Massachusetts — 9th District
119th Congress · 124 ZIP codes · Avg score 64/100 · Grade C · Updated 2026-07-19
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-19
ZipCheckup tracks water safety for 124 ZIP codes in Massachusetts's 9th District: the district earns a grade C (64/100). 139 EPA violations on record, 18 health-based.
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in Massachusetts's 9th District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 02562 | Sagamore Beach | 83 | B | 0 |
| 2 | 02575 | West Tisbury | 83 | B | 1 |
| 3 | 02741 | New Bedford | 83 | B | 0 |
| 4 | 02742 | New Bedford | 83 | B | 0 |
| 5 | 02745 | New Bedford | 83 | B | 0 |
| 6 | 02746 | New Bedford | 83 | B | 0 |
| 7 | 02331 | Duxbury | 82 | B | 2 |
| 8 | 02367 | Plympton | 81 | B | 1 |
| 9 | 02340 | Hanover | 79 | B | 2 |
| 10 | 02330 | Carver | 78 | B | 10 (2 health) |
| 11 | 02359 | Pembroke | 78 | B | 0 |
| 12 | 02541 | Falmouth | 78 | B | 3 (2 health) |
| 13 | 02635 | Cotuit | 78 | B | 0 |
| 14 | 02638 | Dennis | 78 | B | 0 |
| 15 | 02645 | Harwich | 78 | B | 0 |
| 16 | 02660 | South Dennis | 78 | B | 0 |
| 17 | 02740 | New Bedford | 78 | B | 0 |
| 18 | 02743 | Acushnet | 78 | B | 4 |
| 19 | 02744 | New Bedford | 78 | B | 0 |
| 20 | 02362 | Plymouth | 77 | B | 4 |
| 21 | 02364 | Kingston | 77 | B | 4 (1 health) |
| 22 | 02370 | Rockland | 77 | B | 2 (1 health) |
| 23 | 02061 | Norwell | 76 | B | 2 |
| 24 | 02652 | North Truro | 76 | B | 1 |
| 25 | 02653 | Orleans | 76 | B | 1 |
| 26 | 02655 | Osterville | 76 | B | 1 |
| 27 | 02666 | Truro | 76 | B | 1 |
| 28 | 02535 | Chilmark | 75 | B | 3 |
| 29 | 02339 | Hanover | 74 | B | 2 |
| 30 | 02584 | Nantucket | 74 | B | 6 |
| 31 | 02631 | Brewster | 74 | B | 3 |
| 32 | 02325 | Bridgewater | 73 | B | 9 (2 health) |
| 33 | 02557 | Oak Bluffs | 73 | B | 0 |
| 34 | 02558 | Onset | 73 | B | 1 |
| 35 | 02601 | Hyannis | 73 | B | 0 |
| 36 | 02633 | Chatham | 73 | B | 0 |
| 37 | 02664 | South Yarmouth | 73 | B | 1 |
| 38 | 02338 | Halifax | 72 | B | 6 |
| 39 | 02361 | Plymouth | 72 | B | 4 |
| 40 | 02738 | Marion | 72 | B | 1 (1 health) |
| 41 | 02539 | Edgartown | 71 | B | 0 |
| 42 | 02563 | Sandwich | 71 | B | 1 |
| 43 | 02630 | Barnstable | 71 | B | 1 |
| 44 | 02642 | Eastham | 71 | B | 1 |
| 45 | 02324 | Bridgewater | 70 | B | 9 (2 health) |
| 46 | 02649 | Mashpee | 70 | B | 3 |
| 47 | 02025 | Cohasset | 69 | C | 3 |
| 48 | 02667 | Wellfleet | 69 | C | 7 |
| 49 | 02673 | West Yarmouth | 69 | C | 2 |
| 50 | 02790 | Westport | 69 | C | 3 |
Overview
Massachusetts's 9th District encompasses 124 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (64/100).
139 EPA violations have been recorded across this district's water systems. 18 are health-based violations. About 35% 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 - 50 violations
- Surface Water Treatment Rule - 21 violations
- Stage 1 DBP Rule - 10 violations
- Haloacetic Acids (HAA5) - 7 violations
- Contaminant 1039 - 7 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 124 ZIP codes in Massachusetts's 9th District.