Illinois Tap Water Quality: Is It Safe to Drink?
2026 EPA water quality data for 0 community water systems serving residents in Illinois. Find your water system to see violations, PFAS results, lead testing, and a safety grade — free.
Illinois draws drinking water from Lake Michigan (for Chicago and the northern suburbs) and from rivers and aquifers downstate. Radium contamination in deep wells has affected communities across the Fox River Valley and north-central Illinois. Lead from aging service lines is a significant concern in Chicago, which has more lead pipes than any other U.S. city.
Find Your Water System in Illinois
Enter your ZIP code to see EPA violations, lead test results, PFAS data, and a safety grade for your water.
📊 Data from EPA’s SDWIS
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🔄 Updated quarterly
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🏛️ 0+ water systems in Illinois