Public water system record
City of Miles City
Serves Miles City, Custer County, MT · 9,565 people served
Federal records show 3 health-based violations and 4 monitoring/reporting issues for City of Miles City in the last ten years. The most serious issue in this window was a Surface Water Treatment Rule violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 3
- Resolved
- 2
- Unresolved
- 0
- Archived by EPA
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 4
Key facts
- City of Miles City draws water from 1 surface water intake.
- Most recent formal enforcement: compliance order (no penalty) by Montana, March 2024.
- Record on file since 1993, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 3,588 service lines.
Check whether City of Miles City 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 | Aug 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2022 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2022 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Long Term 2 Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Aug 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Long Term 2 Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Surface Water Treatment Rule
Monitoring and reporting
|
Dec 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2018 | Resolved |
Full record since 1993
EPA's records for City of Miles City go back to 1993. Before October 19, 2016 they list 5 health-based violations (5 resolved) and 28 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 4 | 28 |
| 2000s | 1 | 0 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 3 | 3 |
Most recent health-based violation before October 19, 2016: Total Coliform, began August 2005, Resolved.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2005 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
May 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1994 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
May 1, 1994 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Oct 1, 1993 | Resolved |
Enforcement actions
Montana regulators took 1 formal enforcement action against City of Miles City in 2024. The most recent was a compliance order (no penalty) in March 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Mar 13, 2024 | Montana | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
What the violations mean
Surface Water Treatment Rule
3 incidentsThe 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 each of these violations.
Where the water comes from
City of Miles City draws water from 1 surface water intake. 1 other community water system and 2 smaller public systems such as schools, businesses or campgrounds buy water from City of Miles City.
Community systems that buy water from it
- Custer Co Water and Sewer Dist Miles City, MT
Annual water quality report
City of Miles City 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