CONGRESSIONAL DISTRICT DE

Delaware - At-Large

119th Congress · 97 ZIP codes · Avg score 81/100 · Grade B

Data: EPA SDWIS / Census 119th Congress

ZipCheckup's versioned Home Safety Profile covers 97 ZIP codes in Delaware's At-Large: the model 4.0.0 average is Grade B (81/100). 48 EPA violations on record, 10 health-based.

B
District Grade
81
Avg Safety Score
97
ZIP Codes
48
Total Violations
10
Health Violations
77
Water Systems
Best ZIP: 19901 (100/100)
Lowest ZIP: 19810 (66/100)

Top Contaminants

Surface Water Treatment Rule (15) Consumer Confidence Report Rule (14) Lead (9) Stage 1 DBP Rule (8) Groundwater Rule (2)

ZIP Codes in This District

97 ZIP codes from Delaware's At-Large are listed below. Showing top 50 by safety score.

# ZIP Code City Safety Score Grade Violations
1 19901 Dover 100 A 0
2 19902 Dover Afb 100 A 0
3 19904 Dover 100 A 0
4 19933 Bridgeville 100 A 1
5 19934 Camden Wyoming 100 A 0
6 19936 Cheswold 100 A 0
7 19943 Felton 100 A 1
8 19946 Frederica 100 A 0
9 19962 Magnolia 100 A 0
10 19963 Milford 100 A 0
11 19956 Laurel 97 A 6 (3 health)
12 19973 Seaford 96 A 8 (3 health)
13 19709 Middletown 83 B 0
14 19807 Wilmington 83 B 2
15 19930 Bethany Beach 83 B 2
16 19939 Dagsboro 83 B 2
17 19940 Delmar 83 B 0
18 19945 Frankford 83 B 1
19 19951 Harbeson 83 B 0
20 19958 Lewes 83 B 0
21 19966 Millsboro 83 B 1
22 19967 Millville 83 B 0
23 19968 Milton 83 B 0
24 19970 Ocean View 83 B 2
25 19971 Rehoboth Bch 83 B 0
26 19975 Selbyville 83 B 0
27 19977 Smyrna 83 B 0
28 19944 Fenwick Island 82 B 3
29 19947 Georgetown 81 B 4 (3 health)
30 19701 Bear 67 C 0
31 19702 Newark 67 C 0
32 19703 Claymont 67 C 0
33 19707 Hockessin 67 C 0
34 19711 Newark 67 C 0
35 19713 Newark 67 C 0
36 19808 Wilmington 67 C 0
37 19720 New Castle 66 C 1
38 19732 Rockland 66 C 1
39 19801 Wilmington 66 C 1
40 19802 Wilmington 66 C 1
41 19803 Wilmington 66 C 1
42 19804 Wilmington 66 C 1
43 19805 Wilmington 66 C 1
44 19806 Wilmington 66 C 1
45 19809 Wilmington 66 C 1
46 19810 Wilmington 66 C 1
47 19706 Delaware City N/A N/A 0
48 19708 Kirkwood N/A N/A N/A
49 19710 Montchanin N/A N/A N/A
50 19712 Newark N/A N/A N/A

Overview

Delaware's At-Large encompasses 97 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (81/100).

48 EPA violations have been recorded across this district's water systems. 10 are health-based violations. About 42% of the 60 ZIP records with a reported violation count have at least one violation.

Top Contaminants

The most frequently cited water quality issues in this district:

  • Surface Water Treatment Rule - 15 violations
  • Consumer Confidence Report Rule - 14 violations
  • Lead - 9 violations
  • Stage 1 DBP Rule - 8 violations
  • Groundwater Rule - 2 violations

Housing Context

Homes in this district were built on average around 1978 (~48 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.

Lead Alert: 3 ZIP codes in this district exceed the EPA action level for lead. Consider using a certified lead-removal filter.

Data Sources

Updated daily. Data covers 97 ZIP codes in Delaware's At-Large.

← Back to Delaware overview

How to cite this page

APA ZipCheckup. (2026). Lead Risk in Delaware At-Large (DE-0). https://zipcheckup.com/congressional/de-at-large/
BibTeX
@misc{zipcheckup-congressional-de-at-large,
  author = {{ZipCheckup}},
  title  = {{Lead Risk in Delaware At-Large (DE-0)}},
  year   = {2026},
  url    = {https://zipcheckup.com/congressional/de-at-large/}
}

Page version: October 2026.

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