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The viewer provides the forecasted hourly concentrations of ground-level PM2.5 (based on satellite data processed by CAMS).

 Use this icon to select the date and region of interest

 Click on this icon to view the map in full screen mode

By clicking on the map, a chart showing the changes in hourly ground-level PM2.5 concentrations over the forecast period in a given location can be viewed.

The classification of the hourly PM2.5 concentrations in ambient air follows the one used by the up-to-date air quality data for Europe, where the five categories range from good (< 10 µg/m3) to very poor (> 50 µg/m3). The ambient air quality directives require that to protect human health, mean annual PM2.5 concentrations should not exceed 25 µg/m3.

In 2021, the World Health Organization (WHO) published new air quality guidelines to protect human health, updating the 2005 air quality guidelines on the basis of a systematic review of the latest scientific evidence of how air pollution damages human health. According to the new WHO guidelines, the mean annual concentration should not exceed 5 µg/m3, and the daily concentration should not exceed 15 µg/m3 more than 3-4 days per year. The European Commission published a proposal for a revision of the Ambient Air Quality Directive in October 2022, which aligns EU air quality standards more closely with 2021 WHO recommendations, and introduces limit values for all air pollutants currently subject to target values, except for ozone. For PM2.5, daily concentrations should not exceed 25 µg/m3 more than 18 times per calendar year and annual mean concentrations should not exceed 10 µg/m3 by 2030.

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This translation is generated by eTranslation, a machine translation tool provided by the European Commission.