Vashon Water Quality
Washington
According to EPA SDWIS, Vashon, Washington is served by 9 community water systems covering about 10,129 people. The same extract lists 4 health-based violation records, most recently coded 0800 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Vashon, Washington is delivered through 9 EPA-regulated community water systems serving an estimated 10,129 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 4 violation records across the 9 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 4 distinct EPA contaminant codes: Long Term 2 Enhanced Surface Water Treatment Rule, Total Haloacetic Acids (HAA5), Revised Total Coliform Rule, Surface Water Treatment Rule. 2 TRI-reporting industrial facilities are 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 |
|---|---|---|---|
| WATER DISTRICT 19 | 5,335 | 3 | Health |
| HEIGHTS WATER | 2,051 | 0 | Clean |
| DOCKTON WATER ASSOCIATION | 992 | 0 | Clean |
| BURTON WATER COOPERATIVE | 964 | 0 | Clean |
| Gold Beach Water Company | 390 | 0 | Clean |
| MAURY MUTUAL WATER CO | 233 | 0 | Clean |
| QUARTERMASTER HEIGHTS WATER ASSN | 70 | 0 | Clean |
| NEEDLE CREEK WATER SYSTEM | 50 | 1 | Health |
| SHAWNEE HILL CONDOMINIUM WS | 44 | 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 |
|---|---|---|
| WATER DISTRICT 19 | Long Term 2 Enhanced Surface Water Treatment Rule | 2025-08-01 |
| WATER DISTRICT 19 | Total Haloacetic Acids (HAA5) | 2020-04-01 |
| NEEDLE CREEK WATER SYSTEM | Revised Total Coliform Rule | 2020-03-01 |
| WATER DISTRICT 19 | Surface Water Treatment Rule | 2006-03-01 |
What are Vashon's health-based records for?
Vashon's health-based violation records carry 4 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 |
|---|---|---|
| Surface Water Treatment Rule | 1 | 1 |
| Long Term 2 Enhanced Surface Water Treatment Rule | 1 | 1 |
| Total Haloacetic Acids (HAA5) | 1 | 1 |
| Revised Total Coliform Rule | 1 | 1 |
TRI Facilities in Vashon
| Facility | Total Releases |
|---|---|
| Glacier Northwest Vashon Plant | 0 lbs |
| Pacific Research Laboratories | 0 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Vashon, Washington? ▼
How many water violations does Vashon have in this EPA extract? ▼
What contaminants were found in Vashon water? ▼
How many water systems serve Vashon? ▼
Where does Vashon get its drinking water? ▼
Are there pollution sources near Vashon? ▼
How does Vashon compare in Washington?
Of the 365 Washington places with at least one community water system on file, Vashon ranks #54 by number of systems (9).
Either side of it: Montesano (9), Mount Vernon (9), Belfair (8), Ellensburg (8)
About This Data
Figures here are the current EPA SDWIS extract joined to the 9 community water systems whose service area lists Vashon, 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.