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Water rates in Oak Brook, IL

2 utilities serving Oak Brook. Estimated monthly bill at 6,000 gallons: $73.43 – $95.32 across 2 utilities. National average: $58.27.

Utility Population Monthly Bill
OAK BROOK 9,400 $95.32
AQUA ILLINOIS-OAK BROOK 5,361 $73.43

Each utility's bill is for a typical household (6,000 gallons a month, smallest meter) in its main service area. Rates can differ by location within a service area, including inside vs. outside city limits.