RONAN CITY OF
Montana — Community Water System — PWSID: MT0000318
System Information
| PWSID | MT0000318 |
| System Name | RONAN CITY OF |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1979 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Montana |
| City | RONAN |
| ZIP Code | 59864 |
| Address | 207 MAIN STREET SW |
| Organization | CITY OF RONAN |
| Phone | 406-676-4231 |
Population & Service
| Population Served | 2,483 |
| Service Connections | 1,004 |
Drinking Water Violations (259)
This water system has 259 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2025 | Apr 30, 2025 | MR | No | Yes | — | — | — | Resolved | Apr 30, 2025 | — | |
| Apr 1, 2025 | Apr 30, 2025 | MR | No | Yes | — | — | — | Resolved | Apr 30, 2025 | — | |
| Apr 1, 2025 | Apr 30, 2025 | MR | No | Yes | — | — | — | Resolved | Apr 30, 2025 | — | |
| Mar 1, 2024 | Mar 31, 2024 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2024 | — | |
| Mar 1, 2024 | Mar 31, 2024 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2024 | — | |
| Mar 1, 2024 | Mar 31, 2024 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2024 | — | |
| Dec 1, 2023 | Dec 31, 2023 | MON | No | Yes | — | — | — | Resolved | Dec 31, 2023 | — | |
| Dec 1, 2023 | Dec 31, 2023 | MON | No | Yes | — | — | — | Resolved | Dec 31, 2023 | — | |
| Dec 1, 2023 | Dec 31, 2023 | MON | No | Yes | — | — | — | Resolved | Dec 31, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.075 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.6 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.6 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.7 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.6 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.075 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.075 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.7 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Nov 30, 2023 | — | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Nov 30, 2023 | — |
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.