2 county-level rules, plus city-specific rules for 1 city in Cook County, Illinois.
Verified from official government sources
Most Cook County water utilities draw from Lake Michigan under Illinois Department of Natural Resources allocation permits, which require demand-management ordinances limiting lawn watering, typically odd-even day rules and bans during peak afternoon hours.
Cook County has limited recycled water infrastructure compared to the Southwest. The Metropolitan Water Reclamation District of Greater Chicago provides reclaimed effluent for industrial cooling, irrigation, and biosolid reuse under Illinois EPA NPDES permits, but residential purple-pipe systems are rare.
1 cities in Cook County have their own water use rules rules. Each link goes to that city's dedicated page with code citations.
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Cook County Ordinance Hub →