Maryland — 7th District
119th Congress · 48 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-07-17
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-17
ZipCheckup tracks water safety for 48 ZIP codes in Maryland's 7th District: the district earns a grade C (63/100). 451 EPA violations on record, 82 health-based.
Top Contaminants
ZIP Codes in This District
48 ZIP codes tracked in Maryland's 7th District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 21203 | Baltimore | 93 | A | 11 (2 health) |
| 2 | 21201 | Baltimore | 68 | C | 11 (2 health) |
| 3 | 21205 | Baltimore | 68 | C | 11 (2 health) |
| 4 | 21217 | Baltimore | 68 | C | 11 (2 health) |
| 5 | 21298 | Baltimore | 68 | C | 11 (2 health) |
| 6 | 21233 | Baltimore | 64 | C | 11 (2 health) |
| 7 | 21235 | Baltimore | 64 | C | 11 (2 health) |
| 8 | 21241 | Baltimore | 64 | C | 11 (2 health) |
| 9 | 21250 | Baltimore | 64 | C | 11 (2 health) |
| 10 | 21260 | Baltimore | 64 | C | 11 (2 health) |
| 11 | 21263 | Baltimore | 64 | C | 11 (2 health) |
| 12 | 21264 | Baltimore | 64 | C | 11 (2 health) |
| 13 | 21265 | Baltimore | 64 | C | 11 (2 health) |
| 14 | 21270 | Baltimore | 64 | C | 11 (2 health) |
| 15 | 21273 | Baltimore | 64 | C | 11 (2 health) |
| 16 | 21274 | Baltimore | 64 | C | 11 (2 health) |
| 17 | 21275 | Baltimore | 64 | C | 11 (2 health) |
| 18 | 21278 | Baltimore | 64 | C | 11 (2 health) |
| 19 | 21279 | Baltimore | 64 | C | 11 (2 health) |
| 20 | 21280 | Baltimore | 64 | C | 11 (2 health) |
| 21 | 21281 | Baltimore | 64 | C | 11 (2 health) |
| 22 | 21283 | Baltimore | 64 | C | 11 (2 health) |
| 23 | 21287 | Baltimore | 64 | C | 11 (2 health) |
| 24 | 21288 | Baltimore | 64 | C | 11 (2 health) |
| 25 | 21289 | Baltimore | 64 | C | 11 (2 health) |
| 26 | 21290 | Baltimore | 64 | C | 11 (2 health) |
| 27 | 21297 | Baltimore | 64 | C | 11 (2 health) |
| 28 | 21052 | Fort Howard | 63 | C | 0 |
| 29 | 21202 | Baltimore | 63 | C | 11 (2 health) |
| 30 | 21206 | Baltimore | 63 | C | 11 (2 health) |
| 31 | 21212 | Baltimore | 63 | C | 11 (2 health) |
| 32 | 21213 | Baltimore | 63 | C | 11 (2 health) |
| 33 | 21214 | Baltimore | 63 | C | 11 (2 health) |
| 34 | 21216 | Baltimore | 63 | C | 11 (2 health) |
| 35 | 21218 | Baltimore | 63 | C | 11 (2 health) |
| 36 | 21223 | Baltimore | 63 | C | 11 (2 health) |
| 37 | 21224 | Baltimore | 63 | C | 11 (2 health) |
| 38 | 21226 | Curtis Bay | 63 | C | 0 |
| 39 | 21239 | Baltimore | 63 | C | 11 (2 health) |
| 40 | 21215 | Baltimore | 58 | C | 11 (2 health) |
| 41 | 21229 | Baltimore | 58 | C | 11 (2 health) |
| 42 | 21230 | Baltimore | 58 | C | 11 (2 health) |
| 43 | 21231 | Baltimore | 58 | C | 11 (2 health) |
| 44 | 21207 | Gwynn Oak | 50 | D | 0 |
| 45 | 21227 | Halethorpe | 50 | D | 0 |
| 46 | 21228 | Catonsville | 50 | D | 0 |
| 47 | 21219 | Sparrows Point | 45 | D | 0 |
| 48 | 21222 | Dundalk | 45 | D | 0 |
Overview
Maryland's 7th District encompasses 48 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (63/100).
451 EPA violations have been recorded across this district's water systems. 82 are health-based violations. About 85% 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 - 205 violations
- Stage 2 DBP Rule - 82 violations
- Lead and Copper Rule - 41 violations
- Lead - 41 violations
- Contaminant 2384 - 41 violations
Housing Context
Homes in this district were built on average around 1939 (~87 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 48 ZIP codes in Maryland's 7th District.