Abstract
Levels of gas and particle-phase substances present in the indoor air at nonindustrial sites in Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama; including offices, hospitals and restaurants, were measured during 1993 and 1994. Samples collected at 40 sites were analysed for respirable suspended particles (RSP, d(50) <3.5 µm), ultraviolet RSP (UY-RSP) as a marker for environmental tobacco smoke, carbon monoxide, carbon dioxide, and nicotine. Levels of RSP were very high at several sites, varying within the ranges of 34-421 µg/m^3 in restaurants, 21-242 µg/m^3 in hospitals and 13- 196 µg/m^3 in offices. Carbon monoxide levels were also high at several sites with peak concentrations reaching 29, 20, and 19 ppm, respectively, in an office, a hospital and a restaurant. Infiltration and penetration of outdoor pollutants into the indoor environment occurred at all sites studied.
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