City and town drinking water records

Water systems serving Chicago, IL

1 community water system has a mapped service area in Chicago, IL. Chicago covers 99% of the area inside Chicago's Census boundary and reports serving 2,746,388 people in all.

It had no health-based violation in the last 10 years.

Its lead service line inventory lists 150,767 lead lines, 10,548 galvanized lines that must be replaced and 251,569 lines of unknown material.

Community water systems: 1
Systems with a health-based violation, last 10 years: 0
Systems with one unresolved: 1
Lead service lines in inventories: 150,767

Water systems serving Chicago

1 system

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System	Area	People served	Main source	Health-based violations, 10 years	Unresolved	Lead lines
Chicago	Covers 99% of Chicago	2,746,388	Surface water	0	2	150,767

Other cities and towns in Cook County

116 places

Back to Cook County, IL

Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations