Landslide Risk in Connecticut
All Connecticut counties ranked by FEMA National Risk Index landslide score
Landslide risk — downhill movement of rock, soil, and debris on unstable slopes — is rated for 9 of 9 Connecticut counties in FEMA's National Risk Index. Western Connecticut Planning Region carries the state's highest landslide score at 89.0, with $59K in expected annual landslide losses.
No Connecticut county reaches the High band for landslide, and expected annual losses from landslide total roughly $204K 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 | Western Connecticut Planning Region | Medium | 0.59 / yr | $59K | |
| 2 | Capitol Planning Region | Medium | 0.80 / yr | $44K | |
| 3 | Naugatuck Valley Planning Region | Low | 0.65 / yr | $39K | |
| 4 | Northwest Hills Planning Region | Low | 1.15 / yr | $30K | |
| 5 | Southeastern Connecticut Planning Region | Low | 0.46 / yr | $12K | |
| 6 | Lower Connecticut River Valley Planning Region | Low | 0.39 / yr | $9K | |
| 7 | South Central Connecticut Planning Region | Low | 0.16 / yr | $5K | |
| 8 | Northeastern Connecticut Planning Region | Very Low | 0.46 / yr | $5K | |
| 9 | Greater Bridgeport Planning Region | Very Low | 0.06 / yr | $1K |
9 Connecticut counties with measurable landslide risk. See the national landslide ranking or all Connecticut counties by overall risk.
Frequently Asked Questions
Which Connecticut county has the highest landslide risk?
Western Connecticut Planning Region has the highest FEMA landslide risk score in Connecticut at 89.0 (Medium), with $59K in expected annual losses and about 0.59 events per year.
How many Connecticut counties face significant landslide risk?
9 Connecticut counties record measurable landslide risk in FEMA's National Risk Index; 0 of them are rated High or Very High.