- EPA's UCMR 5 testing looked for 30 contaminants here and found none.
- Lead, 90th percentile: 0.56 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jul 1, 2024–Dec 31, 2024). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Oct 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Oct 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jul 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jul 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Apr 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Apr 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Apr 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Apr 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Jan 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Jan 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jan 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jan 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jan 2023–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Oct 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Oct 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Oct 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Oct 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Oct 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jul 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jul 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Jul 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Jul 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Jul 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jul 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Apr 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Apr 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Apr 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Apr 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Apr 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Apr 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Jan 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Jan 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Jan 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jan 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jan 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jan 2022–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Oct 2021–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Oct 2021–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Oct 2021–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Oct 2021–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Oct 2021–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Oct 2021–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Jul 2021–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Jul 2021–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jul 2021–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jul 2021–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Gross Alpha, Excl. Radon and U, Jul 2021–Oct 2023 (EPA SDWIS)
- Health-based violation: Radionuclides and Revised Rad Rule, Combined Radium (-226 and -228), Jul 2021–Oct 2023 (EPA SDWIS)
Public EPA test results
Can you drink Waukesha tap water? What EPA records show
EPA WI2680238 · serves Waukesha, WI · about 70,718 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
Waukesha Water Utility (EPA WI2680238)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Waukesha's main utility, Waukesha Water Utility: 48 health-based violations since July 1, 2021 in EPA records (EPA SDWIS). PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
What EPA records show for Waukesha Water Utility, as of October 14, 2026
48 health-based violations since July 1, 2021 in EPA records (EPA SDWIS).
Lead, 90th percentile: 0.56 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jul 1, 2024–Dec 31, 2024). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found none.
PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Waukesha Water Utility use chloramine?
We didn't find chloramine in Waukesha Water Utility's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)
Source: EPA SDWIS (ECHO SDWA bulk download), data as of Oct 14, 2026
Source: EPA UCMR 5 occurrence data, data as of Oct 15, 2026
These are EPA's public records for this water system, shown as of October 14, 2026. If you represent this utility, or think a record here is wrong, tell us: Report an error. If the error is in EPA's own records, your state drinking water program can correct it there, and this page updates at our next data refresh.
Sources
- EPA ECHO detailed facility report: Waukesha Water Utility (WI2680238), July to September 2026 extract
- EPA SDWIS (ECHO SDWA bulk download), July to September 2026 extract
- EPA UCMR 5 occurrence data, samples through June 2026
Questions people ask
Is Waukesha tap water safe to drink?
We don't give a safe or unsafe verdict. Here is what the public data shows: EPA records for Waukesha's main utility, Waukesha Water Utility, as of October 14, 2026. 48 health-based violations since July 1, 2021 in EPA records (EPA SDWIS). PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing. A guideline and a legal limit are different things, and this is public data, not a test of your tap.
Which utility supplies water in Waukesha?
Waukesha Water Utility is the main utility for Waukesha in EPA's records (EPA WI2680238), serving about 70,718 people (EPA SDWIS). Your water bill names your utility.
Does Waukesha tap water contain PFAS?
PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing. This is public data, not a test of your tap.
How recent is this data?
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026. Data may be one to three years old and may not reflect the water at your tap. If you want your own tap tested, use a state-certified laboratory.
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