COUNTY REPORT MA

Norfolk County, Massachusetts

55 ZIP codes · Avg score 66/100 · Grade C · Updated 2026-07-19

ZipCheckup grade for Norfolk: C.

A mixed picture - some signals here are worth your attention.

Water safety in Norfolk County is uneven - some of its 55 ZIP codes meet standards cleanly while others carry documented violations.

How Norfolk County Compares

Norfolk County66/100
Massachusetts avg66/100
National avg68/100

How Norfolk County Compares

C
County Grade
66/100
Avg Safety Score
55
ZIP Codes
45
Water Systems

Norfolk County scores 0 points above the Massachusetts state average (66/100) and 2 points below the national average (68/100).

Data: EPA SDWIS Last verified: 2026-07-19

C
County Grade
66
Avg Safety Score
55
ZIP Codes
Medway
Best ZIP: 02053 (83/100)
North Weymouth
Lowest ZIP: 02191 (45/100)
$623K
Median Home Value
$1,904
Avg Remediation (31% of home value)

ZIP Code Risk Map

Water Quality Map: Norfolk County, Massachusetts

Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.

A B C D F

Key Risk Factors

Health risk index: 10.5 (asthma 11%, diabetes 9.2%)

Estimated additional annual cost per homeowner: $2,419, driven primarily by flood

Infrastructure: 0.467% avg pipe failure probability, 79% of ZIPs at high risk

75.1% of homes built before 1978 (lead paint era)

Violation History (2021–2024)

→ Stable trend

EPA violation counts by year across Norfolk County water systems. Health-based shown in red, total in blue.

2021
16 (16 health)
2022
3 (3 health)
2023
8 (8 health)
2024
9 (9 health)

Peak year: 2021 with 16 violations. Past 5 years: 36 total (36 health-based).

Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.

County Health Indicators vs National Average

Asthma 11% (national: 8.9%)
Diabetes 9.2% (national: 10.5%)
Obesity 24.3% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1963
Median Build Year
75.1%
Pre-1978 Housing
47%
Pipe Failure Probability
79%
ZIPs at High Infra Risk
High
Lead Pipe Risk

Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $2,419

Flood $1,124/yr
Energy Code Gap $528/yr
Sea Level Rise $400/yr

Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).

Housing Age Distribution

367,923 housing units in Norfolk County

Pre-1940 31%
1940–1959 19%
1960–1979 21%
1980–1999 16%
2000+ 13%

Source: U.S. Census Bureau ACS B25034 (Year Structure Built).

Water Safety Affordability

How much it costs to fix water issues relative to home values in Norfolk County

$623K
Median Home Value
$1,904
Est. Remediation Cost
0.3%
of Home Value
Remediation as % of home value low burden

Remediation costs are relatively manageable for most homeowners in Norfolk County, representing a small fraction of property value.

Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.

Health Outcomes vs National Average

CDC PLACES data for Norfolk County residents

Asthma 11% (US avg: 8.9%)
Diabetes 9.2% (US avg: 11%)
Obesity 24.3% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water systems serving Norfolk County

8 community water systems serving Norfolk County.

Show all 8 water systems

45 total water systems serve Norfolk County.

Systems with the most violations in Norfolk County

5 water systems with recorded EPA violations.

