Dust entry

Volcanic ash dust

Fine airborne particulate generated by volcanic eruptions and ashfall.

Airborne form

dust

The form describes what is suspended in air at the point of exposure. A material can produce more than one form, such as dust during handling and fume during heating.

Health effects

respiratory irritationasthma exacerbation concernsilicosis concern when crystalline silica is presenteye abrasion and irritation

Evidence

CDC and USGS state that inhaling volcanic ash can harm health; small particles can reach the lungs, ash can irritate the eyes and airways, and ash may contain crystalline silica capable of causing silicosis. People with pre-existing respiratory disease may be at increased risk.

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Volcanic ash · 2

Exposure to ash can be harmful. Ash is gritty, abrasive, sometimes corrosive ... Small ash particles can abrade (scratch) the front of the eye. Ash particles may contain crystalline silica, a material that causes a respiratory disease called silicosis.

Controls

follow local eruption guidance
avoid unnecessary ash exposure
wet or otherwise suppress settled ash
protect eyes
use a properly fitted NIOSH-approved respirator when advised
medical care for worsening respiratory symptoms