Purpose:

To assess the impact of smoke-free laws on indoor air quality by monitoring particulate matter smaller than 2.5μm (PM 2.5) under both smoking and nonsmoking conditions in Kentucky, USA

Background:

• In April 2004, Lexington, Kentucky implemented the first comprehensive smoke-free ordinance in the state

• Tobacco smoke substantially contributes to indoor particle concentration in hospitality venues and can be greatly reduced by smoke-free laws.

Methods:

• Descriptive, prospective study of hospitality venues in Lexington (n = 10) and Louisville (n = 10)

• Pre-law in Lexington: Friday and Saturday, September 2003, 7:30 PM-12:30 AM

• Post-law and in Louisville without a law: September 2004, same times.

Measures

• Continuous light scattering particulate monitor (MetOne Aerocet 531) concealed in backpack

• Automatic 2-minute samples collected continuously before and after entering venue

• Data collected on room size, number of persons present, number of burning cigarettes and cigars, description of venue, temperature, relative humidity, air pressure at entryways, and maximum occupancy