COCOS ISLAND WATER SYSTEM
GU — Non-Transient Non-Community — PWSID: GU0000011
System Information
| PWSID | GU0000011 |
| System Name | COCOS ISLAND WATER SYSTEM |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Non-Inventory |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 23, 1997 |
| Last Reported | Mar 30, 2026 |
Location & Contact
| State | GU |
| City | TAMUNING |
| ZIP Code | 96915 |
| Address | P.O. BOX 7174 |
| Organization | QUINATA, MASAE |
| Phone | 671-828-1712 |
Population & Service
| Population Served | 1 |
| Service Connections | 1 |
Drinking Water Violations (21)
This water system has 21 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, 2021 | Jul 31, 2021 | MON | No | Yes | — | — | — | Archived | Jul 31, 2021 | — | |
| Jun 1, 2021 | Jun 30, 2021 | MON | No | Yes | — | — | — | Archived | Jun 30, 2021 | — | |
| May 1, 2021 | May 31, 2021 | MON | No | Yes | — | — | — | Archived | May 31, 2021 | — | |
| Apr 1, 2021 | Apr 30, 2021 | MON | No | Yes | — | — | — | Archived | Apr 30, 2021 | — | |
| Mar 1, 2021 | Mar 31, 2021 | MON | No | Yes | — | — | — | Archived | Mar 31, 2021 | — | |
| Feb 1, 2021 | Feb 28, 2021 | MON | No | Yes | — | — | — | Archived | Feb 28, 2021 | — | |
| Jan 1, 2021 | Jan 31, 2021 | MON | No | Yes | — | — | — | Archived | Jan 31, 2021 | — | |
| Dec 1, 2020 | Dec 31, 2020 | MON | No | Yes | — | — | — | Archived | Dec 31, 2020 | — | |
| Nov 1, 2020 | Nov 30, 2020 | MON | No | Yes | — | — | — | Archived | Nov 30, 2020 | — | |
| Oct 1, 2020 | Oct 31, 2020 | MON | No | Yes | — | — | — | Archived | Oct 31, 2020 | — | |
| Sep 1, 2020 | Sep 30, 2020 | MON | No | Yes | — | — | — | Archived | Sep 30, 2020 | — | |
| Aug 1, 2020 | Aug 31, 2020 | MON | No | Yes | — | — | — | Archived | Aug 31, 2020 | — | |
| Jul 1, 2020 | Jul 31, 2020 | MON | No | Yes | — | — | — | Archived | Jul 31, 2020 | — | |
| Jun 1, 2020 | Jun 30, 2020 | MON | No | Yes | — | — | — | Archived | Jun 30, 2020 | — | |
| May 1, 2020 | May 31, 2020 | MON | No | Yes | — | — | — | Archived | May 31, 2020 | — | |
| Apr 1, 2020 | Apr 30, 2020 | MON | No | Yes | — | — | — | Archived | Apr 30, 2020 | — | |
| Feb 1, 2018 | — | TT | Yes | No | — | — | — | Resolved | Apr 10, 2018 | — | |
| Feb 1, 2013 | Feb 28, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2013 | — | |
| Feb 1, 2013 | Feb 28, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2013 | — | |
| Feb 1, 2013 | Feb 28, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2013 | — | |
| — | — | — | 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.