WaterQ

City Water Quality Rankings in Delaware

24 cities ranked by drinking water quality.

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Popular city water quality comparisons

Frankford, DE vs Selbyville, DE Compare → Smyrna, DE vs Middletown, DE Compare → Milford, DE vs Rehoboth Beach, DE Compare → New Castle, DE vs Milton, DE Compare →

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#1
Frankford
County, DE
100 A
#2
Selbyville
County, DE
100 A
#3
Smyrna
County, DE
100 A
#4
Middletown
County, DE
99 A
#5
Milford
County, DE
98 A
#6
Rehoboth Beach
County, DE
97 A
#7
New Castle
County, DE
96 A
#8
Milton
County, DE
94 A
#9
Blades
County, DE
92 A
#10
Bethany Beach
County, DE
90 A
#11
Georgetown
County, DE
90 A
#12
Long Neck
County, DE
90 A
#13
Newark
County, DE
90 A
#14
Lewes
County, DE
89 B
#15
Bridgeville
County, DE
88 B
#16
Camden
County, DE
86 B
#17
Frederica
County, DE
84 B
#18
Seaford
County, DE
84 B
#19
Felton
County, DE
83 B
#20
Laurel
County, DE
82 B
#21
Wilmington
County, DE
73 C
#22
Dover
County, DE
70 C
#23
Harrington
County, DE
69 C
#24
Millsboro
County, DE
69 C

Frequently Asked Questions

How are city water quality rankings calculated in Delaware?

WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.

Can I compare two cities in Delaware?

Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.

How often does WaterQ refresh city data?

City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.

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