GRAND COULEE DAM
Washington - Non-Transient Non-Community - PWSID: WA5328695
System Information
| PWSID | WA5328695 |
| System Name | GRAND COULEE DAM |
| System Type | Non-Transient Non-Community |
| Water Source | Surface Water |
| Activity Status | Inactive |
| Owner Type | Federal |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 7, 1981 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Washington |
| City | Grand Coulee |
| ZIP Code | 99133 |
| Address | PO Box 620 |
| Organization | GRAND COULEE DAM |
| Phone | - |
Population & Service
| Population Served | 25 |
| Service Connections | - |
Drinking Water Violations (154)
This water system has 154 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2006 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | 0.04 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | 0.04 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | 0.04 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | 0.04 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | 0.04 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Jan 1, 2005 | Jun 30, 2007 | MR | No | Yes | - | - | - | Resolved | Jun 30, 2007 | - | |
| Nov 1, 2000 | Nov 30, 2000 | TT | Yes | No | - | - | - | Archived | Nov 30, 2000 | - | |
| Oct 1, 2000 | Oct 31, 2000 | MR | No | Yes | - | - | - | Archived | Oct 31, 2000 | - | |
| Sep 1, 2000 | Sep 30, 2000 | TT | Yes | No | - | - | - | Archived | Sep 30, 2000 | - | |
| Aug 1, 2000 | Aug 31, 2000 | TT | Yes | No | - | - | - | Archived | Aug 31, 2000 | - | |
| Jul 1, 2000 | Jul 31, 2000 | TT | Yes | No | - | - | - | Archived | Jul 31, 2000 | - | |
| Jun 1, 2000 | Jun 30, 2000 | TT | Yes | No | - | - | - | Archived | Jun 30, 2000 | - | |
| May 1, 2000 | May 31, 2000 | TT | Yes | No | - | - | - | Archived | May 31, 2000 | - | |
| Apr 1, 2000 | Apr 30, 2000 | TT | Yes | No | - | - | - | Archived | Apr 30, 2000 | - | |
| Mar 1, 2000 | Mar 31, 2000 | TT | Yes | No | - | - | - | Archived | Mar 31, 2000 | - | |
| Feb 1, 2000 | Feb 29, 2000 | TT | Yes | No | - | - | - | Archived | Feb 29, 2000 | - | |
| Jan 1, 2000 | Jan 31, 2000 | TT | Yes | No | - | - | - | Archived | Jan 31, 2000 | - | |
| Dec 1, 1999 | Dec 31, 1999 | TT | Yes | No | - | - | - | Archived | Dec 31, 1999 | - | |
| Nov 1, 1999 | Nov 30, 1999 | TT | Yes | No | - | - | - | Archived | Nov 30, 1999 | - | |
| Oct 1, 1999 | Oct 31, 1999 | TT | Yes | No | - | - | - | Archived | Oct 31, 1999 | - | |
| Sep 1, 1999 | Oct 1, 1999 | TT | Yes | No | - | - | - | Archived | Oct 1, 1999 | - | |
| Aug 1, 1999 | Sep 1, 1999 | TT | Yes | No | - | - | - | Archived | Sep 1, 1999 | - | |
| Jul 1, 1999 | Aug 1, 1999 | TT | Yes | No | - | - | - | Archived | Aug 1, 1999 | - |
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.