Wellhead Protection Areas (1 year)

Polygons depict time of travel estimates for active public drinking water supplies. Source location data were obtained from the Washington State Department of Health, Office of Drinking Water. Data is updated Monday mornings. Check the "Data updated:" date in the Details section. Metadata dates are not automatically updated.本数据集的多边形要素用于呈现在用公共饮用水供水系统的通行时间估算结果。数据源点位数据取自华盛顿州卫生部饮用水办公室。数据于每周一上午更新。请查看详情板块中的「数据更新日期」条目。元数据（Metadata）的日期信息不会自动更新。