YOSEMITE NPS-EL PORTAL
California - Community Water System - PWSID: CA2210515
System Information
| PWSID | CA2210515 |
| System Name | YOSEMITE NPS-EL PORTAL |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Federal |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 22, 1979 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | California |
| City | YOSEMITE NP |
| ZIP Code | 95389 |
| Address | P.O. BOX 577 |
| Organization | TRUMM, MICHAEL |
| Phone | 209-379-1055 |
Population & Service
| Population Served | 635 |
| Service Connections | 226 |
Drinking Water Violations (17)
This water system has 17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2007 | - | Other | No | No | - | - | - | Resolved | Nov 9, 2007 | - | |
| Jul 1, 2007 | - | Other | No | No | - | - | - | Resolved | Nov 9, 2007 | - | |
| Jul 2, 2005 | - | MR | No | No | - | TT | - | Resolved | Dec 28, 2005 | - | |
| Jul 2, 2005 | - | MR | No | No | - | TT | - | Resolved | Dec 28, 2005 | - | |
| Jul 1, 2005 | - | Other | No | No | - | - | - | Resolved | Nov 14, 2006 | - | |
| Jul 1, 2005 | - | Other | No | No | - | - | - | Resolved | Nov 14, 2006 | - | |
| Jan 2, 2005 | - | MR | No | No | - | TT | - | Resolved | Dec 28, 2005 | - | |
| Jan 2, 2005 | - | MR | No | No | - | TT | - | Resolved | Dec 28, 2005 | - | |
| Jul 2, 2004 | - | MR | No | No | - | TT | - | Resolved | Dec 28, 2005 | - | |
| Jul 2, 2004 | - | MR | No | No | - | TT | - | Resolved | Dec 28, 2005 | - | |
| Jan 2, 2004 | - | MR | No | No | - | TT | - | Resolved | Dec 28, 2005 | - | |
| Jan 2, 2004 | - | MR | No | No | - | TT | - | Resolved | Dec 28, 2005 | - | |
| Feb 1, 1994 | Feb 28, 1994 | MCL | Yes | No | - | 5% of samples | - | Resolved | Feb 28, 1994 | - | |
| Feb 1, 1994 | Feb 28, 1994 | MCL | Yes | No | - | 5% of samples | - | Resolved | Feb 28, 1994 | - | |
| Jul 1, 1992 | Jul 31, 1992 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 1992 | - | |
| Jul 1, 1992 | Jul 31, 1992 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 1992 | - | |
| Sep 30, 1980 | Oct 29, 1980 | Other | No | No | - | - | - | Archived | Oct 29, 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.