Shelton, WA · Mason County
HAMMA RIDGE Water System
Consumer Confidence Report status
HAMMA RIDGE must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for HAMMA RIDGE.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)
HAMMA RIDGE is one of 3,227 community water systems in Washington in the 500 or fewer people size category, serving 63 people from groundwater.
As of August 1, 2026, its federal record holds 5 entries between 2007 and 2025, all of which EPA lists as closed.
All 5 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves synthetic organic chemicals and the Total Coliform Rules.
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
Common questions
Is HAMMA RIDGE required to publish a Consumer Confidence Report?
- Yes. HAMMA RIDGE is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is HAMMA RIDGE’s next Consumer Confidence Report due?
- HAMMA RIDGE’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does HAMMA RIDGE have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for HAMMA RIDGE.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
HAMMA RIDGE
Phone not on record
Shelton, WA 98584