GRAND MOUND
Washington — Community Water System — PWSID: WA5307158
System Information
| PWSID | WA5307158 |
| System Name | GRAND MOUND |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Nov 23, 1999 |
| Last Reported | Dec 11, 2025 |
Location & Contact
| State | Washington |
| City | Olympia |
| ZIP Code | 98512 |
| Address | 9605 Tilley Rd. South |
| Organization | GRAND MOUND |
| Phone | — |
Population & Service
| Population Served | 3,764 |
| Service Connections | 426 |
Drinking Water Violations (4)
This water system has 4 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, 2018 | Feb 28, 2018 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Feb 28, 2018 | Revised Total Coliform Rule |
| Jul 1, 2016 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 29, 2016 | Consumer Confidence Rule |
| Jul 1, 2015 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Aug 28, 2015 | Consumer Confidence Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2009 | Nitrate 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.