A critical eye on the destructive impact of air pollution in Tehran is
needed as the basis for urban planning, protection policy and
management. This paper is focused on modeling in the GIS (Geospatial
Information System) to estimate the concentration of particulate matter
(PM) in any point of a typical part of Tehran which extends over 18.2
km2 and includes the so-called “Traffic Zone”. Many
important general hospitals are located in this region, some of which
are within the zone. The model is built on the data obtained in 42
stations located within the region. The results strongly indicate that
the concentrations of PM10, PM2.5 and PM1.0 of any points inside the
region, including the traffic zone, do not meet the required
international standard values. The extracted estimate values for the 22
hospitals reveal that the concentration of PM10 for “Azadi
Psychic”, “Children” and “Mustafa
Khomeini” hospitals are the worst, estimating from the model to
be 119.42 μg/m3, 107.09 μg/m3 and 101.14 μg/m3
respectively. The percent ratio of the mean concentrations of PM10/
PM2.5/ PM1.0 in this region is found to be approximately 7: 2: 1