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2026 Rankings
Carroll County, New Hampshire Home Safety Rankings - 36 ZIPs
Explore rankings under Home Safety Score model 4.0.0. Only ZIPs with all four required inputs are ranked; missing evidence is not imputed or reweighted.
Carroll County, New Hampshire (New Hampshire) includes 36 tracked ZIP codes and 13 mapped community water systems; confirm service for a specific address. Below are the water quality rankings for metro ZIPs with all required inputs.
Average Home Safety Grade: C (66/100)
| Grade | ZIP Codes | % |
|---|---|---|
| A | 0 | 0% |
| B | 0 | 0% |
| C | 3 | 100% |
| D | 0 | 0% |
| F | 0 | 0% |
Top 10 ZIP Codes by Home Safety Score
| Rank | ZIP | City | Score | Grade |
|---|---|---|---|---|
| 1 | 03840 | Greenland | 67 | C |
| 2 | 03801 | Portsmouth | 66 | C |
| 3 | 03885 | Stratham | 66 | C |
10 Riskiest ZIP Codes
| Rank | ZIP | City | Score | Grade | Risk Factor |
|---|---|---|---|---|---|
| 1 | 03885 | Stratham | 66 | C | 2 violation(s) |
| 2 | 03801 | Portsmouth | 66 | C | 1 violation(s) |
| 3 | 03840 | Greenland | 67 | C | — |
Most Common Contaminant Violations
| Contaminant | Violations | ZIPs Affected |
|---|---|---|
| Combined Radium | 21 | 3 |
| Lead and Copper Rule | 9 | 3 |
| Stage 1 DBP Rule | 6 | 6 |
| PFOA | 4 | 4 |
| PFNA | 4 | 4 |
| Monochloroacetic Acid | 4 | 4 |
| Dichloroacetic Acid | 4 | 4 |
| Bromodichloromethane | 4 | 4 |
Lead Risk
- Average of reported 90th-percentile lead results: 0.0047 mg/L (below EPA action level)
- 2 of 13 ZIP codes with known status exceed EPA lead action level
- 23% of housing built before 1950
- 38% of housing built before 1970
Cities in This Metro
- Portsmouth, NH — 4 ZIP codes
- Center Sandwich, NH — 1 ZIP code
- Moultonborough, NH — 1 ZIP code
- North Sandwich, NH — 1 ZIP code
- Bartlett, NH — 1 ZIP code
- Center Conway, NH — 1 ZIP code
- Center Ossipee, NH — 1 ZIP code
- Center Tuftonboro, NH — 1 ZIP code
- Chocorua, NH — 1 ZIP code
- Conway, NH — 1 ZIP code
- East Wakefield, NH — 1 ZIP code
- Eaton Center, NH — 1 ZIP code
- Glen, NH — 1 ZIP code
- Greenland, NH — 1 ZIP code
- Intervale, NH — 1 ZIP code
- Jackson, NH — 1 ZIP code
- Kearsarge, NH — 1 ZIP code
- Madison, NH — 1 ZIP code
- Melvin Village, NH — 1 ZIP code
- Milton Mills, NH — 1 ZIP code
- Mirror Lake, NH — 1 ZIP code
- North Conway, NH — 1 ZIP code
- Ossipee, NH — 1 ZIP code
- Sanbornville, NH — 1 ZIP code
- Silver Lake, NH — 1 ZIP code
- Effingham, NH — 1 ZIP code
- South Tamworth, NH — 1 ZIP code
- Stratham, NH — 1 ZIP code
- Tamworth, NH — 1 ZIP code
- West Ossipee, NH — 1 ZIP code
...and 3 more cities
All 36 ZIP Codes Ranked
View complete ranking
| Rank | ZIP | City | Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 03840 | Greenland | 67 | C | 0 |
| 2 | 03801 | Portsmouth | 66 | C | 1 |
| 3 | 03885 | Stratham | 66 | C | 2 |
| 4 | 03227 | Center Sandwich | — | — | — |
| 5 | 03254 | Moultonborough | — | — | — |
| 6 | 03259 | North Sandwich | — | — | — |
| 7 | 03812 | Bartlett | — | — | 0 |
| 8 | 03813 | Center Conway | — | — | 23 |
| 9 | 03814 | Center Ossipee | — | — | 1 |
| 10 | 03816 | Center Tuftonboro | — | — | — |
| 11 | 03817 | Chocorua | — | — | — |
| 12 | 03818 | Conway | — | — | 23 |
| 13 | 03830 | East Wakefield | — | — | — |
| 14 | 03832 | Eaton Center | — | — | 11 |
| 15 | 03838 | Glen | — | — | 0 |
| 16 | 03845 | Intervale | — | — | 0 |
| 17 | 03846 | Jackson | — | — | — |
| 18 | 03847 | Kearsarge | — | — | 22 |
| 19 | 03849 | Madison | — | — | 11 |
| 20 | 03850 | Melvin Village | — | — | — |
| 21 | 03852 | Milton Mills | — | — | — |
| 22 | 03853 | Mirror Lake | — | — | — |
| 23 | 03860 | North Conway | — | — | 23 |
| 24 | 03864 | Ossipee | — | — | 1 |
| 25 | 03872 | Sanbornville | — | — | — |
| 26 | 03875 | Silver Lake | — | — | 11 |
| 27 | 03882 | Effingham | — | — | — |
| 28 | 03883 | South Tamworth | — | — | — |
| 29 | 03886 | Tamworth | — | — | — |
| 30 | 03890 | West Ossipee | — | — | — |
| 31 | 03894 | Wolfeboro | — | — | 0 |
Data Sources
- Water quality: EPA SDWIS
- Housing: U.S. Census Bureau American Community Survey
- Flood: FEMA NFIP
- Flood scope: historical NFIP claim records and claim-rated-zone evidence; this is not current property-map coverage.
Reporting periods vary by source; the page metadata identifies this materialization.
Methodology
Model 4.0.0 averages SDWIS water compliance and UCMR5 PFAS within drinking water, then averages drinking water, county radon, and annual AQI as three equal domains. All four inputs are required. Score methodology → · Rankings methodology →
Model 4.0.0 averages SDWIS water compliance and UCMR5 PFAS within drinking water, then averages drinking water, county radon, and annual AQI as three equal domains. All four inputs are required. Score methodology → · Rankings methodology →
Disclaimer: Scores are based on EPA SDWIS reported data and are not a guarantee of current water safety. Water quality can change. For the most current information, contact your local water utility or request a Consumer Confidence Report.
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How to cite this page
APA
ZipCheckup. (2026). Carroll County, New Hampshire Home Safety Rankings - 36 ZIPs. https://zipcheckup.com/rankings/metro/carroll-new-hampshire/
BibTeX
@misc{zipcheckup-rankings-metro-carroll-new-hampshire,
author = {{ZipCheckup}},
title = {{Carroll County, New Hampshire Home Safety Rankings - 36 ZIPs}},
year = {2026},
url = {https://zipcheckup.com/rankings/metro/carroll-new-hampshire/}
}
Page version: October 2026.
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