CONGRESSIONAL DISTRICT MD

Maryland — 7th District

119th Congress · 131 ZIP codes · Avg score 67/100 · Grade C · Updated 2026-06-03

Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03

C
District Grade
67
Avg Safety Score
131
ZIP Codes
1725
Total Violations
108
Health Violations
33
Water Systems
Lothian
Best ZIP: 20711 (83/100)
Dundalk
Lowest ZIP: 21222 (45/100)

Top Contaminants

Consumer Confidence Report Rule (510) Contaminant 2020 (300) Contaminant 2959 (300) Contaminant 2384 (300) Lead (204)

ZIP Codes in This District

100 ZIP codes tracked in Maryland's 7th District. Showing top 50 by safety score.

# ZIP Code City Safety Score Grade Violations
1 20711 Lothian 83 B 0
2 21054 Gambrills 82 B 3 (1 health)
3 21158 Westminster 82 B 8 (1 health)
4 21057 Glen Arm 81 B 8 (2 health)
5 21201 Baltimore 81 B 33 (2 health)
6 21203 Baltimore 81 B 33 (2 health)
7 21205 Baltimore 81 B 33 (2 health)
8 21217 Baltimore 81 B 33 (2 health)
9 21233 Baltimore 81 B 33 (2 health)
10 21235 Baltimore 81 B 33 (2 health)
11 21240 Baltimore 81 B 33 (2 health)
12 21241 Baltimore 81 B 33 (2 health)
13 21250 Baltimore 81 B 33 (2 health)
14 21251 Baltimore 81 B 33 (2 health)
15 21260 Baltimore 81 B 33 (2 health)
16 21263 Baltimore 81 B 33 (2 health)
17 21264 Baltimore 81 B 33 (2 health)
18 21265 Baltimore 81 B 33 (2 health)
19 21268 Baltimore 81 B 33 (2 health)
20 21270 Baltimore 81 B 33 (2 health)
21 21273 Baltimore 81 B 33 (2 health)
22 21274 Baltimore 81 B 33 (2 health)
23 21275 Baltimore 81 B 33 (2 health)
24 21278 Baltimore 81 B 33 (2 health)
25 21279 Baltimore 81 B 33 (2 health)
26 21280 Baltimore 81 B 33 (2 health)
27 21281 Baltimore 81 B 33 (2 health)
28 21282 Baltimore 81 B 33 (2 health)
29 21283 Baltimore 81 B 33 (2 health)
30 21284 Baltimore 81 B 33 (2 health)
31 21285 Baltimore 81 B 33 (2 health)
32 21287 Baltimore 81 B 33 (2 health)
33 21288 Baltimore 81 B 33 (2 health)
34 21289 Baltimore 81 B 33 (2 health)
35 21290 Baltimore 81 B 33 (2 health)
36 21297 Baltimore 81 B 33 (2 health)
37 21298 Baltimore 81 B 33 (2 health)
38 21402 Annapolis 80 B 3
39 21404 Annapolis 80 B 3
40 21405 Annapolis 80 B 3
41 21411 Annapolis 80 B 3
42 21412 Annapolis 80 B 3
43 21144 Severn 77 B 2 (1 health)
44 21157 Westminster 77 B 8 (1 health)
45 21202 Baltimore 76 B 33 (2 health)
46 21206 Baltimore 76 B 33 (2 health)
47 21210 Baltimore 76 B 33 (2 health)
48 21212 Baltimore 76 B 33 (2 health)
49 21213 Baltimore 76 B 33 (2 health)
50 21214 Baltimore 76 B 33 (2 health)

Overview

Maryland's 7th District serving an estimated 132,546,353 residents encompasses 131 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (67/100).

1725 EPA violations have been recorded across this district's water systems. 108 are health-based violations. About 51% of tracked ZIP codes have at least one violation.

Top Contaminants

The most frequently cited water quality issues in this district:

  • Consumer Confidence Report Rule — 510 violations
  • Contaminant 2020 — 300 violations
  • Contaminant 2959 — 300 violations
  • Contaminant 2384 — 300 violations
  • Lead — 204 violations

Housing Context

Homes in this district were built on average around 1968 (~58 years old). Older homes may have lead pipes or solder — consider a water filter if your home predates 1986.

Data Sources

Updated daily. Data covers 131 ZIP codes in Maryland's 7th District.

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