Make sure your facility is properly marked to identify hazardous materials and situations with these highly visible signs. They are available in two sizes, 10" w x 7" h and 14" w x 10"h and three materials - self adhesive vinyl, high-performance plastic, and aluminum.
The full text of this sign reads "DANGER Non-potable water. Do not use for drinking, washing, or cooking." This sign is also available in a 20" w x 14" version; please inquire.