Water Use Rules in Cook County, IL (2026)
1 county-level rule, plus city-specific rules for 3 cities in Cook County, Illinois.
Verified from official government sources
Note: These county rules apply to unincorporated areas of Cook County. If you live within an incorporated city, that city's own rules apply: see the city list below.
Recycled Water Rules
Cook County requires a Building Commissioner permit before installing reclaimed (recycled) water, gray water, or on-site treated nonpotable water systems for buildings in unincorporated Cook County, with mandatory warning signage and annual cross-connection testing.
Cook County Recycled Water System Rules
Some RestrictionsCook County Code § 118-50
Where approved or required by the Building Commissioner, alternate water sources [reclaimed (recycled) water, gray water, and on-site treated nonpotable water] shall be permitted to be used instead of potable water for the applications identified in this chapter. ... It shall be unlawful for a person to construct, install, alter, or cause to be constructed, installed, or altered an alternate wa...
Water Use Rules by City in Cook County
3 cities in Cook County have their own water use rules rules. Each link goes to that city's dedicated page with code citations.
All Cook County ordinances
See every category we cover for Cook County: parking, noise, fences, fires, animals, pools, and more.
Cook County Ordinance Hub →