Question 1

Which county in Delaware has the best water quality?

Accepted Answer

Kent County has the highest water quality score in Delaware at 100.0/100 (Grade: C), based on EPA SDWIS data.

Question 2

Which county in Delaware has the most water violations?

Accepted Answer

Sussex County has among the lowest water quality scores in Delaware at 100.0/100. See the individual county page for detailed violation history.

Question 3

Is the tap water safe to drink in Delaware?

Accepted Answer

Delaware has an average water quality score of 100.0/100 based on EPA Safe Drinking Water Act compliance data. Individual county scores vary — check your specific county's page for detailed information.

Question 4

What contaminants are found in Delaware water supplies?

Accepted Answer

Drinking water quality varies by county and water system. The EPA Safe Drinking Water Information System (SDWIS) tracks violations for contaminants like lead, nitrates, bacteria, and disinfection byproducts. See individual county pages for specific contaminant and violation history.

County	Water Score	Grade	Violations	Violation Rate
Kent County	100.0	C	13	9.0%
New Castle County	100.0	A	0	0.0%
Sussex County	100.0	C	34	9.9%

Delaware Water Quality

All Delaware Counties

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