STATE REPORT MA HEALTH VIOLATIONS: 60

Massachusetts Home Safety Profiles by ZIP

695 ZIP codes · 318 water systems · State-specific plumbing code

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData, NWS, State plumbing boards, Rewiring America

ZipCheckup tracks drinking-water and home-safety data for 695 ZIP codes across Massachusetts, covering 318 public water systems that serve about 6,908,374 people. 244 ZIP codes are mapped to at least one water system with an EPA violation on record.

695
ZIP Codes
318
Water Systems
244
ZIPs with Violations
State-specific
Plumbing Code
1
Avg Rebate Programs
B · 70
Avg Safety Score
3
ZIPs Mapped to a System Above the Lead Action Level
39%
EPA Radon Zone 1 (county-level potential)
#28
of 50 States
40%
ZIPs Rated A or B
52%
ZIPs with Violations
B
Massachusetts average: 70/100 - ranked #28 of 50 states. 3 points below the national average (73). Water systems mapped to 52% of ZIP codes have recorded violations.

Top-two-band states in ZipCheckup's grading include Massachusetts, based on the average of its ZIP-level scores.

Score Distribution

How Massachusetts's 695 ZIP codes are distributed across safety grades.

34
A
124
B
161
C
76
D
4
F
85-10070-8455-6940-540-39

Home Safety Scores by State

Loading map…
F (0-39) D (40-54) C (55-69) B (70-84) A (85+)

Model 4.0.0 inputs: EPA SDWIS, UCMR5 PFAS, EPA radon zones, annual county AQI •

Top 10 ZIP Codes by Home Safety Score in Massachusetts

Highest Home Safety Scores in the state.

#ZIP CodeCityCountyScoreGrade
1 02108 BostonSuffolk 100 A
2 02109 BostonSuffolk 100 A
3 02110 BostonSuffolk 100 A
4 02111 BostonSuffolk 100 A
5 02113 BostonSuffolk 100 A
6 02114 BostonSuffolk 100 A
7 02115 BostonSuffolk 100 A
8 02116 BostonSuffolk 100 A
9 02118 BostonSuffolk 100 A
10 02119 RoxburySuffolk 100 A

10 Lowest-Scoring ZIP Codes in Massachusetts

#ZIP CodeCityCountyScoreGradeViolations
1 01746 HollistonMiddlesex 37 F 32
2 01560 South GraftonWorcester 37 F 32
3 01581 WestboroughWorcester 38 F 56
4 01519 GraftonWorcester 38 F 30
5 01463 PepperellMiddlesex 40 D 30
6 01545 ShrewsburyWorcester 41 D 28
7 01536 North GraftonWorcester 41 D 27
8 01876 TewksburyMiddlesex 44 D 10
9 01776 SudburyMiddlesex 44 D 5
10 01949 MiddletonEssex 45 D 4

County Rankings

Water quality breakdown by county. 14 counties with data in Massachusetts.

Loading county map…
F (0-39) D (40-54) C (55-69) B (70-84) A (85+)

County-level aggregation of measured ZIP Home Safety Scores • EPA SDWIS, UCMR 5 PFAS, EPA radon zones, EPA AirData

CountyAvg ScoreGradeZIPsBest ZIPWorst ZIP
25001 79 B 55 02536 (83) 02675 (65)
25003 81 B 38 01220 (83) 01247 (67)
25005 75 B 44 02717 (83) 02766 (65)
25007 83 B 7 02539 (83) 02568 (82)
25009 57 C 59 01830 (67) 01949 (45)
25011 83 B 30 01301 (83) 01373 (82)
25013 83 B 53 01001 (83) 01034 (81)
25015 82 B 30 01002 (83) 01082 (67)
25017 57 C 108 01450 (67) 01746 (37)
25019 N/A N/A 4 N/A N/A
25021 72 B 46 02032 (83) 02056 (50)
25023 71 B 62 01752 (83) 02066 (57)
25025 100 A 57 02108 (100) 02152 (99)
25027 58 C 102 01331 (67) 01560 (37)

Most Common Contaminants in Massachusetts

Contaminant / RuleCategoryZIPs AffectedViolationsHealth Risk
Stage 1 DBP Rule Treatment Technique 114 183 Yes
Surface Water Treatment Rule Treatment Technique 52 70 No
Consumer Confidence Report Rule Reporting 43 70 Yes
Lead Inorganic 30 34 No
Contaminant 2931 Other 28 43 No
Contaminant 2946 Other 28 43 No
Total Trihalomethanes (TTHM) Disinfection Byproducts 26 40 Yes
Atrazine Organic 22 25 No

Overview

We track multi-source home safety signals for 695 ZIP records across Massachusetts. Home Safety Score model 4.0.0 is published for 399 scored records; missing required evidence suppresses the score.

The EPA snapshots used for this build directly map water systems to 472 ZIP records, covering 318 community water systems that serve approximately 6,908,374 people.

244 of 472 ZIP codes with a reported violation count in the available EPA record (52%) have recorded EPA violations. 60 health-based violations appear in the available health breakdown.

Plumbing Regulations

Massachusetts follows the Massachusetts Plumbing Code (248 CMR) (Current edition).

