The percentage of nonsmoking adults exposed to secondhand smoke (SHS) declined from 27.7% in 2009–2010 to 20.7% in 2017–2018.
During this period, decreasing trends in the percentage of persons with SHS exposure also were observed for nonsmoking non-Hispanic White, non-Hispanic Black, and Hispanic adults.
There was no significant decline in the percentage of persons with exposure for nonsmoking non-Hispanic Asian adults from 2011–2012 to 2017–2018.
The percentage of persons with SHS exposure was consistently higher for nonsmoking non-Hispanic Black adults throughout the period.
During 2017–2018, 41.5% of nonsmoking non-Hispanic Black adults were exposed to SHS compared with 22.7% non-Hispanic Asian, 17.8% non-Hispanic White, and 16.2% nonsmoking Hispanic adults.