PDFWAC 388-61A-1155
What are the requirements for drinking water?
Water supplies that are used for human consumption must be from a water system that has been approved by the local health authority or department as safe for human consumption. This refers to both public water systems and individual systems.
[Statutory Authority: Chapter 70.123 RCW. WSR 18-09-015, ยง 388-61A-1155, filed 4/10/18, effective 5/11/18.]