Ill. Admin. Code tit. 86, § 515.120 – Water and Sewer Assistance Charge Rates

a) $0.10 per month on each account for residential water service;
b) $0.10 per month on each account for residential sewer service;
c) $5 per month on each account for non-residential water service;
d) $5 per month on each account for non-residential sewer service. [305 ILCS 21/25]

The Water and Sewer Assistance Charge shall be assessed monthly for each customer account as follows: