Landslide Risk in New Hampshire
All New Hampshire counties ranked by FEMA National Risk Index landslide score
Landslide risk — downhill movement of rock, soil, and debris on unstable slopes — is rated for 10 of 10 New Hampshire counties in FEMA's National Risk Index. Grafton County carries the state's highest landslide score at 97.8, with $544K in expected annual landslide losses.
No New Hampshire county reaches the High band for landslide, and expected annual losses from landslide total roughly $695K statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Landslide
| # | County | Landslide Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Grafton County | Medium | 3.35 / yr | $544K | |
| 2 | Hillsborough County | Low | 0.96 / yr | $39K | |
| 3 | Coos County | Low | 2.54 / yr | $16K | |
| 4 | Merrimack County | Low | 1.29 / yr | $23K | |
| 5 | Carroll County | Low | 1.33 / yr | $17K | |
| 6 | Cheshire County | Low | 1.33 / yr | $19K | |
| 7 | Sullivan County | Low | 1.06 / yr | $14K | |
| 8 | Rockingham County | Low | 0.59 / yr | $11K | |
| 9 | Belknap County | Low | 0.59 / yr | $8K | |
| 10 | Strafford County | Very Low | 0.40 / yr | $4K |
10 New Hampshire counties with measurable landslide risk. See the national landslide ranking or all New Hampshire counties by overall risk.
Frequently Asked Questions
Which New Hampshire county has the highest landslide risk?
Grafton County has the highest FEMA landslide risk score in New Hampshire at 97.8 (Medium), with $544K in expected annual losses and about 3.35 events per year.
How many New Hampshire counties face significant landslide risk?
10 New Hampshire counties record measurable landslide risk in FEMA's National Risk Index; 0 of them are rated High or Very High.