Public water system record
Montello Waterworks
Serves Montello, Marquette County, WI · 1,329 people served
Federal records show 2 health-based violations and 4 monitoring/reporting issues for Montello Waterworks in the last ten years. The most serious issue in this window was a resolved Groundwater Rule violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 2
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 4
Key facts
- Montello Waterworks draws water from 2 wells.
- Most recent enforcement action: boil water order by Wisconsin, June 2009.
- Record on file since 1993, with 4 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 594 unknown out of 638 service lines.
Check whether Montello 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.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
140 | Apr 29, 2025 | Resolved | No |
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2025 | Active |
|
Public Notice
OTHER
|
Oct 17, 2024 | Active |
|
Public Notice
OTHER
|
Oct 17, 2024 | Active |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Resolved |
Full record since 1993
EPA's records for Montello Waterworks go back to 1993. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 3 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 3 | 1 |
| 2000s | 1 | 0 |
| 2010 to October 18, 2016 | 0 | 2 |
| 2020s | 2 | 4 |
Most recent health-based violation before October 19, 2016: Total Coliform (acute), began June 2009, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform (acute)
Contaminant limit exceeded
|
Jun 1, 2009 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jul 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1993 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1993 | Resolved |
Enforcement actions
Wisconsin regulators issued 1 boil water order to Montello Waterworks in 2009. The most recent was a boil water order in June 2009.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jun 24, 2009 | Wisconsin | Boil water order | 1 violation (1 health-based): Total Coliform |
What the violations mean
Groundwater Rule
1 incidentThe system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).
The utility had to notify customers about this violation.
LEAD AND COPPER RULE REVISIONS
1 incidentThe system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
Montello Waterworks draws water from 2 wells.
Annual water quality report
Montello 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