Showing posts with label Air quality. Show all posts
Showing posts with label Air quality. Show all posts

Method for calculating the index of air quality


Grid computing the index of air quality


ContaminationIndexMajor PollutantsOther Pollutants
NO2O3PM10COSO2
Very high> 100> 400> 240> 180> 20000> 500
High10040024018020000500
762011819110001301
Average752001809010000300
51101121517501101
Low50100120507500100
26516126500151
Very Low25506025500050
000000
  • NO2 , O3 , SO2 : hourly value / maximum hourly value in μg/m3
  • PM 10 : hourly value / maximum hourly value or average daily adjusted μg/m3
  • CO: moving average 8 hours / moving average maximum of 8 hours in μg/m3

The air quality is rated on a 5-point scale from 0 (low pollution) over 100 (very high pollution). It is based on three main pollutants: PM 10 (particulate matter), NO(nitrogen dioxide), O3(ozone) and may consider two additional pollutants that is to say, CO (Carbon monoxide  and SO(sulfur dioxide) to the cities for which data are available.

Calculating air quality is based on a review of various local
 measures air quality and reflects . to as much as possible the alert thresholds or daily limits In order to make comparable cities and to overcome the nature of the monitoring network, two indices are defined.
  • Index background (global), representing the general situation of the agglomeration (based on urban background monitoring sites)
  • Index near traffic, representing busy roads (based on monitoring stations along the route)