Section 604.1500  Cross Connections 

a)         No cross connection is allowed between water plant piping and any drain or sewer.  Backflow prevention installed within the water treatment facility must comply with the Illinois Plumbing Code (77 Ill. Adm. Code 890).

b)         No cross connection is allowed whereby an unsafe substance may enter a community water supply. 

c)         No cross connection is allowed between any portion of a community water supply distribution system and any other water supply that is not a community water supply.