4 2012–2019
Dichloroacetic Acid
3.52 µg/L
No EPA limit set
worst single sample: 4.5 µg/L
97/124 SYR4 2012–2019
Dibromoacetic Acid
0.8725 µg/L
No EPA limit set
worst single sample: 1.3 µg/L
96/124 SYR4 2012–2019
Trichloroacetic Acid
1.73 µg/L
No EPA limit set
worst single sample: 2 µg/L
95/124 SYR4 2012–2019
Copper
164.5 µg/L 13%
of the EPA limit 1300 µg/L
worst single sample: 300 µg/L
58/60 SYR4 2014–2017
Lead
11 µg/L 73%
of the EPA limit 15 µg/L
worst single sample: 22 µg/L
58/60 SYR4 2014–2017
Monobromoacetic Acid
0.5460 µg/L
No EPA limit set
worst single sample: 0.5500 µg/L
23/124 SYR4 2012–2019
Lead
0.0084 mg/L 56%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2023
Bromoform
0.5400 µg/L
No EPA limit set
 2/124 SYR4 2012–2019
Monochloroacetic Acid
1.6 µg/L
No EPA limit set
 1/124 SYR4 2012–2019
30 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaHfpo-DaNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Frequently asked questions about Wauwatosa Waterworks

Is Wauwatosa Waterworks tap water safe to drink?

EPA monitoring detected 14 contaminants in Wauwatosa 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 Wauwatosa Waterworks's water?

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

How many people does Wauwatosa Waterworks serve?

Wauwatosa Waterworks reports serving 49,064 people in Wisconsin, per its EPA record.

Has Wauwatosa Waterworks had any water quality violations?

The EPA has 10 violations on file for Wauwatosa Waterworks, of which 3 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.