Volcanic Activity Risk in Colorado
All Colorado counties ranked by FEMA National Risk Index volcanic activity score
Volcanic Activity risk — eruptions producing ashfall, lava, and pyroclastic hazards — is rated for 32 of 64 Colorado counties in FEMA's National Risk Index. Eagle County carries the state's highest volcanic activity score at 82.7, with $2K in expected annual volcanic activity losses.
No Colorado county reaches the High band for volcanic activity, and expected annual losses from volcanic activity total roughly $3K statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Volcanic Activity
| # | County | Volcanic Activity Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Eagle County | Very Low | 0.00 / yr | $2K | |
| 2 | Denver County | Very Low | 0.00 / yr | $170 | |
| 3 | Arapahoe County | Very Low | 0.00 / yr | $155 | |
| 4 | El Paso County | Very Low | 0.00 / yr | $172 | |
| 5 | Jefferson County | Very Low | 0.00 / yr | $139 | |
| 6 | Adams County | Very Low | 0.00 / yr | $123 | |
| 7 | Boulder County | Very Low | 0.00 / yr | $79 | |
| 8 | Douglas County | Very Low | 0.00 / yr | $85 | |
| 9 | Larimer County | Very Low | 0.00 / yr | $69 | |
| 10 | Weld County | Very Low | 0.00 / yr | $53 | |
| 11 | Garfield County | Very Low | 0.00 / yr | $18 | |
| 12 | Fremont County | Very Low | 0.00 / yr | $12 | |
| 13 | Broomfield County | Very Low | 0.00 / yr | $18 | |
| 14 | Summit County | Very Low | 0.00 / yr | $7 | |
| 15 | Teller County | Very Low | 0.00 / yr | $6 | |
| 16 | Elbert County | Very Low | 0.00 / yr | $6 | |
| 17 | Chaffee County | Very Low | 0.00 / yr | $5 | |
| 18 | Routt County | Very Low | 0.00 / yr | $6 | |
| 19 | Grand County | Very Low | 0.00 / yr | $4 | |
| 20 | Park County | Very Low | 0.00 / yr | $4 | |
| 21 | Pitkin County | Very Low | 0.00 / yr | $4 | |
| 22 | Clear Creek County | Very Low | 0.00 / yr | $2 | |
| 23 | Lake County | Very Low | 0.00 / yr | $2 | |
| 24 | Gilpin County | Very Low | 0.00 / yr | $1 | |
| 25 | Rio Blanco County | Very Low | 0.00 / yr | $1 | |
| 26 | Gunnison County | Very Low | 0.00 / yr | $1 | |
| 27 | Jackson County | Very Low | 0.00 / yr | $0 | |
| 28 | Mesa County | Very Low | 0.00 / yr | $0 | |
| 29 | Pueblo County | Very Low | 0.00 / yr | $0 | |
| 30 | Delta County | Very Low | 0.00 / yr | $0 | |
| 31 | Moffat County | Very Low | 0.00 / yr | $0 | |
| 32 | Saguache County | Very Low | 0.00 / yr | $0 |
32 Colorado counties with measurable volcanic activity risk. See the national volcanic activity ranking or all Colorado counties by overall risk.
Frequently Asked Questions
Which Colorado county has the highest volcanic activity risk?
Eagle County has the highest FEMA volcanic activity risk score in Colorado at 82.7 (Very Low), with $2K in expected annual losses and about 0.00 events per year.
How many Colorado counties face significant volcanic activity risk?
32 Colorado counties record measurable volcanic activity risk in FEMA's National Risk Index; 0 of them are rated High or Very High.