GRAHAM HILL MUTUAL WATER CO INC
Washington — Community Water System — PWSID: WA5328650
System Information
| PWSID | WA5328650 |
| System Name | GRAHAM HILL MUTUAL WATER CO INC |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 7, 1981 |
| Last Reported | Dec 11, 2025 |
Location & Contact
| State | Washington |
| City | GRAHAM |
| ZIP Code | 98338-7190 |
| Address | 9922 249th St E |
| Organization | GRAHAM HILL MUTUAL WATER CO INC |
| Phone | — |
Population & Service
| Population Served | 1,474 |
| Service Connections | 448 |
Drinking Water Violations (18)
This water system has 18 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, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 29, 2023 | Consumer Confidence Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Jan 1, 2008 | Dec 31, 2010 | Aldicarb sulfone | MR | No | Yes | — | — | — | Archived | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Carbofuran | MR | No | Yes | — | 0.04 mg/L | — | Archived | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Carbofuran | MR | No | Yes | — | 0.04 mg/L | — | Archived | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | OXAMYL | MR | No | Yes | — | 0.2 mg/L | — | Archived | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Aldicarb | MR | No | Yes | — | — | — | Archived | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Aldicarb sulfone | MR | No | Yes | — | — | — | Archived | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Aldicarb | MR | No | Yes | — | — | — | Archived | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Aldicarb sulfoxide | MR | No | Yes | — | — | — | Archived | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | Aldicarb sulfoxide | MR | No | Yes | — | — | — | Archived | Dec 31, 2010 | Synthetic Organic Chemicals |
| Jan 1, 2008 | Dec 31, 2010 | OXAMYL | MR | No | Yes | — | 0.2 mg/L | — | Archived | Dec 31, 2010 | Synthetic Organic Chemicals |
| Oct 1, 2004 | Oct 31, 2004 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Oct 31, 2004 | Total Coliform Rule |
| Sep 1, 2004 | Sep 30, 2004 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Sep 30, 2004 | Total Coliform Rule |
| Sep 1, 1994 | Sep 30, 1994 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Sep 30, 1994 | Total Coliform Rule |
| Aug 1, 1994 | Aug 31, 1994 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Aug 31, 1994 | Total Coliform Rule |
| Nov 1, 1992 | Nov 30, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Nov 30, 1992 | Total Coliform Rule |
| Oct 1, 1979 | Oct 31, 1979 | Gross Alpha, Excl. Radon and U | MR | No | No | — | 15 pCi/L | — | Archived | Oct 31, 1979 | Radionuclides and Revised Rad 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.