All ZIP Codes in Norfolk County

55 ZIP codes tracked in Norfolk County.

# ZIP Code City Safety Score Grade Violations Home Value
1 02053 Medway 83 B 1 $589K
2 02054 Millis 83 B 0 $570K
3 02322 Avon 83 B 0 $483K
4 02445 Brookline 83 B 0 $1218K
5 02027 Dedham 82 B 1 (1 health) —
6 02185 Braintree 81 B 2 —
7 02038 Franklin 78 B 0 $567K
8 02052 Medfield 78 B 1 $869K
9 02067 Sharon 78 B 0 $698K
10 02081 Walpole 78 B 0 $647K
11 02188 Weymouth 78 B 1 $543K
12 02446 Brookline 78 B 0 $1173K
13 02492 Needham 78 B 0 $1177K
14 02021 Canton 76 B 1 $666K
15 02072 Stoughton 76 B 1 $497K
16 02762 Plainville 75 B 2 (2 health) $461K
17 02019 Bellingham 74 B 6 (4 health) $426K
18 02056 Norfolk 74 B 6 $694K
19 02482 Wellesley 74 B 2 $1255K
20 02026 Dedham 72 B 1 (1 health) $630K
21 02184 Braintree 71 B 2 $623K
22 02269 Quincy 71 B 0 —
23 02368 Randolph 70 B 4 $464K
24 02025 Cohasset 69 C 3 $1093K
25 02030 Dover 68 C 5 $1286K
26 02343 Holbrook 68 C 5 $435K
27 02186 Milton 66 C 0 $897K
28 02062 Norwood 65 C 0 $614K
29 02170 Quincy 64 C 0 $662K
30 02032 East Walpole 63 C 0 $673K
31 02070 Sheldonville 63 C 0 —
32 02071 South Walpole 63 C 0 $590K
33 02134 Allston 63 C 0 $587K
34 02137 Readville 63 C 0 —
35 02464 Newton Upper Falls 63 C 0 $899K
36 02494 Needham Heights 63 C 0 $1052K
37 02763 Attleboro Falls 63 C 0 $557K
38 02171 Quincy 59 C 0 $630K
39 02093 Wrentham 58 C 21 (11 health) $600K
40 02055 Minot 55 C 0 —
41 02060 North Scituate 55 C 0 —
42 02090 Westwood 55 C 0 $986K
43 02124 Dorchester Center 55 C 0 $607K
44 02126 Mattapan 55 C 0 $515K
45 02131 Roslindale 55 C 0 $634K
46 02132 West Roxbury 55 C 0 $714K
47 02136 Hyde Park 55 C 0 $566K
48 02190 South Weymouth 55 C 0 $555K
49 02467 Chestnut Hill 55 C 0 $1249K
50 02169 Quincy 54 D 0 $552K
51 02187 Milton Village 53 D 0 —
52 02457 Babson Park 53 D 0 —
53 02761 North Attleboro 53 D 0 —
54 02760 North Attleboro 50 D 0 $458K
55 02191 North Weymouth 45 D 0 $492K

Recommended Buyer Guides for Norfolk County

Designed to find the guide that fits the county, not the other way around - the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.

Deep Dive Reports

Detailed analysis for Norfolk County, Massachusetts

Overview

Norfolk County in Massachusetts covers 55 ZIP codes with an average Home Safety Score of C (66/100).

18 of 55 ZIP codes have recorded EPA violations. 19 health-based violations have been documented.

← Back to Massachusetts water quality report

Data Sources

Updated daily.

Frequently Asked Questions

Is water safe in Norfolk County?
Norfolk County receives a grade of C. Some ZIP codes have recorded violations and residents in affected areas may want to test their water.
How many water systems serve Norfolk County?
Norfolk County is served by 45 public water systems that supply drinking water to residents across 55 ZIP codes.
What is the biggest environmental risk in Norfolk County?
The primary environmental risk factor in Norfolk County is flood. This contributes to an estimated additional annual cost of $2,419 per homeowner.
How old are homes in Norfolk County?
The median home build year in Norfolk County is 1963. 75.1% of homes were built before 1978, which means they may contain lead-based paint and older plumbing materials.
How does Norfolk County compare to Massachusetts?
Norfolk County has an average water safety score of 66/100, which is above the Massachusetts state average of 66/100.

How to cite this page

APA ZipCheckup. (2026). Norfolk County, MA: 19 Health Violations - 66/100 (2026). https://zipcheckup.com/county/massachusetts/norfolk/
BibTeX 
@misc{zipcheckup-county-massachusetts-norfolk,
  author = {{ZipCheckup}},
  title  = {{Norfolk County, MA: 19 Health Violations - 66/100 (2026)}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/massachusetts/norfolk/}
}

Data as of July 2026.

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