77 Ill. Adm. Code 390.2430
Sewage Disposal
Section 390
Section 390.2430Â Sewage
Disposal
a)Â Â Â Â Â Â Â Â All sewage and liquid wastes shall be discharged into a public
sewage system when available. (B)
b)Â Â Â Â Â Â Â Â When a public sewage system is not available, sewage and
liquid wastes shall be collected, treated, and disposed of in a private sewage
disposal system. The design, construction, maintenance, and operation of the
system shall comply with the "Department's rules entitled "Private
Sewage Disposal Code" (77 Ill. Adm. Code 905). (B)