Vashon Tap Water Quality Report
Vashon's water has 2 contaminants above EPA MCLGs. Consider using a certified water filter for additional protection.
Other systems listed for Vashon with results above guidelines: MAURY MUTUAL WATER CO (1 above guidelines), DOCKTON WATER ASSOCIATION (2 above guidelines), BURTON WATER COMPANY INC (1 above guidelines), WESTSIDE WATER ASSN (2 above guidelines)
People Served
3,723
Health-based violations since 2020
2
WATER DISTRICT 19. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Sep 2025 · WATER DISTRICT 19
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Vashon Tap Water Safe to Drink?
We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. Vashon's water has 2 contaminants above EPA health-based guidelines (MCLGs).
WATER DISTRICT 19, Vashon's water system, serves 3,723 people. 5 other systems are listed for Vashon. Each system's results are listed under its own name, never added to WATER DISTRICT 19's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for WATER DISTRICT 19 is from Sep 2025.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Washington
Vashon Water Service Areas
What these numbers actually mean for Vashon, WA
We read Vashon, WA’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 2 contaminants above EPA MCLGs and 1 contaminant with an EPA health goal detected in some samples (no level on file)
- 133 results on file
- 23 PFAS compounds on record
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Recommended Water Filters for Vashon
Based on Vashon's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs.
AquaTru
Classic
NSF Certified:
Flow Rate
0.04 gpm
Daily Production
600 gpd
Highlights:
- Best overall contaminant reduction score
- Most performance certifications
- Lifetime warranty
- NSF-42, NSF-53, NSF-58, NSF-401 certified
Removes 23 contaminants:
+18 more
Molybdenum, Barium, Chlorine, Arsenic, 83+ contaminants, Calcium, Chloride, Copper, Magnesium, Nitrate, Phosphorus, Sodium, Sulfate, Total Dissolved Solids, Zinc, Total THMs, Chloroform, Nitrate (as N)
AquaTru
Carafe
NSF Certified:
Flow Rate
0.3 gpm
Daily Production
4 gpd
Highlights:
- Verified PFAS reduction
- Glass collection vessel
- Plug-and-play installation
- NSF-53, NSF-42, NSF-58, NSF-401, NSF-372 certified
Removes 17 contaminants:
+12 more
Arsenic, 83+ contaminants, Copper, Total THMs, Chloroform, Chloride, Sulfate, Nitrate (as N), Molybdenum, Barium, Strontium, Uranium
Waterdrop
G3 P600
NSF Certified:
Flow Rate
600 gpm
Daily Production
600 gpd
Highlights:
- Space-saving design
- Good contaminant reduction
- NSF-58 certified
Removes 4 contaminants:
Waterdrop
G3 P800
NSF Certified:
Flow Rate
800 gpm
Daily Production
800 gpd
Highlights:
- High water production rate
- Modern design
- No tank needed
- NSF-42, NSF-53, NSF-58, NSF-372 certified
Removes 15 contaminants:
+10 more
Chlorine, Copper, Manganese, Potassium, Selenium, Total Dissolved Solids, Nitrate, Chloride, Sodium, Strontium
Test Your Water Quality
Professional laboratory testing provides accurate, detailed analysis of your drinking water.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
What Vashon's water readings can explain
Utility-reported data for Vashon includes turbidity and a chlorine-based disinfectant — the readings behind these common tap water questions. We publish a city-level hardness figure for Vashon, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Vashon? Public-water results do not apply to private wells. See King County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Vashon
Vashon's tap water has an estimated 3.7 grains per gallon (62.7 mg/L, county sampling in King County) — moderately hard on the USGS scale, below the range where scale is usually worth treating.
Water softener cost for an estimated 3.7 gpg water in Vashon — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For Washington as a whole, read water softener cost in Washington — priced against the plumber wage published for the state.
Frequently Asked Questions About Vashon Tap Water
Vashon's water has 2 contaminants above EPA MCLGs. We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach WATER DISTRICT 19. For a problem with your water now (discolored water, no water, low pressure, a leak), contact WATER DISTRICT 19 directly.
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