The Pollution Control Department of
Thailand, PCD, has monitored the ambient air quality
in the Sukhumvit area for several years using both the
general station at Bangna and the roadside station at
On-Nuch. Based on their willingness to volunteer and
the location of their homes, the occupants of 14 shop
houses in which the owners and/or workmen live
upstairs, were invited to participate in this study,
especially those residing in non-smoking households.