Public water system record
Assiniboine & Sioux Rural Water System
Serves an area of Roosevelt County, MT · 1,726 people served
Federal records show no health-based violations and 5 monitoring/reporting issues for Assiniboine & Sioux Rural Water System 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
- 5
Key facts
- Assiniboine & Sioux Rural Water System draws water from 1 surface water intake.
- Record on file since 2013, with 7 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 619 unknown out of 1,004 service lines.
Check whether Assiniboine & Sioux Rural Water System 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
|
Apr 1, 2025 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Sep 1, 2023 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Sep 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2018 | Resolved |
Full record since 2013
EPA's records for Assiniboine & Sioux Rural Water System go back to 2013. Before October 19, 2016 they list 7 health-based violations (7 resolved) and no monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2010 to October 18, 2016 | 7 | 0 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 4 |
Most recent health-based violation before October 19, 2016: CARBON, TOTAL, began April 2015, Resolved.
Show all 7 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2015 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2015 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2014 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2014 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2014 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jun 1, 2013 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jun 1, 2013 | Resolved |
Where the water comes from
Assiniboine & Sioux Rural Water System draws water from 1 surface water intake. 6 other community water systems buy water from Assiniboine & Sioux Rural Water System.
Community systems that buy water from it
- City of Poplar Poplar, MT
- City of Wolf Point Wolf Point, MT
- Dry Prairie Rural Water Authority Culbertson, MT
- Fort Kipp Subdivision Water System Wolf Point, MT
- Frazer Water System Wolf Point, MT
- Town of Brockton Wolf Point, MT
Annual water quality report
Assiniboine & Sioux Rural Water System 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 EPA Region 8.
Certified drinking water labs by state EPA guidance for private wells