Grafton County, New Hampshire
39 ZIP codes · Avg score 83/100 · Grade B · Updated
ZipCheckup grade for Grafton County: B.
This ZIP looks solid, with a few items worth a quick check.
Although county size varies, Grafton County's 39 ZIP codes share reliably safe tap water records and above-average compliance scores.
How Grafton County Compares
How Grafton County Compares
Grafton County scores 9 points above the New Hampshire state average (74/100) and 10 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 Last verified:
ZIP Code Risk Map
Water Quality Map: Grafton 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: 11.4 (asthma 10.4%, diabetes 9.3%)
Estimated additional annual cost per homeowner: $1,455, driven primarily by flood
64.9% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Grafton County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 5 violations. Past 5 years: 11 total (11 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: $1,455
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
51,222 housing units in Grafton 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 Grafton County
Remediation costs are relatively manageable for most homeowners in Grafton 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 Grafton County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Grafton County
8 community water systems serving Grafton County.
- B
- B
- B
- B
- B
Show all 8 water systems
- B
11 total water systems serve Grafton County.
Systems with the most violations in Grafton County
5 water systems with recorded EPA violations.
- B
- B
- B
All ZIP Codes in Grafton County
39 ZIP codes tracked in Grafton County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 03222 | Bristol | 83 | B | 0 | $257K |
| 2 | 03264 | Plymouth | 83 | B | 0 | $273K |
| 3 | 03561 | Littleton | 83 | B | 1 | $249K |
| 4 | 03755 | Hanover | 83 | B | 0 | $744K |
| 5 | 03766 | Lebanon | 83 | B | 1 (1 health) | $348K |
| 6 | 03784 | West Lebanon | 83 | B | 1 (1 health) | $341K |
| 7 | 03748 | Enfield | 82 | B | 8 (5 health) | $339K |
| 8 | 03215 | Waterville Valley | — | — | $377K | |
| 9 | 03217 | Ashland | — | — | 1 | $189K |
| 10 | 03223 | Campton | — | — | 6 (1 health) | $285K |
| 11 | 03238 | Glencliff | — | — | $190K | |
| 12 | 03240 | Grafton | — | — | $256K | |
| 13 | 03241 | Hebron | — | — | $402K | |
| 14 | 03245 | Holderness | — | — | $327K | |
| 15 | 03251 | Lincoln | — | — | $312K | |
| 16 | 03262 | North Woodstock | — | — | $306K | |
| 17 | 03266 | Rumney | — | — | $264K | |
| 18 | 03279 | Warren | — | — | $239K | |
| 19 | 03282 | Wentworth | — | — | $274K | |
| 20 | 03285 | Thornton | — | — | $290K | |
| 21 | 03293 | Woodstock | — | — | $450K | |
| 22 | 03574 | Bethlehem | — | — | $269K | |
| 23 | 03580 | Franconia | — | — | $470K | |
| 24 | 03585 | Lisbon | — | — | $215K | |
| 25 | 03586 | Sugar Hill | — | — | $609K | |
| 26 | 03740 | Bath | — | — | $219K | |
| 27 | 03741 | Canaan | — | — | $241K | |
| 28 | 03749 | Enfield Center | — | — | — | |
| 29 | 03750 | Etna | — | — | 0 | $798K |
| 30 | 03756 | Lebanon | — | — | — | |
| 31 | 03765 | Haverhill | — | — | $296K | |
| 32 | 03768 | Lyme | — | — | $651K | |
| 33 | 03769 | Lyme Center | — | — | — | |
| 34 | 03771 | Monroe | — | — | $257K | |
| 35 | 03774 | North Haverhill | — | — | 5 | $189K |
| 36 | 03777 | Orford | — | — | $262K | |
| 37 | 03779 | Piermont | — | — | $328K | |
| 38 | 03780 | Pike | — | — | 1 | — |
| 39 | 03785 | Woodsville | — | — | 1 | $196K |
Recommended Buyer Guides for Grafton County
Federal and certification sources drive the ordering: EPA monitoring data, NSF certifications, FEMA flood maps, and CDC lead guidance - guides surface only when county data warrants them.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Lead Paint Test Kits — 64.9% of homes built before 1978
- 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 Grafton County, New Hampshire
Overview
Grafton County in New Hampshire covers 39 tracked ZIP records with an average Home Safety Score of B (83/100) across 7 scored records.
9 of 13 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.