ABSTRACT
A building's roof represents a critical pathway for atmospheric sediment to mix with rainwater, and atmospherically deposited particulate matter impacts many aspects of human life. This chapter assesses how rooftop deposition varies according to the season and how variables such as rainfall intensity, wind speed, and dry antecedent day (DAD) correlate with rooftop depositions. Fractionation tests (serial filtration) were conducted to obtain the range of the particle sizes and to enumerate the number of bacteria attached to the deposits. The quality of rainwater is significantly impacted by particulate matter deposition as well as the magnitude and type of microorganisms attached to the deposit, which is further dependent on the source, hygiene, and prevalence of wind speed. In short, this study will provide the vital link between atmospheric depositions and collected rainwater quality.
