Carroll County, New Hampshire
30 ZIP codes · Home Safety Score unavailable · 0 of 30 tracked ZIP records scored · Updated
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: Carroll County, New Hampshire
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.9 (asthma 10%, diabetes 10.7%)
Estimated additional annual cost per homeowner: $1,299, driven primarily by flood
66.3% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Carroll County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 21 violations. Past 5 years: 55 total (55 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: $1,299
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
39,765 housing units in Carroll 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 Carroll County
Remediation costs are relatively manageable for most homeowners in Carroll 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 Carroll County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Carroll County
8 community water systems serving Carroll County.
Show all 8 water systems
10 total water systems serve Carroll County.
Systems with the most violations in Carroll County
4 water systems with recorded EPA violations.
All ZIP Codes in Carroll County
30 ZIP codes tracked in Carroll County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 03227 | Center Sandwich | — | — | $387K | |
| 2 | 03254 | Moultonborough | — | — | $517K | |
| 3 | 03259 | North Sandwich | — | — | $372K | |
| 4 | 03812 | Bartlett | — | — | 0 | $346K |
| 5 | 03813 | Center Conway | — | — | 23 | $215K |
| 6 | 03814 | Center Ossipee | — | — | 1 | $316K |
| 7 | 03816 | Center Tuftonboro | — | — | $401K | |
| 8 | 03817 | Chocorua | — | — | $352K | |
| 9 | 03818 | Conway | — | — | 23 | $284K |
| 10 | 03830 | East Wakefield | — | — | $313K | |
| 11 | 03832 | Eaton Center | — | — | 11 (7 health) | $348K |
| 12 | 03836 | Freedom | — | — | 0 | $370K |
| 13 | 03838 | Glen | — | — | 0 | $401K |
| 14 | 03845 | Intervale | — | — | 0 | $299K |
| 15 | 03846 | Jackson | — | — | $673K | |
| 16 | 03847 | Kearsarge | — | — | 22 | $412K |
| 17 | 03849 | Madison | — | — | 11 (7 health) | $359K |
| 18 | 03850 | Melvin Village | — | — | $424K | |
| 19 | 03853 | Mirror Lake | — | — | $518K | |
| 20 | 03860 | North Conway | — | — | 23 | $329K |
| 21 | 03864 | Ossipee | — | — | 1 | $252K |
| 22 | 03872 | Sanbornville | — | — | $320K | |
| 23 | 03875 | Silver Lake | — | — | 11 (7 health) | $387K |
| 24 | 03882 | Effingham | — | — | $277K | |
| 25 | 03883 | South Tamworth | — | — | $339K | |
| 26 | 03886 | Tamworth | — | — | $361K | |
| 27 | 03890 | West Ossipee | — | — | — | |
| 28 | 03894 | Wolfeboro | — | — | 0 | $435K |
| 29 | 03896 | Wolfeboro Falls | — | — | — | |
| 30 | 03897 | Wonalancet | — | — | — |
Recommended Buyer Guides for Carroll 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 Water Filters for PFAS — PFAS detected in 4 ZIP codes
- Best Water Filters for Lead — Lead above EPA action level in 2 ZIP codes
- Best Lead Paint Test Kits — 66.3% 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 Carroll County, New Hampshire
Overview
Carroll County in New Hampshire covers 30 tracked ZIP records. No Home Safety Score is published because the required model evidence is incomplete for every tracked record; missing evidence is not treated as zero.
9 of 14 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 New Hampshire 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.