Public water system record
City of Three Forks
Serves Three Forks, Gallatin County, MT · 1,900 people served
Federal records show 1 health-based violation and 1 monitoring/reporting issue for City of Three Forks in the last ten years. The most serious issue in this window was a resolved Arsenic violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- City of Three Forks draws water from 6 wells.
- Highest measured level in the last 10 years: Arsenic, 0.067 mg/L, federal limit 0.01 mg/L (6.7 times the limit), 2019.
- Record on file since 1980, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 3 lead and 94 unknown out of 961 service lines.
Check whether City of Three Forks 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 |
|---|---|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.067 mg/L, federal limit 0.01 mg/L (6.7 times the limit)
|
330 | Jan 1, 2019 | 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
|
Jul 1, 2019 | Resolved |
Full record since 1980
EPA's records for City of Three Forks go back to 1980. Before October 19, 2016 they list 1 health-based violation (1 archived by EPA without a recorded fix) and 70 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 1 | 1 |
| 1990s | 0 | 1 |
| 2000s | 0 | 68 |
| October 19, 2016 to 2019 | 1 | 1 |
Most recent health-based violation before October 19, 2016: Arsenic, began January 1980, Archived.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
|
Jan 30, 1980 | Archived |
What the violations mean
Arsenic
1 incidentArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
Where the water comes from
City of Three Forks draws water from 6 wells.
Annual water quality report
City of Three Forks 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