Winthrop KOA
Montana — Transient Non-Community — PWSID: WA5397744
System Information
| PWSID | WA5397744 |
| System Name | Winthrop KOA |
| System Type | Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 7, 1981 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Montana |
| City | Billings |
| ZIP Code | 59107 |
| Address | PO Box 30558 |
| Organization | Winthrop KOA |
| Phone | — |
Population & Service
| Population Served | 77 |
| Service Connections | 79 |
Drinking Water Violations (14)
This water system has 14 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec 1, 2025 | Dec 31, 2025 | MON | No | Yes | — | — | — | Archived | Dec 31, 2025 | — | |
| Jun 1, 2025 | Jun 30, 2025 | MON | No | Yes | — | — | — | Resolved | Jun 30, 2025 | — | |
| Jan 1, 2025 | Dec 31, 2025 | MR | No | Yes | — | 10 mg/L | — | Archived | Dec 31, 2025 | — | |
| Apr 1, 2013 | Apr 30, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2013 | — | |
| Sep 1, 2006 | Sep 30, 2006 | MR | No | No | — | 5% of samples | — | Archived | Sep 30, 2006 | — | |
| Sep 1, 2004 | Sep 30, 2004 | MR | No | No | — | 5% of samples | — | Archived | Sep 30, 2004 | — | |
| Aug 1, 2000 | Aug 31, 2000 | MR | No | Yes | — | 5% of samples | — | Archived | Aug 31, 2000 | — | |
| Apr 1, 2000 | Apr 30, 2000 | MR | No | Yes | — | 5% of samples | — | Archived | Apr 30, 2000 | — | |
| Jun 1, 1999 | Jun 30, 1999 | MR | No | Yes | — | 5% of samples | — | Archived | Jun 30, 1999 | — | |
| Apr 1, 1999 | Apr 30, 1999 | MR | No | Yes | — | 5% of samples | — | Archived | Apr 30, 1999 | — | |
| Jul 1, 1997 | Jul 31, 1997 | MR | No | Yes | — | 5% of samples | — | Archived | Jul 31, 1997 | — | |
| Aug 1, 1992 | Aug 31, 1992 | MR | No | Yes | — | 5% of samples | — | Archived | Aug 31, 1992 | — | |
| Jul 1, 1992 | Jul 31, 1992 | MR | No | Yes | — | 5% of samples | — | Archived | Jul 31, 1992 | — | |
| May 1, 1992 | May 31, 1992 | MR | No | Yes | — | 5% of samples | — | Archived | May 31, 1992 | — |
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.