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DOI: https://doi.org/10.4491/eer.2017.006
Assessment and comparison of three different air quality indices in China
Youping Li, Ya Tang, Zhongyu Fan, Hong Zhou, and Zhengzheng Yang
College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China
Corresponding Author: Youping Li ,Tel: +86-817-2568455, Fax: +86-817-2568455, Email: lyp920@163.com
Received: January 17, 2017;  Accepted: July 3, 2017.
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Air pollution index (API) is used in Mainland China and includes only SO2, NO2 and PM10. In 2016, Air Quality index (AQI) replaced API. AQI contains three more air pollutants (CO, O3 and PM2.5). Both the indices emphasize on the effect of a single pollutant, whereas the contributions of all other pollutants are ignored. Therefore, in the present work, a novel air quality index (NAQI), which emphasizes on all air pollutants, has been introduced for the first time. The results showed that there were 19 days (5.2%) in API, 28 days (7.7%) in AQI and 183 days (50.1%) in NAQI when the indices were more than 100. In API, PM10 and SO2 were regarded as the primary pollutants, whereas all five air pollutants in AQI were regarded as primary. Furthermore, four air pollutants (other than the CO) in NAQI were regarded as primary pollutants. PM10, as being the primary pollutant, contributed greatly in these air quality indices, and accounted for 51.2% (API), 37.0% (AQI) and 52.6% (NAQI). The results also showed that particulate matter pollution was significantly high in Luzhou, where stricter pollution control measures should be implemented.
Keywords: Air pollution index | Air quality index | Luzhou | Particulate matter
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