35 Ill. Adm. Code 375.103
Prohibitions
Section 375
Section 375.103 Prohibitions
a) Dry weather overflows are expressly prohibited under existing
regulations and are not eligible for consideration under the provisions of this
rule. Combined sewer overflow programs that will result in continued or future
dry weather overflows or treatment plant bypasses will not be approved by the
Agency.
b) This policy applies to overflow from combined sewer systems
and treatment plant bypasses resulting from wet weather flow conditions.
Overflows from separate sanitary sewers and from portions of combined sewer
communities served by separate sanitary sewers are not subject to this rule.