Public water system record
Mequon Water Utility
Serves Mequon, Ozaukee County, WI · 11,152 people served
Federal records show no health-based violations and 2 monitoring/reporting issues for Mequon Water Utility in the last ten years.
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
- Mequon Water Utility buys its water from Milwaukee Waterworks and North Shore Water Commission.
- Most recent enforcement action: boil water order by Wisconsin, August 1998.
- Record on file since 1993, with 4 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 4,732 service lines.
Check whether Mequon Water 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.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
May 1, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2018 | Resolved |
Full record since 1993
EPA's records for Mequon Water Utility go back to 1993. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 24 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 3 | 18 |
| 2000s | 0 | 4 |
| 2010 to October 18, 2016 | 1 | 2 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Nickel, began January 2010, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Nickel
Contaminant limit exceeded
|
Jan 1, 2010 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1998 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1997 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Jun 1, 1996 | Resolved |
Enforcement actions
Wisconsin regulators issued 1 boil water order to Mequon Water Utility in 1998. The most recent was a boil water order in August 1998.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 17, 1998 | Wisconsin | Boil water order | 1 violation (1 health-based): Total Coliform |
Where the water comes from
Mequon Water Utility buys its water from Milwaukee Waterworks and North Shore Water Commission. It lists no wells or intakes of its own.
Buys water from
- Milwaukee Waterworks Milwaukee, WI
- North Shore Water Commission Milwaukee, WI
Annual water quality report
Mequon Water 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.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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