Sequim Water Quality
Washington
According to EPA SDWIS, Sequim, Washington is served by 40 community water systems covering about 26,670 people. The same extract lists 3 health-based violation records, most recently coded 5000 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Sequim, Washington is delivered through 40 EPA-regulated community water systems serving an estimated 26,670 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 3 violation records across the 40 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 3 distinct EPA contaminant codes: Lead and Copper Rule, Revised Total Coliform Rule, Coliform (TCR). 1 TRI-reporting industrial facility is also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Washington drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| SEQUIM CITY OF | 14,293 | 0 | Clean |
| WEST SEQUIM BAY INC | 2,759 | 0 | Clean |
| SUNLAND WATER DISTRICT | 2,235 | 0 | Clean |
| ESTATES INC | 1,043 | 0 | Clean |
| Solmar Water | 895 | 0 | Clean |
| MT. VISTA - DUNGENESS GOLF COURSE | 517 | 0 | Clean |
| DUNGENESS MEADOWS | 488 | 0 | Clean |
| MONTERRA | 464 | 0 | Clean |
| DUNGENESS BAY PLAT | 461 | 0 | Clean |
| Parkwood MFD Housing Community | 378 | 0 | Clean |
| MAINS FARM PROPERTY OWNERS | 358 | 0 | Clean |
| SUN MEADOWS | 295 | 0 | Clean |
| VISTAS INC | 241 | 1 | Health |
| FOUR SEASONS PARK | 225 | 1 | Health |
| DISCOVERY BAY VILLAGE | 191 | 0 | Clean |
| DUNGENESS BEACH | 181 | 0 | Clean |
| FLAURAS ACRES PROPERTYOWNER | 150 | 0 | Clean |
| OLYMPUS BEACH TRACTS | 143 | 0 | Clean |
| MAPLE GROVE | 132 | 0 | Clean |
| DISCOVERY BAY LEASEHOLDERS | 123 | 0 | Clean |
| WOODLAND HEIGHTS | 105 | 0 | Clean |
| JAMESTOWN ON WILCOX LANE | 94 | 0 | Clean |
| BAYWOOD VILLAGE MOBILE HOME PARK | 90 | 0 | Clean |
| HEART O THE HILLS | 76 | 0 | Clean |
| PANORAMA VISTA | 75 | 0 | Clean |
| GREEN ACRES MOBILE HOME PARK | 74 | 0 | Clean |
| CARLSBORG MOBILE ESTATES | 69 | 0 | Clean |
| FOREST RIDGE | 65 | 0 | Clean |
| MEADOWBROOK VILLAGE | 55 | 0 | Clean |
| HAPPY VALLEY ESTATES | 46 | 0 | Clean |
| BEACH | 45 | 1 | Health |
| BUENA VISTA ESTATES | 42 | 0 | Clean |
| CEDAR GROVE MOBILE PARK | 40 | 0 | Clean |
| ALDERWOOD EAST | 39 | 0 | Clean |
| OLYMPIC VIEW MOBILE PARK | 34 | 0 | Clean |
| OLYMPIC VIEW | 33 | 0 | Clean |
| BRANDT POINT | 32 | 0 | Clean |
| PALO VERDE | 30 | 0 | Clean |
| LOUELLA HEIGHTS | 28 | 0 | Clean |
| PETERSON-WHITTAKER | 26 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| FOUR SEASONS PARK | Lead and Copper Rule | 2024-03-30 |
| VISTAS INC | Revised Total Coliform Rule | 2018-10-01 |
| BEACH | Coliform (TCR) | 2014-11-01 |
What are Sequim's health-based records for?
Sequim's health-based violation records carry 3 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Coliform (TCR) | 1 | 1 |
| Lead and Copper Rule | 1 | 1 |
| Revised Total Coliform Rule | 1 | 1 |
TRI Facilities in Sequim
| Facility | Total Releases |
|---|---|
| Pacific Aerospace & Electronics Inc SE | 41.5K lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Sequim, Washington? ▼
How many water violations does Sequim have in this EPA extract? ▼
What contaminants were found in Sequim water? ▼
How many water systems serve Sequim? ▼
Where does Sequim get its drinking water? ▼
Are there pollution sources near Sequim? ▼
How does Sequim compare in Washington?
Of the 365 Washington places with at least one community water system on file, Sequim ranks #10 by number of systems (40).
Either side of it: Freeland (48), Arlington (43), Gig Harbor (36), Moses Lake (35)
About This Data
Figures here are the current EPA SDWIS extract joined to the 40 community water systems whose service area lists Sequim, ranked against the 365 Washington places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.