Plymouth County, Massachusetts
64 ZIP codes · Avg score 65/100 · Grade C · Updated 2026-07-19
ZipCheckup grade for Plymouth: C.
A mixed picture - some signals here are worth your attention.
Water systems across Plymouth County's 64 ZIP codes produce average compliance results overall - pockets with documented violations exist, and the variation between areas makes ZIP-level lookup the most useful tool for residents here.
How Plymouth County Compares
How Plymouth County Compares
Plymouth County scores 1 points below the Massachusetts state average (66/100) and 3 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-19
ZIP Code Risk Map
Water Quality Map: Plymouth County, Massachusetts
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.1 (asthma 12.1%, diabetes 10.3%)
Estimated additional annual cost per homeowner: $2,753, driven primarily by flood
Infrastructure: 0.444% avg pipe failure probability, 67% of ZIPs at high risk
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Plymouth County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 7 violations. Past 5 years: 26 total (26 health-based). Health-based violations are declining versus the prior 2-year window.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $2,753
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Plymouth County
Remediation costs are relatively manageable for most homeowners in Plymouth 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 Plymouth County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Plymouth County
8 community water systems serving Plymouth County.
- B
- C
- C
- C
- C
- C
Show all 8 water systems
- B
- D
46 total water systems serve Plymouth County.
Systems with the most violations in Plymouth County
5 water systems with recorded EPA violations.
- C
- D
- C
- C
- C
All ZIP Codes in Plymouth County
64 ZIP codes tracked in Plymouth County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 02303 | Brockton | 83 | B | 1 | — |
| 2 | 02304 | Brockton | 83 | B | 1 | — |
| 3 | 02305 | Brockton | 83 | B | 1 | — |
| 4 | 02331 | Duxbury | 82 | B | 2 | — |
| 5 | 02367 | Plympton | 81 | B | 1 | $499K |
| 6 | 02379 | West Bridgewater | 81 | B | 1 | $501K |
| 7 | 02044 | Hingham | 80 | B | 3 | — |
| 8 | 02340 | Hanover | 79 | B | 2 | — |
| 9 | 01752 | Marlborough | 78 | B | 0 | $485K |
| 10 | 02330 | Carver | 78 | B | 10 (2 health) | $410K |
| 11 | 02359 | Pembroke | 78 | B | 0 | $550K |
| 12 | 02382 | Whitman | 78 | B | 0 | $456K |
| 13 | 02351 | Abington | 77 | B | 2 (1 health) | $516K |
| 14 | 02362 | Plymouth | 77 | B | 4 | — |
| 15 | 02364 | Kingston | 77 | B | 4 (1 health) | $562K |
| 16 | 02370 | Rockland | 77 | B | 2 (1 health) | $452K |
| 17 | 02061 | Norwell | 76 | B | 2 | $800K |
| 18 | 02333 | East Bridgewater | 76 | B | 1 | $474K |
| 19 | 02339 | Hanover | 74 | B | 2 | $706K |
| 20 | 02302 | Brockton | 73 | B | 1 | $395K |
| 21 | 02325 | Bridgewater | 73 | B | 9 (2 health) | — |
| 22 | 02558 | Onset | 73 | B | 1 | $427K |
| 23 | 02338 | Halifax | 72 | B | 6 | $443K |
| 24 | 02348 | Lakeville | 72 | B | 8 | — |
| 25 | 02361 | Plymouth | 72 | B | 4 | — |
| 26 | 02738 | Marion | 72 | B | 1 (1 health) | $586K |
| 27 | 02043 | Hingham | 70 | B | 3 | $1075K |
| 28 | 02324 | Bridgewater | 70 | B | 9 (2 health) | $501K |
| 29 | 02301 | Brockton | 68 | C | 1 | $414K |
| 30 | 02739 | Mattapoisett | 68 | C | 0 | $672K |
| 31 | 02332 | Duxbury | 67 | C | 2 | $826K |
| 32 | 02347 | Lakeville | 67 | C | 8 | $534K |
| 33 | 02341 | Hanson | 66 | C | 0 | $499K |
| 34 | 02018 | Accord | 63 | C | 0 | — |
| 35 | 02040 | Greenbush | 63 | C | 0 | — |
| 36 | 02350 | Monponsett | 63 | C | 0 | $310K |
| 37 | 02366 | South Carver | 63 | C | 0 | — |
| 38 | 02538 | East Wareham | 63 | C | 0 | $347K |
| 39 | 02571 | Wareham | 63 | C | 4 | $423K |
| 40 | 02718 | East Taunton | 63 | C | 0 | $437K |
| 41 | 02360 | Plymouth | 62 | C | 4 | $495K |
| 42 | 02050 | Marshfield | 58 | C | 5 | $623K |
| 43 | 02051 | Marshfield Hills | 55 | C | 0 | — |
| 44 | 02065 | Ocean Bluff | 55 | C | 0 | — |
| 45 | 02189 | East Weymouth | 55 | C | 0 | $463K |
| 46 | 02345 | Manomet | 55 | C | 0 | — |
| 47 | 02346 | Middleboro | 55 | C | 0 | $427K |
| 48 | 02381 | White Horse Beach | 55 | C | 0 | — |
| 49 | 02576 | West Wareham | 55 | C | 0 | $349K |
| 50 | 02717 | East Freetown | 55 | C | 0 | $513K |
| 51 | 02059 | North Marshfield | 53 | D | 0 | — |
| 52 | 02327 | Bryantville | 53 | D | 0 | — |
| 53 | 02337 | Elmwood | 53 | D | 0 | — |
| 54 | 02344 | Middleboro | 53 | D | 0 | — |
| 55 | 02349 | Middleboro | 53 | D | 0 | — |
| 56 | 02355 | North Carver | 53 | D | 0 | — |
| 57 | 02357 | North Easton | 53 | D | 0 | — |
| 58 | 02358 | North Pembroke | 53 | D | 0 | — |
| 59 | 02066 | Scituate | 51 | D | 5 (3 health) | $790K |
| 60 | 02020 | Brant Rock | 50 | D | 0 | — |
| 61 | 02041 | Green Harbor | 50 | D | 0 | — |
| 62 | 02047 | Humarock | 45 | D | 0 | $695K |
| 63 | 02532 | Buzzards Bay | 45 | D | 0 | $477K |
| 64 | 02045 | Hull | 40 | D | 0 | $606K |
Recommended Buyer Guides for Plymouth County
Where county records show a lead exceedance or pre-1978 housing concentration, lead-specific filters and test kits move toward the top of the list.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Plymouth County, Massachusetts
Overview
Plymouth County in Massachusetts covers 64 ZIP codes with an average Home Safety Score of C (65/100).
32 of 64 ZIP codes have recorded EPA violations. 13 health-based violations have been documented.
← Back to Massachusetts water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.