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GROUP B WATER SYSTEMS

Island County Public Health

Drinking Water Program

April 16, 2026

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PUBLIC WATER SYSTEM*

Any water system providing piped water for human consumption, excluding a system serving only 1 single family residence.

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*Even if well is privately owned.

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Island County Public Health

Drinking Water Program

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GROUP B WATER SYSTEM

Public water system that provides drinking water to:

  • Fewer than 15 connections and
  • Fewer than 25 people per day OR
  • 25 or more people per day for fewer than 60 days per year

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Island County Public Health

Drinking Water Program

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REQUIREMENTS

Island County Code

ICC 8.09.060

Washington Administrative Code

WAC 246-291

Island County Public Health

Drinking Water Program

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REQUIREMENTS

Water Quality Testing

Management

  • Coliform bacteria
  • Nitrate
  • Chloride & conductivity, if source is in medium to very high seawater intrusion risk area
  • Update Water Facilities Inventory Form (WFI)
  • Notify & act on water quality results over MCL
  • Keep records of test results, notifications & actions
  • Use Satellite Management Agency, if required

Island County Public Health

Drinking Water Program

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RECOMMENDATIONS

Water Quality Testing

Management

  • Complete Inorganic Chemicals (primary & secondary contaminants)
  • Before and after treatment, if applicable
  • Inspect well, pump house, & sanitary control area
  • Check out resources from the County & State
  • Plan ahead

Island County Public Health

Drinking Water Program

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RESOURCES

Island County

Washington State

  • Drinking Water Program Webpage
  • Hydrogeology Program Webpage
    • Hydrogeology Map
    • Hydrogeology Dashboard
  • Group B Water Systems Webpage
  • Drinking Water System Database: Sentry

Island County Public Health

Drinking Water Program

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RESOURCES

Management Plan

  • Not required
  • Discussion points for decision makers
  • Simplified version of Small Water System Management Program

Island County Public Health

Drinking Water Program

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Comments?

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Suggestions?

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Questions?

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CONTACT INFO

Drinking Water Program

DrinkingWater@islandcountywa.gov

Island County Public Health

Drinking Water Program

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Aneta Hupfauer

AnetaH@islandcountywa.gov 360-678-7995

Tracy Hall

tracy.hall@islandcountywa.gov 360-320-5146