Hancock County, Maine
44 ZIP codes · Avg score 64/100 · Grade C · Updated
ZipCheckup grade for Hancock County: C.
A mixed picture - some signals here are worth your attention.
For most households in Hancock County, the 44 tracked ZIP codes show adequate but uneven water quality.
How Hancock County Compares
How Hancock County Compares
Hancock County scores 1 points below the Maine state average (65/100) and 9 points below the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Hancock County, Maine
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.2 (asthma 12.1%, diabetes 11.2%)
Estimated additional annual cost per homeowner: $1,147, driven primarily by sea_level
60.3% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Hancock County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 13 violations. Past 5 years: 38 total (38 health-based). Health-based violations are rising versus the prior 2-year window - worth closer monitoring.
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
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,147
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
41,839 housing units in Hancock County
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 Hancock County
Remediation costs are relatively manageable for most homeowners in Hancock 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 Hancock County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Hancock County
8 community water systems serving Hancock County.
- C
- C
- C
- C
Show all 8 water systems
11 total water systems serve Hancock County.
Systems with the most violations in Hancock County
5 water systems with recorded EPA violations.
- C
- C
All ZIP Codes in Hancock County
44 ZIP codes tracked in Hancock County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 04609 | Bar Harbor | 67 | C | 0 | $452K |
| 2 | 04429 | Holden | 65 | C | 7 (2 health) | $268K |
| 3 | 04634 | Franklin | 64 | C | 4 | $236K |
| 4 | 04605 | Ellsworth | 60 | C | 12 (5 health) | $231K |
| 5 | 04408 | Aurora | — | — | $202K | |
| 6 | 04416 | Bucksport | — | — | 0 | $238K |
| 7 | 04420 | Castine | — | — | — | |
| 8 | 04421 | Castine | — | — | 0 | $558K |
| 9 | 04431 | East Orland | — | — | — | |
| 10 | 04472 | Orland | — | — | $261K | |
| 11 | 04476 | Penobscot | — | — | 0 | $261K |
| 12 | 04607 | Gouldsboro | — | — | 4 | $242K |
| 13 | 04612 | Bernard | — | — | $379K | |
| 14 | 04613 | Birch Harbor | — | — | — | |
| 15 | 04614 | Blue Hill | — | — | $333K | |
| 16 | 04616 | Brooklin | — | — | $314K | |
| 17 | 04617 | Brooksville | — | — | $359K | |
| 18 | 04624 | Corea | — | — | 4 | $371K |
| 19 | 04625 | Cranberry Isles | — | — | 5 | $400K |
| 20 | 04627 | Deer Isle | — | — | $266K | |
| 21 | 04629 | East Blue Hill | — | — | — | |
| 22 | 04635 | Frenchboro | — | — | — | |
| 23 | 04640 | Hancock | — | — | $238K | |
| 24 | 04642 | Harborside | — | — | — | |
| 25 | 04644 | Hulls Cove | — | — | — | |
| 26 | 04646 | Islesford | — | — | 5 | $403K |
| 27 | 04650 | Little Deer Isle | — | — | $334K | |
| 28 | 04653 | Bass Harbor | — | — | $335K | |
| 29 | 04660 | Mount Desert | — | — | 11 | $475K |
| 30 | 04662 | Northeast Harbor | — | — | 11 | $607K |
| 31 | 04664 | Sullivan | — | — | 4 | $209K |
| 32 | 04669 | Prospect Harbor | — | — | $261K | |
| 33 | 04672 | Salsbury Cove | — | — | — | |
| 34 | 04673 | Sargentville | — | — | $288K | |
| 35 | 04674 | Seal Cove | — | — | $306K | |
| 36 | 04675 | Seal Harbor | — | — | 11 | $529K |
| 37 | 04676 | Sedgwick | — | — | $280K | |
| 38 | 04677 | Sorrento | — | — | $266K | |
| 39 | 04679 | Southwest Harbor | — | — | 5 | $418K |
| 40 | 04681 | Stonington | — | — | $213K | |
| 41 | 04683 | Sunset | — | — | — | |
| 42 | 04684 | Surry | — | — | $278K | |
| 43 | 04685 | Swans Island | — | — | $316K | |
| 44 | 04693 | Winter Harbor | — | — | 4 | $187K |
Recommended Buyer Guides for Hancock County
Eight risk categories drive the selection - PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback - and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Lead Paint Test Kits — 60.3% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Hancock County, Maine
Overview
Hancock County in Maine covers 44 tracked ZIP records with an average Home Safety Score of C (64/100) across 4 scored records.
13 of 17 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 7 health-based violations appear in the available health breakdown.
← Back to Maine Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.