Is there lead in Joliet's tap water?
6.5PPBparts per billion of lead in Joliet's water at the latest test, from January to June 2026
Under the legal limit of 15 ppb
Under the legal limit of 15 ppb
12 public water companies list Joliet as a place they supply. The biggest is Joliet's water department, with about 160,000 people. The highest latest result among Joliet's water companies is 6.5 parts per billion, at Joliet's water department. None of the 11 with results was above 15 at its latest test. 3 found too little lead to measure. Small ones like Garden Street Improvement Association supply just their own grounds or street; most of Joliet gets its water from Joliet's water department. 1 has no lead test results on file. 6 are small systems serving fewer than 500 people each, such as a mobile home park, a subdivision or a business with its own well. Your water bill names yours.
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