MISSION HOUSING WATER SYSTEM
Montana — Community Water System — PWSID: 083090043
System Information
| PWSID | 083090043 |
| System Name | MISSION HOUSING WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Non-Inventory |
| 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 | — |
| Organization | NICHOLSON, MARGARET |
| Phone | 406-353-8313 |
Population & Service
| Population Served | 170 |
| Service Connections | 32 |
Drinking Water Violations (144)
This water system has 144 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 1 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.00005 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.05 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.05 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.0002 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.0002 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.0002 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.0002 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.0004 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.0004 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.7 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.7 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.001 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.7 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.7 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | No | — | 10 mg/L | — | Resolved | Dec 31, 2008 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.0002 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.0002 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | No | — | 1 mg/L | — | Resolved | Dec 31, 2008 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.05 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.05 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | No | — | — | — | Resolved | Dec 31, 2008 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.001 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.003 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.004 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Jan 1, 2010 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Jan 1, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.004 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.003 mg/L | — | Resolved | Dec 31, 2010 | — |
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.