Decrements in olfactory sensitivity due to ozone exposure.

Approximate olfactory thresholds were determined in an exploratory study in which subjects were exposed to ozone (O3). The odorants were butyl alcohol (BA) and acetic acid (AA). Preliminary data suggest (1) temporary increases in thresholds due to O3 exposure, (2) diminution of O3 effects with repeated exposures, and (3) greater and more reliable effects for BA than for AA.