Abstract
This study attempts to analyze state of air quality in India from both long term and short term perspectives. Annual mean value of particulate matter concentration (PM) at one hundred thirty two locations in India reported by World health Organization (WHO) was analyzed. These locations were grouped in seven clusters according to severity of concentration of PM10 and PM2.5. Heuristic clustering (HC) was employed as clustering algorithm with Euclidian distance measure. Locations having worst concentration of PM concentration were identified using cluster profile summary. In second part of study, Air quality index of forty-two locations reported by Central Pollution Control Board (CPCB) was observed on monthly basis for a period of twelve months. The study resulted in three observations. First, no location under the study was able to satisfy WHO recommendation of annual mean value of PM. Second, majority of regions having worse air quality are located in northern part of India. Third, condition of air quality deteriorates in months between Novembers to February and May to June at several locations in India.
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