Group B Water Systems

Group B Public Drinking Water systems provide water to more than 93,000 people in Clark County. Group B Public Drinking Water systems may meet any of the following criteria:

  • Serves between 3-14 residential connections on separate parcels and less than 25 individuals per day.
  • Non-residential serving less than 25 people per day (i.e. childcare centers, small businesses, places of worship, etc.)


Applicants are responsible for collecting water samples for analysis by a Washington State Certified Laboratory. In addition to the water analysis requirements for two connection Group B water systems, systems with 3 or more connections must also conduct a complete inorganic chemical and physical analysis of primary and secondary chemical and physical standards.

How to apply

Clark County Environmental Health
PO Box 9825
Vancouver, WA 98666

Group B public drinking water system approval

A Water Availability and Verification Evaluation for Group B water systems may be required before Clark County Community Development will issue building permits.

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