Coupeville, WA · Island County
THUNDER RIDGE WATER SYSTEM Water System
Consumer Confidence Report status
THUNDER RIDGE WATER SYSTEM 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 THUNDER RIDGE WATER SYSTEM.
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)
- WA5388200
- System type
- Community Water System
- Population served
- 145
- Service connections
- 143
- Ownership
- privately owned
- Water source
- groundwater (wells)
THUNDER RIDGE WATER SYSTEM is one of 3,227 community water systems in Washington in the 500 or fewer people size category, serving 145 people from groundwater.
As of August 1, 2026, its federal record holds 13 entries between 1979 and 2022, all of which EPA lists as closed. Nothing has been added since 2022.
Of the 13, 12 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 inorganic chemicals, the Lead and Copper Rule, and the Total Coliform Rules.
Violation history
Monitoring, Regular
—Nitrate
January 1, 2022 – December 31, 2022
ResolvedMonitoring, Regular
—Arsenic
January 1, 2020 – December 31, 2022
ResolvedFollow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
January 1, 2019 – September 30, 2022
ResolvedMaximum Contaminant Level Violation, Acute (TCR)
Health-basedColiform (TCR)
October 1, 2011 – October 31, 2011
ResolvedMonitoring, Regular
—Cadmium
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Chromium
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Fluoride
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Mercury
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Nitrate
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Selenium
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Arsenic
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Barium
October 1, 1979 – October 31, 1979
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2022 – December 31, 2022 | Monitoring, Regular | Nitrate | — | Resolved |
| January 1, 2020 – December 31, 2022 | Monitoring, Regular | Arsenic | — | Resolved |
| January 1, 2019 – September 30, 2022 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Resolved |
| October 1, 2011 – October 31, 2011 | Maximum Contaminant Level Violation, Acute (TCR) | Coliform (TCR) | Health-based | Resolved |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Cadmium | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Chromium | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Fluoride | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Mercury | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Nitrate | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Selenium | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Arsenic | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Barium | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- May 28, 2024State Compliance achieved1 linked violation
- July 26, 2023State Compliance achieved1 linked violation
- September 30, 2022State Compliance achieved1 linked violation
- November 30, 2011State Compliance achieved1 linked violation
Common questions
Is THUNDER RIDGE WATER SYSTEM required to publish a Consumer Confidence Report?
- Yes. THUNDER RIDGE WATER SYSTEM 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 THUNDER RIDGE WATER SYSTEM’s next Consumer Confidence Report due?
- THUNDER RIDGE WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does THUNDER RIDGE WATER SYSTEM have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for THUNDER RIDGE WATER SYSTEM.
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
THUNDER RIDGE WATER SYSTEM
Phone not on record
Coupeville, WA 98239