Whitehall Town of
PWSID: MT0000359
This system has no unresolved violations. The most recent violation on record was 2025-07-01.
This system has more violations on record than 96% of water systems in Montana.
Violation trend: 11.0 per year over the last 5 years, up from 6.8 per year in the previous 5.
System Details
| Population Served | 1,500 |
| Service Connections | 558 |
| Water Source | Groundwater |
| System Type | Community Water System |
| Owner | Local Government |
| Status | Active |
| City | Whitehall |
| EPA ZIP on File | 59759 |
Areas Served
- Whitehall, Jefferson County
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Lead (90th percentile) | 0.0027 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0020 mg/L | 0.015 mg/L | Below Action Level |
Violation History (101 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 4006 | MCL Measured: 0.0448 MG/L (limit: 0.0300 MG/L) | 2025-07-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0448 MG/L (limit: 0.0300 MG/L) | 2025-07-01 | Yes | Acknowledged |
| 4000 | MCL Measured: 18.00 PCI/L (limit: 15.00 PCI/L) | 2025-07-01 | Yes | Acknowledged |
| 4000 | MCL Measured: 18.00 PCI/L (limit: 15.00 PCI/L) | 2025-07-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 42.00 UG/L (limit: 30.00 UG/L) | 2025-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 44.00 UG/L (limit: 30.00 UG/L) | 2025-01-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 44.00 UG/L (limit: 30.00 UG/L) | 2025-01-01 | Yes | Acknowledged |
| 3014 | MR | 2024-12-26 | Major | Returned to Compliance |
| 3014 | MR | 2024-11-28 | Major | Returned to Compliance |
| 4006 | MCL Measured: 0.0420 MG/L (limit: 0.0300 MG/L) | 2024-10-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0420 MG/L (limit: 0.0300 MG/L) | 2024-10-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0423 MG/L (limit: 0.0300 MG/L) | 2024-07-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0423 MG/L (limit: 0.0300 MG/L) | 2024-07-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0476 MG/L (limit: 0.0300 MG/L) | 2024-07-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0377 MG/L (limit: 0.0300 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0377 MG/L (limit: 0.0300 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0392 MG/L (limit: 0.0300 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0392 MG/L (limit: 0.0300 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0392 MG/L (limit: 0.0300 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0438 MG/L (limit: 0.0300 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0438 MG/L (limit: 0.0300 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0446 MG/L (limit: 0.0300 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0446 MG/L (limit: 0.0300 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0390 MG/L | 2023-10-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0390 MG/L | 2023-10-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0400 MG/L (limit: 0.0300 MG/L) | 2023-10-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0400 MG/L (limit: 0.0300 MG/L) | 2023-10-01 | Yes | Acknowledged |
| 8000 | MON | 2023-08-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-08-01 | Major | Returned to Compliance |
| 4000 | MR | 2023-07-01 | Major | Returned to Compliance |
| 4000 | MR | 2023-07-01 | Major | Returned to Compliance |
| 4006 | MR | 2023-07-01 | Major | Returned to Compliance |
| 4006 | MCL Measured: 30.20 UG/L (limit: 30.00 UG/L) | 2023-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 30.20 UG/L (limit: 30.00 UG/L) | 2023-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 40.40 UG/L (limit: 30.00 UG/L) | 2023-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 40.40 UG/L (limit: 30.00 UG/L) | 2023-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0310 MG/L (limit: 0.0300 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0310 MG/L (limit: 0.0300 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0420 MG/L (limit: 0.0300 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0420 MG/L (limit: 0.0300 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0370 UG/L (limit: 0.0300 UG/L) | 2022-10-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0370 UG/L (limit: 0.0300 UG/L) | 2022-10-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0380 UG/L (limit: 0.0300 UG/L) | 2022-10-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 0.0380 UG/L (limit: 0.0300 UG/L) | 2022-10-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 35.00 UG/L (limit: 30.00 UG/L) | 2022-07-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 35.00 UG/L (limit: 30.00 UG/L) | 2022-07-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 38.00 UG/L (limit: 30.00 UG/L) | 2022-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 38.00 UG/L (limit: 30.00 UG/L) | 2022-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 31.00 UG/L (limit: 30.00 UG/L) | 2022-04-01 | Yes | Acknowledged |
| 4006 | MCL Measured: 31.00 UG/L (limit: 30.00 UG/L) | 2022-04-01 | Yes | Acknowledged |
Showing 50 of 101 historical violations.
Understanding This Water System's Record
Whitehall Town of is a community water system water system that draws from groundwater sources and serves a population of 1,500 in Whitehall, Montana. This page shows its complete compliance history as reported to the EPA's Safe Drinking Water Information System (SDWIS), the federal database that tracks every public water system in the United States.
What Do These Violations Mean?
Health-based violations mean the system exceeded an EPA maximum contaminant level (MCL) or failed to provide required treatment. These indicate potential health risks from contaminants like lead, arsenic, bacteria, nitrates, or disinfection byproducts. Non-health-based violations involve monitoring, reporting, or procedural requirements — the system missed a testing deadline or failed to notify customers, but contaminant levels were not necessarily unsafe.
What Should You Do?
Your water utility is required to publish an annual Consumer Confidence Report (CCR) that details test results and any violations. If your system has active health-based violations, consider a certified water filter rated for the specific contaminants involved. The contaminant guides on this site explain health risks and filter options for common pollutants. For the most current results, contact your water utility directly — EPA data can lag weeks or months behind real-time testing.