Chicago is a large public water system in EPA region 05 that provides tap water for the 60601 - 60626, 60629 - 60634, 60637 - 60647, 60651 - 60657, 60660, 60661, 60707 zip codes. It has 3 facilities where the water supply was tested for 23 chemical contaminants that impact tap water quality and human health.
The maximum reported level of HAA5 (five regulated haloacetic acids) was 9.586 µg/L. There were 1 contamintants found in the Chicago water supply at levels that were above the minimum reporting level. 0 of the contaminants were above the reference level, which means they may pose a risk to human health.