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
Top Contaminants
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
- Water quality violations: EPA Safe Drinking Water Information System (SDWIS)
- Congressional district boundaries: U.S. Census Bureau, 119th Congress
- Housing age: U.S. Census Bureau American Community Survey
Updated daily. Data covers 131 ZIP codes in Maryland's 7th District.