Public water system record
Town of Westby
Serves Westby, Sheridan County, MT · 172 people served
Federal records show no health-based violations and 4 monitoring/reporting issues for Town of Westby in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 4
Key facts
- Town of Westby buys its water from Dry Prairie Rural Water Authority.
- Most recent formal enforcement: administrative penalty by Montana, February 2012.
- Record on file since 1993, with 11 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 1 unknown out of 148 service lines.
Check whether Town of Westby 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.
None since October 2016.
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, 2022 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jul 1, 2019 | Resolved |
|
Arsenic
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
Full record since 1993
EPA's records for Town of Westby go back to 1993. Before October 19, 2016 they list 11 health-based violations (11 resolved) and 165 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 74 |
| 2000s | 0 | 24 |
| 2010 to October 18, 2016 | 10 | 67 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 0 | 2 |
Most recent health-based violation before October 19, 2016: Arsenic, began January 2015, Resolved.
Show all 11 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Jan 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Oct 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Jul 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Apr 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.032 mg/L, federal limit 0.01 mg/L (3.2 times the limit)
|
Jul 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.029 mg/L, federal limit 0.01 mg/L (2.9 times the limit)
|
Apr 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.01 mg/L (9.3 times the limit)
|
Jan 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Jul 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
Apr 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.024 mg/L, federal limit 0.01 mg/L (2.4 times the limit)
|
Jan 1, 2011 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1996 | Resolved |
Enforcement actions
Montana regulators took 2 formal enforcement actions against Town of Westby between 2011 and 2012, filed as 5 records in EPA's data. The most recent was an administrative penalty in February 2012.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Feb 22, 2012 | Montana | Administrative penalty | 9 violations (8 health-based): Arsenic |
| Dec 12, 2011 | Montana | Compliance order (no penalty) | 11 violations (11 health-based): Arsenic |
Where the water comes from
Town of Westby buys its water from Dry Prairie Rural Water Authority. It lists no wells or intakes of its own.
Buys water from
- Dry Prairie Rural Water Authority Culbertson, MT
Annual water quality report
Town of Westby 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 Town of Westby 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