CONGRESSIONAL DISTRICT MD

Maryland — 4th District

119th Congress · 41 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03

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

C
District Grade
60
Avg Safety Score
41
ZIP Codes
14
Total Violations
7
Health Violations
3
Water Systems
Bowie
Best ZIP: 20716 (82/100)
Upper Marlboro
Lowest ZIP: 20772 (50/100)

Top Contaminants

Stage 2 DBP Rule (14)

ZIP Codes in This District

41 ZIP codes tracked in Maryland's 4th District.

# ZIP Code City Safety Score Grade Violations
1 20716 Bowie 82 B 2 (1 health)
2 20717 Bowie 82 B 2 (1 health)
3 20718 Bowie 82 B 2 (1 health)
4 20719 Bowie 82 B 2 (1 health)
5 20607 Accokeek 78 B 0
6 20613 Brandywine 78 B 0
7 20715 Bowie 77 B 2 (1 health)
8 20720 Bowie 77 B 2 (1 health)
9 20721 Bowie 77 B 2 (1 health)
10 20616 Bryans Road 63 C 0
11 20623 Cheltenham 63 C 0
12 20769 Glenn Dale 63 C 0
13 20799 Capitol Heights 63 C 0
14 20743 Capitol Heights 55 C 0
15 20745 Oxon Hill 55 C 0
16 20746 Suitland 55 C 0
17 20747 District Heights 55 C 0
18 20774 Upper Marlboro 55 C 0
19 20784 Hyattsville 55 C 0
20 20785 Hyattsville 55 C 0
21 20588 Dhs 53 D 0
22 20697 Southern Md Facility 53 D 0
23 20703 Lanham 53 D 0
24 20731 Capitol Heights 53 D 0
25 20738 Riverdale 53 D 0
26 20741 College Park 53 D 0
27 20749 Fort Washington 53 D 0
28 20750 Oxon Hill 53 D 0
29 20752 Suitland 53 D 0
30 20757 Temple Hills 53 D 0
31 20762 Andrews Air Force Base 53 D 0
32 20775 Upper Marlboro 53 D 0
33 20790 Capitol Heights 53 D 0
34 20791 Capitol Heights 53 D 0
35 20797 Southern Md Facility 53 D 0
36 20706 Lanham 50 D 0
37 20735 Clinton 50 D 0
38 20744 Fort Washington 50 D 0
39 20748 Temple Hills 50 D 0
40 20753 District Heights 50 D 0
41 20772 Upper Marlboro 50 D 0

Overview

Maryland's 4th District serving an estimated 878,240 residents encompasses 41 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (60/100).

14 EPA violations have been recorded across this district's water systems. 7 are health-based violations. About 17% of tracked ZIP codes have at least one violation.

Top Contaminants

The most frequently cited water quality issues in this district:

  • Stage 2 DBP Rule — 14 violations

Housing Context

Homes in this district were built on average around 1983 (~43 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 41 ZIP codes in Maryland's 4th District.

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