HAPPY HARBOR (SWS)
California - Community Water System - PWSID: CA3400128
System Information
| PWSID | CA3400128 |
| System Name | HAPPY HARBOR (SWS) |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 22, 1979 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | California |
| City | ISLETON |
| ZIP Code | 95641 |
| Address | 731 W BRANNAN ISLAND RD SP 20 |
| Organization | KHOA, MICHAEL |
| Phone | 650-533-5221 |
Population & Service
| Population Served | 60 |
| Service Connections | 45 |
Drinking Water Violations (27)
This water system has 27 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, 2023 | Oct 31, 2023 | MON | No | No | - | - | - | Resolved | Oct 31, 2023 | - | |
| Oct 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Jul 30, 2025 | - | |
| Oct 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Jul 30, 2025 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jul 1, 2014 | - | Other | No | No | - | - | - | Resolved | Nov 6, 2015 | - | |
| Jul 1, 2014 | - | Other | No | No | - | - | - | Resolved | Nov 6, 2015 | - | |
| Jul 1, 2014 | Sep 30, 2014 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Sep 30, 2014 | - | |
| Jun 1, 2014 | Jun 30, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2014 | - | |
| Jun 1, 2014 | Jun 30, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2014 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Feb 24, 2014 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Feb 24, 2014 | - | |
| Jul 1, 2012 | - | Other | No | No | - | - | - | Resolved | Feb 24, 2014 | - | |
| Jul 1, 2012 | - | Other | No | No | - | - | - | Resolved | Feb 24, 2014 | - | |
| Jun 1, 2010 | Jun 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2010 | - | |
| Jun 1, 2010 | Jun 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2010 | - | |
| May 1, 2010 | May 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 2010 | - | |
| May 1, 2010 | May 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 2010 | - | |
| Apr 1, 2010 | Apr 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2010 | - | |
| Apr 1, 2010 | Apr 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2010 | - | |
| Oct 1, 2002 | Oct 31, 2002 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2002 | - | |
| Oct 1, 2002 | Oct 31, 2002 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2002 | - | |
| Mar 1, 2000 | Mar 31, 2000 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2000 | - | |
| Mar 1, 2000 | Mar 31, 2000 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2000 | - | |
| Jul 1, 1999 | Jul 31, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 1999 | - | |
| Jul 1, 1999 | Jul 31, 1999 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 1999 | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - |
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.