35 Ill. Adm. Code 301.260
Combined Sewer Service Area
Section 301
Section 301.260 Combined
Sewer Service Area
"Combined Sewer Service
Area" means a specific geographical drainage area served by a combined
sewer system. Areas served by separate sewer systems which enter the combined
system are not included. Undeveloped areas within a combined sewer service
area may be included in that area if deemed appropriate by the Agency under the
guidelines in 35 Ill. Adm. Code 306.102.