Shelton, WA · Mason County
HAMMA RIDGE Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Washington’s official records. Always confirm current status with Washington before making decisions based on this information.
System facts
- System ID (PWSID)
- WA5305867
- System type
- Community Water System
- Population served
- 63
- Service connections
- 28
- Ownership
- local government
- Water source
- groundwater (wells)
Violation history
Monitoring, Routine (RTCR)
—Revised Total Coliform Rule
April 1, 2025 – April 30, 2025
ResolvedMonitoring, Regular
—Diquat
October 1, 2007 – December 31, 2007
ResolvedMonitoring, Regular
—Diquat
July 1, 2007 – September 30, 2007
ResolvedMonitoring, Regular
—Diquat
April 1, 2007 – June 30, 2007
ResolvedMonitoring, Regular
—Diquat
January 1, 2007 – March 31, 2007
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| April 1, 2025 – April 30, 2025 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| October 1, 2007 – December 31, 2007 | Monitoring, Regular | Diquat | — | Resolved |
| July 1, 2007 – September 30, 2007 | Monitoring, Regular | Diquat | — | Resolved |
| April 1, 2007 – June 30, 2007 | Monitoring, Regular | Diquat | — | Resolved |
| January 1, 2007 – March 31, 2007 | Monitoring, Regular | Diquat | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- December 23, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- May 7, 2025State Compliance achieved1 linked violation
Contact
HAMMA RIDGE
Phone not on record
Shelton, WA 98584