Delaware County Water Quality Reports
Water quality reports for all counties in Delaware. Browse by county to see safety scores, violations, and ZIP code data.
Browse water quality data by county in Delaware. Each county page lists all ZIP codes with safety scores and EPA violation data.
Kent County, DE: 11 Health Violations — 90/100 (2026)
2026 report: Kent County, DE scores 90/100 (Grade A). 20 ZIP codes analyzed. 40 EPA violations found. Free report with contaminant data and filter picks.
New Castle County, DE: 84 Violations — 76/100 (2026)
2026 report: New Castle County, DE scores 76/100 (Grade B). 52 ZIP codes analyzed. 84 EPA violations found. Free report with contaminant data and filter...
Sussex County, DE: Lead Above EPA Limits — 83/100 (2026)
2026 report: Sussex County, DE scores 83/100 (Grade B). 25 ZIP codes analyzed. 31 EPA violations found. Lead above EPA limits. Free report with contamin...
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