Delaware Tap Water Quality: Is It Safe to Drink?
2026 EPA water quality data for 0 community water systems serving residents in Delaware. Find your water system to see violations, PFAS results, lead testing, and a safety grade — free.
Delaware is one of the few states where groundwater supplies the majority of drinking water, with the Columbia and Potomac aquifers serving most of the population. Nitrate contamination from poultry farming and agriculture affects many wells on the Delmarva Peninsula. PFAS contamination near Dover Air Force Base has required treatment upgrades.
Find Your Water System in Delaware
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 Delaware