FORT BELKNAP AGENCY WATER SYSTEM
Montana — Community Water System — PWSID: 083090041
System Information
| PWSID | 083090041 |
| System Name | FORT BELKNAP AGENCY WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Native American |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 4, 1980 |
| Last Reported | Mar 2, 2026 |
Location & Contact
| State | Montana |
| City | HARLEM |
| ZIP Code | 59526 |
| Address | 164 Agency Main Street |
| Organization | RAMONE, KASEY |
| Phone | 406-353-8313 |
Population & Service
| Population Served | 2,600 |
| Service Connections | 461 |
Drinking Water Violations (579)
This water system has 579 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2025 | Dec 31, 2025 | MCL | Yes | No | .102 MG/L | 0.080 mg/L | .08 | Archived | Dec 31, 2025 | — | |
| Jul 1, 2025 | Sep 30, 2025 | MCL | Yes | No | .104 MG/L | 0.080 mg/L | .08 | Archived | Sep 30, 2025 | — | |
| Apr 1, 2025 | Jun 30, 2025 | MCL | Yes | No | .101 MG/L | 0.080 mg/L | .08 | Archived | Jun 30, 2025 | — | |
| Apr 1, 2025 | Jun 30, 2025 | TT | Yes | No | .68 RATIO | TT | — | Archived | Jun 30, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | TT | Yes | No | .71 RATIO | TT | — | Archived | Mar 31, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Mar 31, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Mar 31, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | MCL | Yes | No | .109 MG/L | 0.080 mg/L | .08 | Archived | Mar 31, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | MCL | Yes | No | .109 MG/L | 0.080 mg/L | .08 | Archived | Mar 31, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | TT | Yes | No | .71 RATIO | TT | — | Archived | Mar 31, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Mar 31, 2025 | — | |
| Oct 1, 2024 | Dec 31, 2024 | MCL | Yes | No | .115 MG/L | 0.080 mg/L | .08 | Archived | Dec 31, 2024 | — | |
| Oct 1, 2024 | Dec 31, 2024 | TT | Yes | No | .72 RATIO | TT | — | Archived | Dec 31, 2024 | — | |
| Oct 1, 2024 | Dec 31, 2024 | TT | Yes | No | .72 RATIO | TT | — | Archived | Dec 31, 2024 | — | |
| Jul 1, 2024 | Sep 30, 2024 | MCL | Yes | No | .114 MG/L | 0.080 mg/L | .08 | Archived | Sep 30, 2024 | — | |
| Jul 1, 2024 | Sep 30, 2024 | TT | Yes | No | .81 RATIO | TT | — | Archived | Sep 30, 2024 | — | |
| Jul 1, 2024 | Sep 30, 2024 | TT | Yes | No | .81 RATIO | TT | — | Archived | Sep 30, 2024 | — | |
| Jul 1, 2024 | Sep 30, 2024 | TT | Yes | No | .81 RATIO | TT | — | Archived | Sep 30, 2024 | — | |
| Jul 1, 2024 | Sep 30, 2024 | MCL | Yes | No | .114 MG/L | 0.080 mg/L | .08 | Archived | Sep 30, 2024 | — | |
| Apr 1, 2024 | Jun 30, 2024 | TT | Yes | No | .89 RATIO | TT | — | Archived | Jun 30, 2024 | — | |
| Apr 1, 2024 | Jun 30, 2024 | TT | Yes | No | .89 RATIO | TT | 1 | Archived | Jun 30, 2024 | — | |
| Apr 1, 2024 | Jun 30, 2024 | TT | Yes | No | .88 RATIO | TT | — | Archived | Jun 30, 2024 | — | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | .107 MG/L | 0.080 mg/L | .08 | Archived | Jun 30, 2024 | — | |
| Apr 1, 2024 | Jun 30, 2024 | MCL | Yes | No | .107 MG/L | 0.080 mg/L | .08 | Archived | Jun 30, 2024 | — | |
| Jan 1, 2024 | Mar 31, 2024 | TT | Yes | No | .98 RATIO | TT | — | Archived | Mar 31, 2024 | — | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | .095 MG/L | 0.080 mg/L | .08 | Archived | Mar 31, 2024 | — | |
| Jan 1, 2024 | Mar 31, 2024 | MCL | Yes | No | .095 MG/L | 0.080 mg/L | .08 | Archived | Mar 31, 2024 | — | |
| Jan 1, 2024 | Mar 31, 2024 | TT | Yes | No | .89 RATIO | TT | — | Archived | Mar 31, 2024 | — | |
| Jan 1, 2024 | Mar 31, 2024 | TT | Yes | No | .91 RATIO | TT | — | Archived | Mar 31, 2024 | — | |
| Oct 1, 2023 | Dec 31, 2023 | MCL | Yes | No | .085 MG/L | 0.080 mg/L | .08 | Archived | Dec 31, 2023 | — | |
| Jul 1, 2022 | Sep 30, 2022 | MCL | Yes | No | .092 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2022 | — | |
| Jul 1, 2022 | Sep 30, 2022 | MCL | Yes | No | .092 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2022 | — | |
| Apr 1, 2022 | Jun 30, 2022 | MCL | Yes | No | .103 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2022 | — | |
| Apr 1, 2022 | Jun 30, 2022 | MCL | Yes | No | .103 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2022 | — | |
| Apr 1, 2022 | Jun 30, 2022 | MCL | Yes | No | .103 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2022 | — | |
| Apr 1, 2022 | Jun 30, 2022 | MCL | Yes | No | .103 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2022 | — | |
| Oct 1, 2021 | Dec 31, 2021 | MCL | Yes | No | .125 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2021 | — | |
| Oct 1, 2021 | Dec 31, 2021 | MCL | Yes | No | .125 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2021 | — | |
| Oct 1, 2021 | Dec 31, 2021 | TT | Yes | No | .99 RATIO | TT | 1 | Resolved | Dec 31, 2021 | — | |
| Oct 1, 2021 | Dec 31, 2021 | TT | Yes | No | .94 RATIO | TT | 1 | Resolved | Dec 31, 2021 | — | |
| Oct 1, 2021 | Dec 31, 2021 | MCL | Yes | No | .125 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2021 | — | |
| Oct 1, 2021 | Dec 31, 2021 | TT | Yes | No | .99 RATIO | TT | 1 | Resolved | Dec 31, 2021 | — | |
| Oct 1, 2021 | Dec 31, 2021 | TT | Yes | No | .94 RATIO | TT | 1 | Resolved | Dec 31, 2021 | — | |
| Jul 1, 2021 | Sep 30, 2021 | MCL | Yes | No | .13 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2021 | — | |
| Jul 1, 2021 | Sep 30, 2021 | MCL | Yes | No | .13 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2021 | — | |
| Jul 1, 2021 | Sep 30, 2021 | MCL | Yes | No | .13 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MCL | Yes | No | .138 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MCL | Yes | No | .138 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MCL | Yes | No | .127 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | TT | Yes | No | — | TT | — | Resolved | Mar 31, 2021 | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.