  • Plumbing code: State-specific (Current)
  • Homeowner DIY: Licensed plumber required
  • Water heater permit: Required
  • Annual backflow test: Required

Full Massachusetts regulations →

Energy & Water Rebates

Across 674 tracked ZIP codes in Massachusetts, residents have access to an average of 1 water-related rebate program - including incentives for heat pump water heaters, efficient fixtures, and plumbing upgrades.

Check rebates for your ZIP code →

Areas with Most Violations

ZIP Code City Home Safety Grade Violations Health-Based System
02056 Norfolk D 140 0 Norfolk Water Division
01740 Bolton — 121 0 Hudson Water Supply
01503 Berlin — 120 0 Hudson Water Supply
01749 Hudson D 120 0 Hudson Water Supply
02025 Cohasset C 62 0 Cohasset Water Department
02338 Halifax C 60 0 Halifax Water Department
01581 Westborough F 56 1 Westborough Water Department
01568 Upton C 35 0 Upton Dpw Water/wastewater Division
02747 North Dartmouth C 34 3 Dartmouth Water Division
02790 Westport — 34 3 Town of Westport

Areas with No Violations

ZIP Code City Home Safety Grade System Population
01001 Agawam B Agawam Water Department 28,692
01007 Belchertown B Belchertown Water District 3,253
01009 Bondsville — Thorndike Fire and Water District 1,435
01012 Chesterfield — Williamsburg Water Department 1,575
01013 Chicopee B Chicopee Water Department (mwra) 55,560
01022 Chicopee B Chicopee Water Department (mwra) 55,560
01026 Cummington — Worthington Fire District 565
01027 Easthampton B Easthampton Water Department 16,211
01030 Feeding Hills B Agawam Water Department 28,692
01032 Goshen — Williamsburg Water Department 1,575

Home Safety Score

Average Home Safety Score for Massachusetts: B (70/100) across 399 scored of 695 tracked ZIP records.

Model 4.0.0 uses the canonical components water-compliance, pfas-mcl-screen, radon-zone, annual-aqi across 3 required domains. The sections below provide additional context and do not change that score. Missing required evidence suppresses the score, and a favorable result is not a property-level safety certification.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0034 mg/L (EPA action level: 0.015 mg/L)
  • 3 of 469 ZIP codes with known status exceed the EPA lead action level

Radon Risk

  • High risk (Zone 1): 269 ZIP codes (39%)
  • Moderate risk (Zone 2): 376 ZIP codes
  • Low risk (Zone 3): 50 ZIP codes

ZIP Code Reports for Massachusetts

Largest Communities

ZIP Code City Population Safety Grade Violations
02138 Cambridge 874,906 D 0
02151 Revere 844,883 A 1
02467 Chestnut Hill 827,769 B 2
02139 Cambridge 793,861 D 0
02186 Milton 739,391 B 0
02215 Boston 738,838 A 0
02445 Brookline 738,838 B 0
02446 Brookline 738,838 B 0
02026 Dedham 717,277 C 1
02108 Boston 675,647 A 0
02109 Boston 675,647 A 0
02110 Boston 675,647 A 0
02111 Boston 675,647 A 0
02113 Boston 675,647 A 0
02114 Boston 675,647 A 0
02115 Boston 675,647 A 0
02116 Boston 675,647 A 0
02118 Boston 675,647 A 0
02119 Roxbury 675,647 A 0
02120 Roxbury Crossing 675,647 A 0

Lowest Published Home Safety Scores

ZIP Code City Score Grade Violations
01560 South Grafton 37 F 32
01746 Holliston 37 F 32
01519 Grafton 38 F 30
01581 Westborough 38 F 56
01463 Pepperell 40 D 30

Highest Published Home Safety Scores

ZIP Code City Score Grade Violations
02108 Boston 100 A 0
02109 Boston 100 A 0
02110 Boston 100 A 0
02111 Boston 100 A 0
02113 Boston 100 A 0

All 695 ZIP Codes in Massachusetts

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Largest water systems in Massachusetts

The 12 largest community water systems in Massachusetts, out of 318 in our data.

Show all 12 water systems

Systems with the most violations in Massachusetts

12 systems in Massachusetts with the most recorded EPA violations.

Frequently Asked Questions

Is the water safe to drink in Massachusetts?

Massachusetts has 318 community water systems serving 6,908,374 people across 695 ZIP codes. There are 935 recorded violations among these water systems, including 60 health-based. 244 of 695 ZIP codes are mapped to at least one water system with a recorded violation.

What plumbing code does Massachusetts follow?

Massachusetts's listed plumbing code type is State-specific as of our last review; local jurisdictions may adopt or amend codes. Plumbing work may require a licensed plumber; check state exemptions and local requirements.

Is lead a concern in Massachusetts's drinking water?

3 ZIP codes in Massachusetts are mapped to water systems whose reported 90th-percentile lead result exceeded the EPA action level of 0.015 mg/L.

What is the radon risk in Massachusetts?

39% of ZIP codes in Massachusetts are mapped to counties classified as EPA Radon Zone 1 (highest county-level radon potential).

How to cite this page

APA ZipCheckup. (2026). Massachusetts Home Safety Profiles by ZIP. https://zipcheckup.com/states/massachusetts/
BibTeX 
@misc{zipcheckup-states-massachusetts,
  author = {{ZipCheckup}},
  title  = {{Massachusetts Home Safety Profiles by ZIP}},
  year   = {2026},
  url    = {https://zipcheckup.com/states/massachusetts/}
}

Page version: October 2026.

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