Table 11. Color scale use by the Central American Air Quality Index (Índice Centroa- mericano (CCAD, 2011) de Calidad del Aire – ICCA). POLLU TANT CONCENTRATION COLOR INTERPRETATION (μg/m3) PM2.5 PM10 0 – 15.3 0 – 54 Good 15.5 – 40.2 56 – 154 Satisfactory 40.5 – 65.4 155 – 254 Slightly prejudicial 66 – 159 255 – 354 Prejudicial 160 – 250 355 – 424 Very prejudicial 251 – 500 424 – 604 Dangerous A common way of interpreting air pollution data is to account for the number of days within a set period when the concentration of a certain pollutant surpasses the accepted standard and can thus be harmful to human health. Table 12 and Figure 9 apply the ICCA scale to daily measurements reported by RED- CA at the Centro de Gobierno station. Table 12. Number and percentage of days per ICCA category, according to the PM2.5 values reported by the Centro de Gobierno REDCA station, during the period January 2009 – August 2016 (complete data sets in Annex 9). YEAR AIR Nº of Days: QUALITY PM2.5 sampling days. Days NOTE: The Nº of show below each year correspond to
Table 11. Color scale use by the Central American Air Quality Index (Índice Centroa- mericano de Calidad del Aire – ICCA). (CCAD, 2011) POLLU COLOR TANT CONCENTRATION (μg/m3) INTERPRETATION PM2.5 PM10 0 – 15.3 0 – 54 Good 15.5 – 40.2 56 – 154 Satisfactory 40.5 – 65.4 155 – 254 Slightly prejudicial 66 – 159 255 – 354 Prejudicial 160 – 250 355 – 424 Very prejudicial 251 – 500 424 – 604 Dangerous A common way of interpreting air pollution data is to account for the number of days within a set period when the concentration of a certain pollutant surpasses the accepted standard and can thus be harmful to human health. Table 12 and Figure 9 apply the ICCA scale to daily measurements reported by RED- CA at the Centro de Gobierno station. Table 12. Number and percentage of days per ICCA category, according to the PM2.5 values reported by the Centro de Gobierno REDCA station, during the period January 2009 – August 2016 (complete data sets in Annex 9). AIR QUALITY YEAR Nº of Days: NOTE: The Nº of Days show below each year correspond to PM2.5 sampling days.