Belknap County, New Hampshire
19 ZIP codes · Avg score 82/100 · Grade B
ZipCheckup grade for Belknap County: B.
This ZIP has a few items worth a quick check.
Residents of Belknap County can read the A-B grade as a starting point and then open their own ZIP report, one of 19 on this site.
How Belknap County Compares
How Belknap County Compares
Belknap County scores 8 points above the New Hampshire state average (74/100) and 9 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData
ZIP Code Risk Map
Water Quality Map: Belknap 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: 12.8 (asthma 10.3%, diabetes 10.5%)
Modeled additional annual cost estimate per homeowner: $1,054, largest modeled factor: Sea Level
53% of homes built before 1980 (lead paint was banned for residential use in 1978)
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 DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,054
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
40,498 housing units in Belknap 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 Belknap County
Modeled remediation costs in Belknap County can be compared with the median property value; actual costs vary by property.
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 Belknap County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems mapped to Belknap County ZIP codes
8 community water systems mapped to Belknap County ZIP codes; EPA may list more systems serving the county.
- B
Show all 8 water systems
- B
12 water systems mapped to Belknap County ZIP codes in our data; EPA may list more systems serving the county.
Systems with the most violations in Belknap County
5 water systems with violations in EPA records.
- B
- B
All ZIP Codes in Belknap County
19 ZIP codes tracked in Belknap County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 03246 | Laconia | 82 | B | 5 | $308K |
| 2 | 03218 | Barnstead | — | — | 0 | $305K |
| 3 | 03220 | Belmont | — | — | 0 | $265K |
| 4 | 03225 | Center Barnstead | — | — | 0 | $309K |
| 5 | 03226 | Center Harbor | — | — | $388K | |
| 6 | 03237 | Gilmanton | — | — | $318K | |
| 7 | 03247 | Laconia | — | — | — | |
| 8 | 03249 | Gilford | — | — | 15 (1 health) | $389K |
| 9 | 03252 | Lochmere | — | — | — | |
| 10 | 03253 | Meredith | — | — | 6 (3 health) | $445K |
| 11 | 03256 | New Hampton | — | — | $363K | |
| 12 | 03269 | Sanbornton | — | — | $393K | |
| 13 | 03276 | Tilton | — | — | 1 | $246K |
| 14 | 03289 | Winnisquam | — | — | — | |
| 15 | 03298 | Tilton | — | — | — | |
| 16 | 03299 | Tilton | — | — | — | |
| 17 | 03809 | Alton | — | — | 1 | $332K |
| 18 | 03810 | Alton Bay | — | — | 1 | $573K |
| 19 | 03837 | Gilmanton Iron Works | — | — | $366K |
Recommended Buyer Guides for Belknap County
These buyer guides are matched by rule rather than by hand - a PFAS record adds a PFAS filter guide, a lead action-level exceedance adds lead filter guides, a high share of pre-1978 homes adds lead paint test kits, EPA Radon Zone 1 add radon kits, and a top flood or wildfire risk adds related equipment.
- Best Water Filters for Lead — Lead above EPA action level in 3 ZIP codes
- Best Lead Paint Test Kits — 53% of homes built before 1980
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Belknap County, New Hampshire
Overview
Belknap County in New Hampshire covers 19 tracked ZIP records with an average Home Safety Score of B (82/100) across 1 scored records.
6 of 9 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 4 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.