Public water system record
Mukwonago Waterworks
Serves Mukwonago, Waukesha County, WI · 8,190 people served
Federal records show no health-based violations and 2 monitoring/reporting issues for Mukwonago Waterworks in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 2
Key facts
- Mukwonago Waterworks draws water from 4 wells.
- Most recent formal enforcement: compliance order (no penalty) by Wisconsin, November 2002.
- Record on file since 1984, with 15 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 1,467 unknown out of 3,188 service lines.
Check whether Mukwonago Waterworks 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.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Oct 1, 2011 | Active |
|
Public Notice
OTHER
|
Oct 1, 2011 | Active |
Full record since 1984
EPA's records for Mukwonago Waterworks go back to 1984. Before October 19, 2016 they list 15 health-based violations (12 resolved, 3 archived by EPA without a recorded fix) and 93 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 3 | 0 |
| 1990s | 8 | 26 |
| 2000s | 4 | 55 |
| 2010 to October 18, 2016 | 0 | 12 |
Most recent health-based violation before October 19, 2016: Gross Alpha, Excl. Radon and U, began January 2001, Resolved.
Show all 15 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jan 1, 2001 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 2001 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jan 1, 2000 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 2000 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jan 1, 1999 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 1999 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jan 1, 1997 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 1997 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Oct 1, 1996 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Oct 1, 1995 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jan 1, 1994 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jan 1, 1994 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Oct 1, 1984 | Archived |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
Jun 1, 1984 | Archived |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
|
May 25, 1984 | Archived |
Enforcement actions
Wisconsin regulators took 1 formal enforcement action against Mukwonago Waterworks in 2002, filed as 14 records in EPA's data. The most recent was a compliance order (no penalty) in November 2002.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Nov 18, 2002 | Wisconsin | Compliance order (no penalty) | 19 violations (12 health-based): Gross Alpha, Excl. Radon and U, Combined Radium (-226 and -228), Radium-228, Radium-226 |
Where the water comes from
Mukwonago Waterworks draws water from 4 wells.
Annual water quality report
Mukwonago Waterworks 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