Harlem City of
PWSID: MT0000239
This system currently has unresolved violations for: 8000. These violations mean contaminant levels exceeded EPA limits or required treatment was not performed.
This system has more violations on record than 97% of water systems in Montana.
Violation trend: 12.2 per year over the last 5 years, similar to 11.4 per year in the previous 5.
System Details
| Population Served | 820 |
| Service Connections | 375 |
| Water Source | Surface Water |
| System Type | Community Water System |
| Owner | Local Government |
| Status | Active |
| City | Harlem |
| EPA ZIP on File | 59526 |
Areas Served
- Harlem, Blaine County
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Lead (90th percentile) | 0.0010 mg/L | 0.015 mg/L | Below Action Level |
2 Active Violations
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 8000 | TT | 2025-08-26 | Yes | Open |
| 5000 | MR | 2024-10-01 | Open |
Violation History (131 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 7000 | Other | 2025-10-01 | Returned to Compliance | |
| 2950 | MCL Measured: 0.1450 MG/L (limit: 0.0800 MG/L) | 2025-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1560 MG/L (limit: 0.0800 MG/L) | 2025-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1560 MG/L (limit: 0.0800 MG/L) | 2025-07-01 | Yes | Acknowledged |
| 2950 | MR | 2025-04-01 | Major | Returned to Compliance |
| 2456 | MR | 2025-04-01 | Major | Returned to Compliance |
| 2950 | MCL Measured: 0.1580 MG/L (limit: 0.0800 MG/L) | 2025-01-01 | Yes | Acknowledged |
| 8000 | MON | 2024-11-01 | Major | Returned to Compliance |
| 2950 | MCL Measured: 0.1410 MG/L (limit: 0.0800 MG/L) | 2024-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1410 MG/L (limit: 0.0800 MG/L) | 2024-10-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0630 MG/L (limit: 0.0600 MG/L) | 2024-10-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0630 MG/L (limit: 0.0600 MG/L) | 2024-10-01 | Yes | Acknowledged |
| 0800 | TT | 2024-07-01 | Yes | Returned to Compliance |
| 0800 | TT | 2024-07-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 120.00 UG/L (limit: 80.00 UG/L) | 2024-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 120.00 UG/L (limit: 80.00 UG/L) | 2024-07-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 62.00 UG/L (limit: 60.00 UG/L) | 2024-07-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 62.00 UG/L (limit: 60.00 UG/L) | 2024-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1130 MG/L (limit: 0.0800 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1130 MG/L (limit: 0.0800 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1130 MG/L (limit: 0.0800 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1130 MG/L (limit: 0.0800 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0960 MG/L (limit: 0.0800 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0960 MG/L (limit: 0.0800 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0960 MG/L (limit: 0.0800 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0960 MG/L (limit: 0.0800 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0980 MG/L (limit: 0.0800 MG/L) | 2023-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0980 MG/L (limit: 0.0800 MG/L) | 2023-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0980 MG/L (limit: 0.0800 MG/L) | 2023-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1050 MG/L (limit: 0.0800 MG/L) | 2023-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1050 MG/L (limit: 0.0800 MG/L) | 2023-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1090 MG/L (limit: 0.0800 MG/L) | 2023-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1090 MG/L (limit: 0.0800 MG/L) | 2023-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1090 MG/L (limit: 0.0800 MG/L) | 2023-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1090 MG/L (limit: 0.0800 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1090 MG/L (limit: 0.0800 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1090 MG/L (limit: 0.0800 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 8000 | MON | 2022-11-01 | Major | Returned to Compliance |
| 8000 | MON | 2022-11-01 | Major | Returned to Compliance |
| 2950 | MCL Measured: 0.1070 MG/L (limit: 0.0800 MG/L) | 2022-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1070 MG/L (limit: 0.0800 MG/L) | 2022-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1070 MG/L (limit: 0.0800 MG/L) | 2022-10-01 | Yes | Acknowledged |
| 7000 | Other | 2022-07-01 | Returned to Compliance | |
| 7000 | Other | 2022-07-01 | Returned to Compliance | |
| 2950 | MCL Measured: 0.1110 MG/L (limit: 0.0800 MG/L) | 2022-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1110 MG/L (limit: 0.0800 MG/L) | 2022-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1110 MG/L (limit: 0.0800 MG/L) | 2022-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1200 MG/L (limit: 0.0800 MG/L) | 2022-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1200 MG/L (limit: 0.0800 MG/L) | 2022-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1200 MG/L (limit: 0.0800 MG/L) | 2022-04-01 | Yes | Acknowledged |
Showing 50 of 129 historical violations.
Understanding This Water System's Record
Harlem City of is a community water system water system that draws from surface water sources and serves a population of 820 in Harlem, 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.