Is Vashion Island, WA Tap Water Safe to Drink?
Graded B+, with 9 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
82.4/100
waterverge.com Vashion Island, WA — Water Quality Report
Vashion Island's drinking water received a grade of B+ (82.4 out of 100), indicating good water quality. The city's 3 water systems serve approximately 685 residents using groundwater.
Lead levels were measured at 2.2 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 118 violations on record, including 2 health-based violations. 9 remain unresolved.
What to know about Vashion Island's water
Vashion Island ranks #126 out of 294 cities in Washington for water quality, placing it mid-range in the state.
Vashion Island relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Vashion Island may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Vashion Island, WA water safe to drink?
Vashion Island's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (82.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 3 water systems serve approximately 685 residents using groundwater (wells).
Recent water quality updates for Vashion Island
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Vashion Island's water quality assessment. Grade: B+ (82.4/100).
Contaminants: Lead and Copper Rule.
Contaminants: Nitrate, Total Haloacetic Acids (HAA5), TTHM.
Contaminants: Revised Total Coliform Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Vashion Island's water supply.
Well within EPA limits.
Violation history
Vashion Island's water system has 118 total violations on record, including 2 health-based violations. 9 remain unresolved. 3 violations were issued in the last 5 years.
Where does Vashion Island's water come from?
Vashion Island's drinking water comes from groundwater (wells), supplied by 3 water systems serving approximately 685 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Vashion Island residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Vashion Island's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 2.2 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Vashion Island compares by contaminant
Explore where Vashion Island ranks among all Washington cities for specific contaminants.
Water source & infrastructure
Where Vashion Island's water comes from
Vashion Island's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by private ownership and serves approximately 685 people through 3 water systems.
Water systems serving Vashion Island
| System Name | PWSID | Population | Source |
|---|---|---|---|
| WESTSIDE WATER ASSN | WA5394950 | 562 | GW |
| SUNNYSLOPE MUTUAL WATER SYSTEM | WA5352550 | 85 | GW |
| MARINE ESTATES MUTUAL WATER ASSN | WA5351700 | 38 | GW |
How Vashion Island compares
Full Washington rankings →Vashion Island's score of 82.4/100 is above the average of 53/100 among major Washington cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Washington rankings →Learn more about your water
Guides and resources related to Vashion Island's water quality findings.
Explore water quality across King
Frequently asked questions
Is Vashion Island, WA tap water safe to drink?
Vashion Island's water quality earned a grade of B+ (82.4/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #126 out of 294 cities tested in Washington.
What contaminants are in Vashion Island's water?
Lead was measured at 2.2 ppb (90th percentile). 118 violations are on record.
How is Vashion Island's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Vashion Island?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Vashion Island's water come from?
Vashion Island's water is sourced from Groundwater. The city has 3 water systems serving approximately 685 residents.
What health violations has Vashion Island's water system had?
Vashion Island has 2 health-based violations on record. The most recent violation was recorded in January 2023. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 9 violations remain unresolved.
Is Vashion Island's groundwater at risk of contamination?
Vashion Island uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 118 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Vashion Island's water compare to other cities?
Vashion Island ranks #126 out of 294 cities in Washington (better than 57% of state cities) and #7007 out of 15744 cities nationally (56th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.