Public water system record
Wilsall Water District
Serves Wilsall, Park County, MT · 250 people served
Federal records show 4 health-based violations and 2 monitoring/reporting issues for Wilsall Water District in the last ten years, including an unresolved Surface Water Treatment Rule violation.
System profile
- Health-based violations, last 10 years
- 4
- Resolved
- 3
- Unresolved
- 1
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 2
Key facts
- Wilsall Water District draws water from 2 wells.
- Most recent formal enforcement: compliance order (no penalty) by Montana, August 2020.
- Record on file since 1993, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 2 unknown out of 130 service lines.
Check whether Wilsall Water District 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 | Oct 1, 2025 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2025 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 3, 2019 |
Active
Enforcement action in place
|
No |
|
Nitrate-Nitrite
Contaminant limit exceeded
|
330 | Apr 1, 2018 | Resolved | Yes |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Monitoring and reporting
|
Sep 1, 2025 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Aug 1, 2025 | Resolved |
Full record since 1993
EPA's records for Wilsall Water District go back to 1993. Before October 19, 2016 they list no health-based violations and 47 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 11 |
| 2000s | 0 | 30 |
| 2010 to October 18, 2016 | 0 | 6 |
| October 19, 2016 to 2019 | 2 | 0 |
| 2020s | 2 | 2 |
Enforcement actions
Montana regulators took 2 formal enforcement actions against Wilsall Water District and issued 1 boil water order between 1993 and 2020. The most recent was a compliance order (no penalty) in August 2020.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 26, 2020 | Montana | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
| Oct 17, 1994 | Montana | Signed compliance agreement | 6 violations: Total Coliform |
| Aug 31, 1993 | Montana | Boil water order | 2 violations: Total Coliform |
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.
Nitrate-Nitrite
1 incidentTest results for Nitrate-Nitrite were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about this violation.
Where the water comes from
Wilsall Water District draws water from 2 wells.
Annual water quality report
Wilsall Water District 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 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Wilsall Water District for a copy.
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