YNP-MAMMOTH HOT SPRINGS
Wyoming - Community Water System - PWSID: WY5680092
System Information
| PWSID | WY5680092 |
| System Name | YNP-MAMMOTH HOT SPRINGS |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Federal |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 2, 1981 |
| Last Reported | Mar 2, 2026 |
Location & Contact
| State | Wyoming |
| City | YELLOWSTONE NATIONAL PARK |
| ZIP Code | 82190 |
| Address | P.O. Box 168 |
| Organization | JIMENO, MICHAEL |
| Phone | 307-344-2535 |
Population & Service
| Population Served | 2,600 |
| Service Connections | 274 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 1, 2023 | Aug 31, 2023 | MR | No | No | - | - | - | Resolved | Aug 31, 2023 | - | |
| Aug 1, 2023 | Aug 31, 2023 | MR | No | No | - | - | - | Resolved | Aug 31, 2023 | - | |
| Jun 1, 2017 | May 31, 2018 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | May 31, 2018 | - | |
| Jun 1, 2017 | May 31, 2018 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | May 31, 2018 | - | |
| Sep 1, 2013 | Sep 30, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2013 | - | |
| Sep 1, 2013 | Sep 30, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2013 | - | |
| Jul 1, 2005 | Jul 31, 2005 | TT | Yes | No | - | - | - | Resolved | Jul 31, 2005 | - | |
| Jul 1, 2005 | Jul 31, 2005 | TT | Yes | No | - | - | - | Resolved | Jul 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | TT | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | TT | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | TT | - | Resolved | Mar 31, 2005 | - | |
| Oct 1, 1993 | Dec 31, 1993 | MR | No | Yes | - | 10 mg/L | - | Archived | Dec 31, 1993 | - | |
| Jun 24, 1980 | Jul 23, 1980 | MR | No | No | - | 15 pCi/L | - | Archived | Jul 23, 1980 | - | |
| Jun 24, 1980 | Jul 23, 1980 | MR | No | No | - | 5 pCi/L | - | Archived | Jul 23, 1980 | - |
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.