Commonwealth Utilities Corp (Saipan)
MP — Community Water System — PWSID: MP0000001
System Information
| PWSID | MP0000001 |
| System Name | Commonwealth Utilities Corp (Saipan) |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | State |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | Jan 21, 1981 |
| Last Reported | Dec 19, 2025 |
Location & Contact
| State | MP |
| City | Saipan |
| ZIP Code | 96950 |
| Address | Joeten Dandan Building |
| Organization | Commonwealth Utility Corporation |
| Phone | 6706644282 |
Population & Service
| Population Served | 48,524 |
| Service Connections | 11,317 |
Drinking Water Violations (82)
This water system has 82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nov 1, 2023 | Nov 30, 2023 | Revised Total Coliform Rule | MCL | Yes | No | — | — | — | Resolved | Nov 23, 2023 | Revised Total Coliform Rule |
| Oct 1, 2023 | — | Revised Total Coliform Rule | TT | Yes | No | — | — | — | Resolved | Oct 14, 2023 | Revised Total Coliform Rule |
| Dec 1, 2021 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Apr 19, 2022 | Ground Water Rule |
| Sep 1, 2021 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 11, 2022 | Ground Water Rule |
| Apr 1, 2021 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 11, 2022 | Ground Water Rule |
| Apr 1, 2021 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Dec 17, 2021 | Ground Water Rule |
| Oct 30, 2019 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 11, 2022 | Ground Water Rule |
| Oct 30, 2019 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 11, 2022 | Ground Water Rule |
| Oct 1, 2019 | Oct 31, 2019 | Revised Total Coliform Rule | MCL | Yes | No | — | — | — | Resolved | Oct 31, 2019 | Revised Total Coliform Rule |
| Mar 31, 2019 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 11, 2022 | Ground Water Rule |
| Mar 31, 2019 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 11, 2022 | Ground Water Rule |
| Mar 31, 2019 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 11, 2022 | Ground Water Rule |
| Mar 31, 2019 | — | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | Jan 11, 2022 | Ground Water Rule |
| Mar 1, 2016 | Mar 31, 2016 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Mar 31, 2016 | Total Coliform Rule |
| Sep 1, 2015 | Sep 30, 2015 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2015 | Total Coliform Rule |
| Sep 1, 2014 | Sep 30, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2014 | Total Coliform Rule |
| Jul 1, 2012 | Jul 31, 2012 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2012 | Total Coliform Rule |
| Jul 1, 2012 | Jul 31, 2012 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2012 | Total Coliform Rule |
| Dec 1, 2008 | Dec 31, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Dec 31, 2008 | Total Coliform Rule |
| Oct 1, 2008 | Oct 31, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 2008 | Total Coliform Rule |
| Sep 1, 2008 | Sep 30, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2008 | Total Coliform Rule |
| Sep 1, 2008 | Sep 30, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2008 | Total Coliform Rule |
| Aug 1, 2008 | Aug 31, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2008 | Total Coliform Rule |
| Aug 1, 2008 | Aug 31, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2008 | Total Coliform Rule |
| Aug 1, 2008 | Aug 31, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2008 | Total Coliform Rule |
| Aug 1, 2008 | Aug 31, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2008 | Total Coliform Rule |
| Jul 1, 2008 | Jul 31, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 15, 2008 | Total Coliform Rule |
| Jun 1, 2008 | Jun 30, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2008 | Total Coliform Rule |
| Mar 1, 2008 | Mar 31, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Mar 10, 2008 | Total Coliform Rule |
| Mar 1, 2008 | Mar 31, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Mar 10, 2008 | Total Coliform Rule |
| Feb 1, 2008 | Feb 29, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 12, 2008 | Total Coliform Rule |
| Feb 1, 2008 | Feb 29, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Feb 29, 2008 | Total Coliform Rule |
| Feb 1, 2008 | Feb 29, 2008 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Feb 29, 2008 | Total Coliform Rule |
| Nov 1, 2007 | Nov 30, 2007 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Nov 27, 2007 | Total Coliform Rule |
| Oct 1, 2007 | Oct 31, 2007 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 30, 2007 | Total Coliform Rule |
| Oct 1, 2007 | Oct 31, 2007 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Oct 31, 2007 | Total Coliform Rule |
| Aug 1, 2007 | Aug 31, 2007 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2007 | Total Coliform Rule |
| Jun 1, 2007 | Jun 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Jun 30, 2007 | Total Coliform Rule |
| Jun 1, 2007 | Jun 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Jun 30, 2007 | Total Coliform Rule |
| Jun 1, 2007 | Jun 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Jun 30, 2007 | Total Coliform Rule |
| Jun 1, 2007 | Jun 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Jun 30, 2007 | Total Coliform Rule |
| Apr 1, 2007 | Apr 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2007 | Total Coliform Rule |
| Apr 1, 2007 | Apr 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2007 | Total Coliform Rule |
| Apr 1, 2007 | Apr 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2007 | Total Coliform Rule |
| Apr 1, 2007 | Apr 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2007 | Total Coliform Rule |
| Mar 1, 2007 | Mar 31, 2007 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Mar 31, 2007 | Total Coliform Rule |
| Feb 1, 2007 | Feb 28, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2007 | Total Coliform Rule |
| May 1, 2005 | May 31, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2005 | Total Coliform Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | May 3, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | May 3, 2005 | Lead and Copper Rule |
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.