Public water system record
Butte Silverbow Water Dept
Serves Butte and Walkerville, Silver Bow County, MT · 33,000 people served
Federal records show 1 health-based violation and 3 monitoring/reporting issues for Butte Silverbow Water Dept 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
- 3
Key facts
- Butte Silverbow Water Dept draws water from 5 surface water intakes and 3 reservoirs.
- Most recent formal enforcement: compliance order (no penalty) by Montana, November 2013.
- Record on file since 1992, with 4 health-based violations before October 19, 2016.
- Lead pipe inventory: 20 lead and 12,774 unknown out of 16,583 service lines.
Check whether Butte Silverbow Water Dept 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 | Apr 24, 2012 | 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 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
Full record since 1992
EPA's records for Butte Silverbow Water Dept go back to 1992. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 81 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 12 |
| 2000s | 0 | 45 |
| 2010 to October 18, 2016 | 3 | 24 |
| 2020s | 0 | 3 |
Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began April 2012, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
Apr 24, 2012 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 63 µg/L, federal limit 60 µg/L (1.1 times the limit)
|
Apr 1, 2011 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 60.6 µg/L, federal limit 60 µg/L (at or just above the limit)
|
Jul 1, 2010 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 1992 | Resolved |
Enforcement actions
Montana regulators took 1 formal enforcement action against Butte Silverbow Water Dept in 2013. The most recent was a compliance order (no penalty) in November 2013.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Nov 20, 2013 | Montana | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
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
Butte Silverbow Water Dept draws water from 5 surface water intakes and 3 reservoirs. 5 smaller public systems such as schools, businesses or campgrounds buy water from Butte Silverbow Water Dept.
Annual water quality report
Butte Silverbow Water Dept 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 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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