Cheshire County, New Hampshire
28 ZIP codes · Avg score 64/100 · Grade C · Updated 2026-07-19
ZipCheckup grade for Cheshire: C.
A mixed picture - some signals here are worth your attention.
Cheshire County: 28 ZIP codes, mid-range safety grade.
How Cheshire County Compares
How Cheshire County Compares
Cheshire County scores 0 points above the New Hampshire state average (64/100) and 4 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-19
ZIP Code Risk Map
Water Quality Map: Cheshire 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: 12.3 (asthma 10.5%, diabetes 9.7%)
Estimated additional annual cost per homeowner: $1,496, driven primarily by flood
Infrastructure: 0.447% avg pipe failure probability, 73% of ZIPs at high risk
68.2% of homes built before 1978 (lead paint era)
Violation History (2021–2022)
→ Stable trendEPA violation counts by year across Cheshire County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 2 violations. Past 5 years: 3 total (3 health-based).
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: $1,496
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
35,535 housing units in Cheshire 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 Cheshire County
Remediation costs are relatively manageable for most homeowners in Cheshire 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 Cheshire County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Cheshire County
8 community water systems serving Cheshire County.
- C
- B
- C
- B
- B
- B
Show all 8 water systems
- B
- C
34 total water systems serve Cheshire County.
Systems with the most violations in Cheshire County
5 water systems with recorded EPA violations.
- C
- C
- B
- C
- C
All ZIP Codes in Cheshire County
28 ZIP codes tracked in Cheshire County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 03435 | Keene | 83 | B | 1 | — |
| 2 | 03451 | Hinsdale | 75 | B | 0 | $182K |
| 3 | 03455 | Marlborough | 75 | B | 0 | $252K |
| 4 | 03469 | West Swanzey | 75 | B | 0 | — |
| 5 | 03602 | Alstead | 75 | B | 0 | $250K |
| 6 | 03431 | Keene | 73 | B | 1 | $234K |
| 7 | 03446 | Swanzey | 72 | B | 0 | $251K |
| 8 | 03465 | Troy | 72 | B | 0 | $234K |
| 9 | 03452 | Jaffrey | 71 | B | 3 | $245K |
| 10 | 03470 | Winchester | 69 | C | 5 (1 health) | $250K |
| 11 | 03608 | Walpole | 69 | C | 7 | $301K |
| 12 | 03441 | Ashuelot | 63 | C | 0 | $304K |
| 13 | 03443 | Chesterfield | 63 | C | 0 | $299K |
| 14 | 03448 | Gilsum | 63 | C | 0 | $217K |
| 15 | 03456 | Marlow | 63 | C | 0 | $283K |
| 16 | 03462 | Spofford | 63 | C | 0 | $314K |
| 17 | 03466 | West Chesterfield | 63 | C | 0 | $316K |
| 18 | 03447 | Fitzwilliam | 58 | C | 0 | $274K |
| 19 | 03461 | Rindge | 58 | C | 0 | $344K |
| 20 | 03467 | Westmoreland | 58 | C | 1 | $323K |
| 21 | 03084 | Temple | 53 | D | 0 | $362K |
| 22 | 03445 | Sullivan | 53 | D | 0 | $211K |
| 23 | 03450 | Harrisville | 53 | D | 0 | $360K |
| 24 | 03457 | Nelson | 53 | D | 0 | $351K |
| 25 | 03601 | Acworth | 53 | D | 0 | $253K |
| 26 | 03604 | Drewsville | 53 | D | 0 | — |
| 27 | 03605 | Lempster | 53 | D | 0 | $215K |
| 28 | 03607 | South Acworth | 53 | D | 0 | $231K |
Recommended Buyer Guides for Cheshire County
Below: editorial picks, no sponsored placements.
- Best Water Filters for Lead — Lead above EPA action level in 3 ZIP codes
- Best Lead Paint Test Kits — 68.2% 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 Cheshire County, New Hampshire
Overview
Cheshire County in New Hampshire covers 28 ZIP codes with an average Home Safety Score of C (64/100).
6 of 28 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to New Hampshire 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.