Piegan Border Station
PWSID: MT0003334
System Details
| Population Served | 94 |
| Service Connections | 21 |
| Water Source | Surface Water |
| System Type | Community Water System |
| Owner | Federal |
| Status | Active |
| City | Helena |
| Zip Code | 59626 |
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|
| Copper (90th percentile) | 1.4000 mg/L | 1.300 mg/L | EXCEEDS Action Level |
| Lead (90th percentile) | 0.0080 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0070 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0060 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0040 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0030 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0030 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0030 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0020 mg/L | 0.015 mg/L | Below Action Level |
1 Active Violations
| Contaminant | Violation | Date | Health-Based | Status |
|---|
| | 2025-10-01 | | Open |
Violation History (39 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|
| | 2025-01-01 | Major | Returned to Compliance |
| | 2025-01-01 | Major | Returned to Compliance |
| | 2025-01-01 | Major | Acknowledged |
| | 2025-01-01 | Major | Acknowledged |
| | 2024-12-30 | | Returned to Compliance |
| | 2022-07-01 | | Returned to Compliance |
| | 2022-07-01 | | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2018-01-01 | Major | Returned to Compliance |
| | 2014-07-01 | | Returned to Compliance |
| | 2014-04-01 | | Returned to Compliance |
| | 2013-07-01 | Yes | Returned to Compliance |
| | 2013-07-01 | | Returned to Compliance |
| | 2013-01-01 | | Returned to Compliance |
| | 2012-10-01 | | Returned to Compliance |
| | 2012-07-01 | | Returned to Compliance |
| | 2012-07-01 | | Returned to Compliance |
| | 2012-04-01 | | Returned to Compliance |