20250710 08553500 1.0 TRUE sdeEnterpriseWeb.DBO.CommunityWaterSystemBoundaries The purpose of this data is to show Thurston County's Group A, Group B and Group B Exempt community water system boundaries.Group A Public Water System is classified as a community system with 15 or more connections or serves greater than 25 or more people per day for 60 days or more per year. Group B Public Water System is classified as a community system with 3 to 14 connections and less than 25 people per day or serves 25 or more people per day during fewer than 60 days per year.Group B Exempt Public Water Systems are classified as community systems that were formerly Group B, by State DOH, but were downgraded to Exempt Systems due to their size/number of connections. These systems are no longer tracked by the State but are still tracked, under their previous ids/tags, by Thurston County. This change occured in 2016/2017.Thurston County water system boundaries. Group A systems was last updated September 20, 2010. The Group B & Group B Exempt Systems were updated June 28, 2017.Additional details and information about each system is tracked and maintained in the Amanda Permitting Database. Layer last updated by kah on 5/14/2018 Thurston County Public & Envrionmental Health Drinking Water Unit. Thurston GeoData Center.