CHINOOK CITY OF
Montana — Community Water System — PWSID: MT0000174
System Information
| PWSID | MT0000174 |
| System Name | CHINOOK 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 | CHINOOK |
| ZIP Code | 59532 |
| Address | PO BOX 1177 |
| Organization | DUNKIN, RHIANNON |
| Phone | 406-357-3160 |
Population & Service
| Population Served | 1,300 |
| Service Connections | 807 |
Drinking Water Violations (53)
This water system has 53 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 | .073 MG/L | 0.060 mg/L | .06 | Resolved | Dec 11, 2025 | — | |
| Oct 1, 2025 | Dec 31, 2025 | MCL | Yes | No | .073 MG/L | 0.060 mg/L | .06 | Resolved | Dec 11, 2025 | — | |
| Oct 1, 2025 | Dec 31, 2025 | MCL | Yes | No | .073 MG/L | 0.060 mg/L | .06 | Resolved | Dec 11, 2025 | — | |
| Jul 1, 2025 | Sep 30, 2025 | MCL | Yes | No | .077 MG/L | 0.060 mg/L | .06 | Resolved | Sep 16, 2025 | — | |
| Jul 1, 2025 | Sep 30, 2025 | MCL | Yes | No | .077 MG/L | 0.060 mg/L | .06 | Resolved | Sep 16, 2025 | — | |
| Jul 1, 2025 | Sep 30, 2025 | MCL | Yes | No | .077 MG/L | 0.060 mg/L | .06 | Resolved | Sep 16, 2025 | — | |
| Apr 1, 2025 | Jun 30, 2025 | MCL | Yes | No | .079 MG/L | 0.060 mg/L | .06 | Resolved | Jun 3, 2025 | — | |
| Apr 1, 2025 | Jun 30, 2025 | MCL | Yes | No | .079 MG/L | 0.060 mg/L | .06 | Resolved | Jun 3, 2025 | — | |
| Apr 1, 2025 | Jun 30, 2025 | MCL | Yes | No | .079 MG/L | 0.060 mg/L | .06 | Resolved | Jun 3, 2025 | — | |
| Apr 1, 2025 | Jun 30, 2025 | MCL | Yes | No | .079 MG/L | 0.060 mg/L | .06 | Resolved | Jun 3, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | MCL | Yes | No | .071 MG/L | 0.060 mg/L | .06 | Resolved | Mar 28, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | MCL | Yes | No | .071 MG/L | 0.060 mg/L | .06 | Resolved | Mar 28, 2025 | — | |
| Jan 1, 2025 | Mar 31, 2025 | MCL | Yes | No | .071 MG/L | 0.060 mg/L | .06 | Resolved | Mar 28, 2025 | — | |
| Oct 1, 2014 | Oct 31, 2014 | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2014 | — | |
| Oct 1, 2014 | Oct 31, 2014 | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2014 | — | |
| Oct 1, 2014 | Oct 31, 2014 | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2014 | — | |
| Apr 1, 2011 | Jun 30, 2011 | MCL | Yes | No | 62.3 UG/L | 0.060 mg/L | 60 | Resolved | Jun 30, 2011 | — | |
| Apr 1, 2011 | Jun 30, 2011 | MCL | Yes | No | 62.3 UG/L | 0.060 mg/L | 60 | Resolved | Jun 30, 2011 | — | |
| Apr 1, 2011 | Jun 30, 2011 | MCL | Yes | No | 62.3 UG/L | 0.060 mg/L | 60 | Resolved | Jun 30, 2011 | — | |
| Apr 1, 2011 | Jun 30, 2011 | MCL | Yes | No | 62.3 UG/L | 0.060 mg/L | 60 | Resolved | Jun 30, 2011 | — | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2004 | — | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2004 | — | |
| Jan 1, 2004 | Dec 31, 2004 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2004 | — | |
| Jan 1, 2003 | Dec 31, 2003 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2003 | — | |
| Jan 1, 2003 | Dec 31, 2003 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2003 | — | |
| Jan 1, 2003 | Dec 31, 2003 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2003 | — | |
| Jan 1, 2002 | Dec 31, 2002 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2002 | — | |
| Jan 1, 2002 | Dec 31, 2002 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2002 | — | |
| Jan 1, 2002 | Dec 31, 2002 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2002 | — | |
| Jan 1, 2000 | Dec 31, 2000 | MCL | Yes | No | .01 MG/L | 0.005 mg/L | .005 | Resolved | Dec 31, 2000 | — | |
| Jan 1, 1999 | Jan 31, 1999 | TT | Yes | No | — | — | — | Resolved | Jan 31, 1999 | — | |
| Jan 1, 1999 | Jan 31, 1999 | TT | Yes | No | — | — | — | Resolved | Jan 31, 1999 | — | |
| Nov 1, 1997 | Nov 30, 1997 | TT | Yes | No | — | — | — | Resolved | Nov 30, 1997 | — | |
| Nov 1, 1997 | Nov 30, 1997 | TT | Yes | No | — | — | — | Resolved | Nov 30, 1997 | — | |
| Oct 1, 1997 | Oct 31, 1997 | TT | Yes | No | — | — | — | Resolved | Oct 31, 1997 | — | |
| Oct 1, 1997 | Oct 31, 1997 | TT | Yes | No | — | — | — | Resolved | Oct 31, 1997 | — | |
| Sep 1, 1997 | Sep 30, 1997 | TT | Yes | No | — | — | — | Resolved | Sep 30, 1997 | — | |
| Sep 1, 1997 | Sep 30, 1997 | TT | Yes | No | — | — | — | Resolved | Sep 30, 1997 | — | |
| Aug 1, 1997 | Aug 31, 1997 | TT | Yes | No | — | — | — | Resolved | Aug 31, 1997 | — | |
| Aug 1, 1997 | Aug 31, 1997 | TT | Yes | No | — | — | — | Resolved | Aug 31, 1997 | — | |
| Jun 1, 1995 | Jun 30, 1995 | TT | Yes | No | — | — | — | Resolved | Jun 30, 1995 | — | |
| May 1, 1995 | May 31, 1995 | TT | Yes | No | — | — | — | Resolved | May 31, 1995 | — | |
| Apr 1, 1995 | Apr 30, 1995 | TT | Yes | No | — | — | — | Resolved | Apr 30, 1995 | — | |
| Feb 1, 1995 | Feb 28, 1995 | TT | Yes | No | — | — | — | Resolved | Feb 28, 1995 | — | |
| May 1, 1994 | May 31, 1994 | MR | No | No | — | 5% of samples | — | Resolved | May 31, 1994 | — | |
| Jan 1, 1994 | Jan 31, 1994 | MR | No | No | — | 5% of samples | — | Resolved | Jan 31, 1994 | — | |
| Jan 1, 1994 | Jan 31, 1994 | MR | No | No | — | 5% of samples | — | Resolved | Jan 31, 1994 | — | |
| Jan 1, 1994 | Dec 31, 1994 | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Dec 31, 1994 | — | |
| Jan 1, 1994 | Dec 31, 1994 | MR | No | Yes | — | — | — | Resolved | Dec 31, 1994 | — | |
| Jan 1, 1994 | Dec 31, 1994 | MR | No | Yes | — | 0.006 mg/L | — | Resolved | Dec 31, 1994 | — |
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.