Massachusetts — 7th District
119th Congress · 37 ZIP codes · Avg score 73/100 · Grade B · Updated 2026-07-17
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-17
ZipCheckup tracks water safety for 37 ZIP codes in Massachusetts's 7th District: the district earns a grade B (73/100). 41 EPA violations on record, 0 health-based.
Top Contaminants
ZIP Codes in This District
37 ZIP codes tracked in Massachusetts's 7th District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 02228 | East Boston | 99 | A | 0 |
| 2 | 02205 | Boston | 92 | A | 3 |
| 3 | 02216 | Boston | 92 | A | 3 |
| 4 | 02295 | Boston | 92 | A | 3 |
| 5 | 02298 | Boston | 92 | A | 3 |
| 6 | 02111 | Boston | 89 | A | 3 |
| 7 | 02163 | Boston | 89 | A | 3 |
| 8 | 02199 | Boston | 89 | A | 3 |
| 9 | 02150 | Chelsea | 88 | A | 0 |
| 10 | 02115 | Boston | 84 | B | 3 |
| 11 | 02116 | Boston | 84 | B | 3 |
| 12 | 02118 | Boston | 84 | B | 3 |
| 13 | 02128 | Boston | 84 | B | 3 |
| 14 | 02215 | Boston | 84 | B | 3 |
| 15 | 02119 | Roxbury | 73 | B | 0 |
| 16 | 02120 | Roxbury Crossing | 73 | B | 0 |
| 17 | 02121 | Dorchester | 73 | B | 0 |
| 18 | 02143 | Somerville | 70 | B | 0 |
| 19 | 02144 | Somerville | 70 | B | 0 |
| 20 | 02368 | Randolph | 70 | B | 4 |
| 21 | 02122 | Dorchester | 65 | C | 0 |
| 22 | 02125 | Dorchester | 65 | C | 0 |
| 23 | 02129 | Charlestown | 65 | C | 0 |
| 24 | 02145 | Somerville | 65 | C | 0 |
| 25 | 02134 | Allston | 63 | C | 0 |
| 26 | 02137 | Readville | 63 | C | 0 |
| 27 | 02141 | Cambridge | 63 | C | 0 |
| 28 | 02142 | Cambridge | 63 | C | 0 |
| 29 | 02149 | Everett | 61 | C | 1 |
| 30 | 02139 | Cambridge | 58 | C | 0 |
| 31 | 02140 | Cambridge | 58 | C | 0 |
| 32 | 02239 | Cambridge | 56 | C | 0 |
| 33 | 02124 | Dorchester Center | 55 | C | 0 |
| 34 | 02126 | Mattapan | 55 | C | 0 |
| 35 | 02131 | Roslindale | 55 | C | 0 |
| 36 | 02136 | Hyde Park | 55 | C | 0 |
| 37 | 02135 | Brighton | 53 | D | 0 |
Overview
Massachusetts's 7th District encompasses 37 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (73/100).
41 EPA violations have been recorded across this district's water systems. None are health-based. About 38% 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 - 36 violations
- Fecal Coliform - 3 violations
- Stage 1 DBP Rule - 1 violation
- Total Trihalomethanes (TTHM) - 1 violation
Housing Context
Homes in this district were built on average around 1935 (~91 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 37 ZIP codes in Massachusetts's 7th District.