New Mexico volcanic activity risk
Cibola County has the highest volcanic activity risk in New Mexico, scoring 69.1 out of 100 — rated "Very Low" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Cibola County | 69.1 | Very Low |
| 2 | Chaves County | 54.7 | Very Low |
| 3 | McKinley County | 52.4 | Very Low |
| 4 | Otero County | 49.2 | Very Low |
| 5 | Lincoln County | 47.6 | Very Low |
| 6 | Socorro County | 44.6 | Very Low |
| 7 | Roosevelt County | 38.1 | Very Low |
| 8 | Catron County | 37.8 | Very Low |
| 9 | Guadalupe County | 27.7 | Very Low |
| 10 | Torrance County | 24.1 | Very Low |
| 11 | De Baca County | 22.1 | Very Low |
| 12 | Bernalillo County | 21.2 | Very Low |
| 13 | Curry County | 18.9 | Very Low |
| 14 | Valencia County | 17.9 | Very Low |
| 15 | Quay County | 16.3 | Very Low |
| 16 | Sandoval County | 8.8 | Very Low |
| 17 | Sierra County | 8.5 | Very Low |
| 18 | Colfax County | 0 | No Rating |
| 19 | Doña Ana County | 0 | No Rating |
| 20 | Harding County | 0 | No Rating |
| 21 | Los Alamos County | 0 | No Rating |
| 22 | Mora County | 0 | No Rating |
| 23 | Rio Arriba County | 0 | No Rating |
| 24 | San Miguel County | 0 | No Rating |
| 25 | Santa Fe County | 0 | No Rating |
| 26 | Taos County | 0 | No Rating |
| 27 | Union County | 0 | No Rating |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Volcanic Activity risk nationally:
Other hazard risks in New Mexico:
Frequently asked questions
What is the highest volcanic activity risk county in New Mexico?
Cibola County, NM has the highest volcanic activity risk in New Mexico, with a FEMA National Risk Index score of 69.1 out of 100 (rated "Very Low").
What causes volcanic activity risk in New Mexico?
Volcanic activity risk reflects expected losses from lava flows, tephra fall, lahars (volcanic mudflows), and volcanic gases. The highest-risk counties are in Washington (Mt. Rainier), Oregon (Mt. Hood), and Hawaii (Kilauea, Mauna Loa). Alaska's Aleutian chain contains many active volcanoes affecting nearby communities and trans-Pacific air traffic. Volcanic ashfall events are reported at forecast-zone level in NOAA Storm Events and are not included in county-level counts.