Results from survey of environmental tobacco smoke in offices in Ottawa, Ontario

Abstract
A survey was performed in offices in Ottawa, Ontario to estimate non‐smoker exposure to environmental tobacco smoke (ETS). Portable air sampling systems were used to sample 31 offices for nicotine, ultraviolet particulate matter (UV‐PM, an ETS indicator), and carbon monoxide (CO). Mean concentrations of nicotine and UV‐PM were 7.2, and 24 μg.m−3, respectively. Exposure estimated from mean nicotine and UV‐PM results were 0.004 and 0.001 cigarette equivalent per hour, respectively.