Public water system record
Pewaukee City Water and Sewer Utility
Serves Pewaukee city and Pewaukee village, Waukesha County, WI · 8,671 people served
Federal records show 16 health-based violations and 55 monitoring/reporting issues for Pewaukee City Water and Sewer Utility in the last ten years. The most serious issue in this window was a Gross Alpha, Excl. Radon and U violation that EPA lists as archived, not resolved.
System profile
Source water
Groundwater
ZIP
53072
EPA system ID
WI2680214
- Health-based violations, last 10 years
- 16
- Resolved
- 6
- Unresolved
- 0
- Archived by EPA
- 10
- Any acute record
- No
- Monitoring issues, last 10 years
- 55
Key facts
- Pewaukee City Water and Sewer Utility draws water from 12 wells.
- Highest measured level in the last 10 years: Gross Alpha, Excl. Radon and U, 26.95 pCi/L, federal limit 15 pCi/L (1.8 times the limit), 2025.
- Most recent formal enforcement: compliance order (no penalty) by Wisconsin, August 2025.
- Record on file since 1983, with 11 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 118 unknown out of 3,545 service lines.
Check whether Pewaukee City Water and Sewer Utility serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 20.03 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
|
340 | Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 21.65 pCi/L, federal limit 15 pCi/L (1.4 times the limit)
|
340 | Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 24.45 pCi/L, federal limit 15 pCi/L (1.6 times the limit)
|
340 | Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 26.95 pCi/L, federal limit 15 pCi/L (1.8 times the limit)
|
340 | Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 24.8 pCi/L, federal limit 15 pCi/L (1.7 times the limit)
|
340 | Oct 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 23.2 pCi/L, federal limit 15 pCi/L (1.5 times the limit)
|
340 | Jul 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 21.1 pCi/L, federal limit 15 pCi/L (1.4 times the limit)
|
340 | Apr 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 17.45 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
|
340 | Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 17.43 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
|
340 | Oct 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.75325 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Jul 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.61 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Apr 1, 2018 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.2 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Jan 1, 2018 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.2 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Oct 1, 2017 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.48 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
340 | Jul 1, 2017 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.94 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Apr 1, 2017 | Resolved | No |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.57 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
340 | Jan 1, 2017 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Aug 18, 2025 | Active |
|
Public Notice
OTHER
|
Aug 18, 2025 | Active |
|
Public Notice
OTHER
|
Mar 3, 2025 | Resolved |
|
Public Notice
OTHER
|
Nov 18, 2024 | Active |
|
Public Notice
OTHER
|
Aug 29, 2024 | Resolved |
|
Public Notice
OTHER
|
Jul 16, 2024 | Active |
|
Styrene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Radium-228
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Selenium
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Nitrite
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Nitrate-Nitrite
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Nickel
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Mercury
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Fluoride
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Barium
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Cadmium
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Public Notice
OTHER
|
Aug 8, 2019 | Resolved |
|
Radium-228
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Radium-226
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Public Notice
OTHER
|
Feb 26, 2018 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Radium-228
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Radium-226
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Public Notice
OTHER
|
Nov 29, 2017 | Resolved |
|
Public Notice
OTHER
|
Aug 24, 2017 | Resolved |
|
Public Notice
OTHER
|
Jan 4, 2017 | Resolved |
Full record since 1983
EPA's records for Pewaukee City Water and Sewer Utility go back to 1983. Before October 19, 2016 they list 11 health-based violations (8 resolved, 3 archived by EPA without a recorded fix) and 15 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 3 | 0 |
| 1990s | 0 | 3 |
| 2000s | 0 | 11 |
| 2010 to October 18, 2016 | 8 | 1 |
| October 19, 2016 to 2019 | 7 | 12 |
| 2020s | 9 | 43 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began October 2015, Resolved.
Show all 11 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.55 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Oct 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.55 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Jul 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.66 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Apr 1, 2015 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16.91 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Oct 1, 2014 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 20.3 pCi/L, federal limit 15 pCi/L (1.4 times the limit)
|
Jul 1, 2014 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18.34 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
|
Apr 1, 2014 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 17.69 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
|
Jan 1, 2014 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16.26 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
|
Oct 1, 2013 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Oct 1, 1984 | Archived |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Sep 12, 1983 | Archived |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Sep 12, 1983 | Archived |
Enforcement actions
Wisconsin regulators took 19 formal enforcement actions against Pewaukee City Water and Sewer Utility between 2014 and 2025, filed as 47 records in EPA's data. The most recent was a compliance order (no penalty) in August 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 19, 2025 | Wisconsin | Compliance order (no penalty) | 3 violations (3 health-based): Gross Alpha, Excl. Radon and U |
| Jun 18, 2025 | Wisconsin | Compliance order (no penalty) | 3 violations (3 health-based): Gross Alpha, Excl. Radon and U |
| Mar 4, 2025 | Wisconsin | Compliance order (no penalty) | 3 violations (3 health-based): Gross Alpha, Excl. Radon and U |
| Nov 19, 2024 | Wisconsin | Compliance order (no penalty) | 3 violations (3 health-based): Gross Alpha, Excl. Radon and U |
| Aug 30, 2024 | Wisconsin | Compliance order (no penalty) | 3 violations (3 health-based): Gross Alpha, Excl. Radon and U |
| Jul 17, 2024 | Wisconsin | Compliance order (no penalty) | 3 violations (3 health-based): Gross Alpha, Excl. Radon and U |
| Mar 26, 2024 | Wisconsin | Compliance order (no penalty) | 3 violations (3 health-based): Gross Alpha, Excl. Radon and U |
| Dec 12, 2023 | Wisconsin | Compliance order (no penalty) | 2 violations (2 health-based): Gross Alpha, Excl. Radon and U |
| May 8, 2023 | Wisconsin | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
| May 11, 2021 | Wisconsin | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
| Sep 30, 2020 | Wisconsin | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
| Feb 27, 2018 | Wisconsin | Compliance order (no penalty) | 2 violations (2 health-based): Combined Radium (-226 and -228) |
| Nov 30, 2017 | Wisconsin | Compliance order (no penalty) | 3 violations (3 health-based): Combined Radium (-226 and -228) |
| Aug 25, 2017 | Wisconsin | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
| Jun 21, 2017 | Wisconsin | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
| Jan 5, 2017 | Wisconsin | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
| Feb 22, 2016 | Wisconsin | Compliance order (no penalty) | 3 violations (3 health-based): Combined Radium (-226 and -228) |
| Sep 17, 2015 | Wisconsin | Compliance order (no penalty) | 5 violations (5 health-based): Gross Alpha, Excl. Radon and U |
| Dec 3, 2014 | Wisconsin | Compliance order (no penalty) | 5 violations (5 health-based): Gross Alpha, Excl. Radon and U |
What the violations mean
Gross Alpha, Excl. Radon and U
9 incidentsTest results for Gross Alpha, Excl. Radon and U were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about each of these violations.
Combined Radium (-226 and -228)
7 incidentsTest results for Combined Radium (-226 and -228) were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Pewaukee City Water and Sewer Utility draws water from 12 wells.
Annual water quality report
Pewaukee City Water and Sewer Utility must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Wisconsin.
Certified drinking water labs by state EPA guidance for private wells