WaterQ

City Water Quality Rankings in Delaware

24 cities ranked by drinking water quality.

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Popular city water quality comparisons

Delmar, DE vs Frankford, DE Compare → Smyrna, DE vs Middletown, DE Compare → Milford, DE vs Selbyville, DE Compare → Rehoboth Beach, DE vs Georgetown, DE Compare →

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#1
Delmar
County, DE
100 A
#2
Frankford
County, DE
100 A
#3
Smyrna
County, DE
100 A
#4
Middletown
County, DE
99 A
#5
Milford
County, DE
98 A
#6
Selbyville
County, DE
98 A
#7
Rehoboth Beach
County, DE
97 A
#8
Georgetown
County, DE
96 A
#9
Lewes
County, DE
96 A
#10
New Castle
County, DE
96 A
#11
Milton
County, DE
94 A
#12
Newark
County, DE
94 A
#13
Dover
County, DE
93 A
#14
Blades
County, DE
92 A
#15
Bethany Beach
County, DE
90 A
#16
Long Neck
County, DE
90 A
#17
Bridgeville
County, DE
88 B
#18
Camden
County, DE
86 B
#19
Seaford
County, DE
84 B
#20
Felton
County, DE
83 B
#21
Laurel
County, DE
82 B
#22
Millsboro
County, DE
78 B
#23
Wilmington
County, DE
76 B
#24
Harrington
County, DE
71 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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