Open Access
Subscription or Fee Access
Statistical Analysis of Air Quality Indices: A Study
R. Nimesh, S. Arora, K. K. Mahajan, A. N. Gill
Abstract
Polluted air has adverse effects on entire nature and living beings. To communicate with the common man about ambient air quality, “Air Quality Index” may be defined as a single number for reporting the air quality with respect to its effects on the human health. Air quality indices (AQIs) for the years 2009 and 2010 are computed for one of the main cities of India viz. Chandigarh using US Environmental Protection Agency (USEPA) and Factor Analysis approaches. Four air pollutants viz. RSPM, SPM, NOx, and SO2 are considered for computation of AQIs in five different zones of Chandigarh as per the guidelines of Chandigarh pollution control committee (CPCC). The responsible pollutant in all the zones and overall responsible pollutant have been identified. Various data exploratory techniques applied to AQIs revealed that they follow positively skewed distributions. Further, Kolmogorav–Smirnove test and Q-Q plots suggest that log normal distribution fits well to AQIs of NOX and log-log normal distribution is reasonably adequate for AQIs of pollutants SPM and RSPM. With the help of these fitted models, some probabilities for the responsible pollutants to fall into good and harmful categories are calculated, thereby indicating the possible health hazards for the population.
Keywords
AQI, Pollutants, USEPA, Breakpoints, Statistical distribution, Q-Q plots.
Full Text:
PDF
Disclaimer/Regarding indexing issue:
We have provided the online access of all issues and papers to the indexing agencies (as given on journal web site). It’s depend on indexing agencies when, how and what manner they can index or not. Hence, we like to inform that on the basis of earlier indexing, we can’t predict the today or future indexing policy of third party (i.e. indexing agencies) as they have right to discontinue any journal at any time without prior information to the journal. So, please neither sends any question nor expects any answer from us on the behalf of third party i.e. indexing agencies.Hence, we will not issue any certificate or letter for indexing issue. Our role is just to provide the online access to them. So we do properly this and one can visit indexing agencies website to get the authentic information. Also: DOI is paid service which provided by a third party. We never mentioned that we go for this for our any journal. However, journal have no objection if author go directly for this paid DOI service.
