GUERNSEY LAKE MOBILE HOME COMMUNITY
Montana - Community Water System - PWSID: MI0040046
System Information
| PWSID | MI0040046 |
| System Name | GUERNSEY LAKE MOBILE HOME COMMUNITY |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 3, 1981 |
| Last Reported | Jun 23, 2026 |
Location & Contact
| State | Montana |
| City | STEVENSVILLE |
| ZIP Code | 59870 |
| Address | 2875 Eastside Hwy. |
| Organization | GANNETT, JOE |
| Phone | 847-502-3966 |
Population & Service
| Population Served | 100 |
| Service Connections | 40 |
Drinking Water Violations (140)
This water system has 140 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nov 14, 2025 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Sep 1, 2025 | Sep 30, 2025 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2025 | - | |
| Sep 1, 2025 | Sep 30, 2025 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2025 | - | |
| Sep 1, 2025 | Sep 30, 2025 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2025 | - | |
| Sep 1, 2025 | Sep 30, 2025 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2025 | - | |
| Nov 11, 2024 | - | RPT | No | No | - | - | - | Resolved | Dec 4, 2024 | - | |
| Nov 11, 2024 | - | RPT | No | No | - | - | - | Resolved | Dec 4, 2024 | - | |
| Nov 11, 2024 | - | RPT | No | No | - | - | - | Resolved | Dec 4, 2024 | - | |
| Nov 11, 2024 | - | RPT | No | No | - | - | - | Resolved | Dec 4, 2024 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Sep 22, 2025 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Sep 22, 2025 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Sep 22, 2025 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Aug 15, 2024 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Aug 15, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.4 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.4 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.006 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.006 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | - | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | - | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.04 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.04 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | - | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | - | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.0004 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.0004 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.001 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.001 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.0005 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.0005 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | - | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.003 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.003 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.001 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jan 1, 2022 | Sep 30, 2024 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Sep 30, 2024 | - |
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.