Chicago's Gateway Foundation is dedicated to providing low-cost residential alcohol and drug rehab treatment and transitional living for teens and adults. Free for those without insurance or means.
Chicago Independence further specializes in the provision of an intensive outpatient program (IOP) and the treatment of co-occuring disorders. Gateway is well respected and uses best practices.
Very worth a phone call to find out about a referral into the program as well as to inquire about possible wait times.