Air Quality assesment in Nonthaburi Province in year 2005-2009

Thidaporn Inthanil, Thanit Intarat


The objective of this study was to create an air-quality map from a relationship between
air quality index and distribution of pollution in Nonthaburi province. All collected data were
obtained from 7 air-base stations of Pollution Control Department (PCD) and extracted to create
variables using yearly average data from 2005 – 2009. The extracted independent variables were
Sulfur dioxide (SO2), Nitrogen dioxide (NO2), Carbon monoxide (CO), Ozone (O3), and Particulate
Matter smaller than 10 microns (PM10); and, extracted dependent variable was Air quality index
The result revealed that Nonthaburi Province had air quality in moderate level. The
value of air quality index (75-78) stood in a range of 51-100 indicated that the pollution did not have
any impact on people in the study area. The relationship between dependent variable and
independent variable could be explained by Y = 17.031 + 1(O3) + 0.371 (PM10) + 0.454(NO2). From
the relationship, O3 played as an important role in this study. NO2 and PM10 also associated with
AQI, respectively.

Keywords: Dispersion, Air quality, Nonthaburi

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