>>8
はいよ
A boil water notice is issued by water utilities or health agencies as a precaution to protect consumers from drinking water that may have been contaminated with disease causing organisms (also called pathogens).

要約するとdiseaseをcausingするorganismsでcontaminatedされたwaterをそのままdrinkingしないようにってprecautionしてるんじゃないかな
名前の通りwaterをdrinkingする時はboilしろっていうnoticeなんだろう