Public water system record
City of Boulder
Serves Boulder, Jefferson County, MT · 1,400 people served
Federal records show 1 health-based violation and 8 monitoring/reporting issues for City of Boulder in the last ten years. The most serious issue in this window was a resolved Surface Water Treatment Rule violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 8
Key facts
- City of Boulder draws water from 2 wells.
- Most recent formal enforcement: civil case filed in court by Montana, May 2006.
- Record on file since 1998, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 290 unknown out of 640 service lines.
Check whether City of Boulder 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 |
|---|---|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jul 1, 2022 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Sep 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2003 |
Active
Enforcement action in place
|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2002 |
Active
Enforcement action in place
|
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2002 |
Active
Enforcement action in place
|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2001 |
Active
Enforcement action in place
|
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2001 |
Active
Enforcement action in place
|
Full record since 1998
EPA's records for City of Boulder go back to 1998. Before October 19, 2016 they list 5 health-based violations (5 resolved) and 78 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 1 |
| 2000s | 5 | 44 |
| 2010 to October 18, 2016 | 0 | 33 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 1 | 2 |
Most recent health-based violation before October 19, 2016: Total Coliform, began September 2006, Resolved.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2006 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jun 1, 2006 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2002 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Oct 1, 2000 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2000 | Resolved |
Enforcement actions
Montana regulators took 1 formal enforcement action against City of Boulder and issued 1 boil water order between 2000 and 2006. The most recent was a civil case filed in court in May 2006.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 15, 2006 | Montana | Civil case filed in court | 38 violations: Lead and Copper Rule |
| Dec 16, 2000 | Montana | Boil water order | 2 violations (2 health-based): Total Coliform |
What the violations mean
Surface Water Treatment Rule
1 incidentThe system did not complete a treatment step or action that the Surface Water Treatment Rule requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
City of Boulder draws water from 2 wells.
Annual water quality report
City of Boulder 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 Montana.
Certified drinking water labs by state EPA guidance for private wells