Alternative channels
Mail, text, and in-person payment instructions
Pay by text
A dedicated this detail was not publicly posted. The reviewed Illinois American Water East St. Louis customer pages do not publish a current text-to-pay keyword or SMS enrollment sequence.
Mail-in address
Illinois American Water, P.O. Box 6029, Carol Stream, IL 60197-6029. Customers should include the payment stub or account number with a check or money order.
Counters, drop boxes, and office hours
Illinois American Water’s Belleville customer service office is at 100 N. Water Works Drive, Belleville, IL 62223, generally open Monday-Friday 7:00 a.m.-3:00 p.m. and closed on holidays. The published payment material identifies checks, money orders, and credit/debit card payments; customers should confirm counter availability before traveling.