LOWER GRANITE LOCK & DAM
Washington - Non-Transient Non-Community - PWSID: WA5348705
System Information
| PWSID | WA5348705 |
| System Name | LOWER GRANITE LOCK & DAM |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| 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 | Pomeroy |
| ZIP Code | 99347 |
| Address | 885 Almota Ferry RD |
| Organization | LOWER GRANITE LOCK & DAM |
| Phone | - |
Population & Service
| Population Served | 120 |
| Service Connections | 3 |
Drinking Water Violations (41)
This water system has 41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb 1, 2016 | Feb 29, 2016 | MR | No | No | - | 5% of samples | - | Resolved | Feb 29, 2016 | - | |
| Feb 1, 2015 | Feb 28, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2015 | - | |
| Jan 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Jan 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.001 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.05 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.5 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.02 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.04 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.0002 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.007 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.002 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.0002 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.004 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.4 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.001 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | - | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.0002 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.001 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.00005 mg/L | - | Resolved | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | - | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.2 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.0004 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.05 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.04 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.002 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.003 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.006 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.2 mg/L | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | - | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | - | - | Archived | Sep 30, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 0.003 mg/L | - | Archived | Sep 30, 2006 | - | |
| Oct 1, 2005 | Oct 31, 2005 | MR | No | No | - | 5% of samples | - | Archived | Oct 31, 2005 | - | |
| Jul 1, 2004 | Jul 31, 2004 | MCL | Yes | No | - | 5% of samples | - | Archived | Jul 31, 2004 | - | |
| Apr 1, 2004 | Apr 30, 2004 | MR | No | No | - | 5% of samples | - | Archived | Apr 30, 2004 | - | |
| Dec 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | Dec 31, 1999 | - | |
| Nov 1, 1999 | Nov 30, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | Nov 30, 1999 | - | |
| Apr 1, 1998 | Jan 1, 1999 | MR | No | No | - | TT | - | Resolved | Jan 1, 1999 | - | |
| Dec 1, 1992 | Dec 31, 1992 | MR | No | Yes | - | 5% of samples | - | Archived | Dec 31, 1992 | - | |
| - | - | - | 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.