European governments measures air quality through dozens of certified ground measurement stations; including the PM values. Caeli provided datasets(.csv) aggregating all PM(2.5) values of 13 different countries - hourly measured between 01/2015 till 12/2022. Ground stations measure PM values every single hour at the point they are at. These measurements can be used in determining the air quality of a region. It is important to know that the measurement stations are calibrated to determine the accuracy of the data; this is done according to standards. The total amount of reference stations per country: • 073 stations : Austria • 073 stations : Belgium • 009 stations : Switzerland • 322 stations : Germany • 011 stations : Denmark • 338 stations : Spain • 028 stations : Finland • 263 stations : France • 095 stations : UK • 332 stations : Italy • 005 stations : Luxembourg • 050 stations : Netherlands • 067 stations : Norway Additional information about particulate matter(PM): Particulate matter, also known as particle pollution or PM, is a term that describes extremely small solid particles and liquid droplets suspended in the air. Some particulate matter, like soot, smoke, dust, or dirt, is large enough to see by the eye. Fine particulate matter is so small that it can only be seen through an electron microscope. PM2,5 describes fine inhalable particles, with diameters that are generally 2.5 micrometers and smaller. Particle pollution is produced by both primary and secondary sources. Primary particulate matter is emitted directly from construction sites, wildfires, wood burning, gravel pits, agricultural activities, and dusty storms. Secondary particulate matter is formed in the air by physical-chemical reactions from other pollutants such as sulfur dioxide (SO2), nitrogen oxides (NOx), ammonia (NH3), and volatile organic compounds (VOCs). The size of particles is directly linked to their potential for causing health problems. Fine particles (PM2.5) pose the greatest health risk. Fine particles can cause short-term health effects such as eye, nose, throat, and lung irritation, coughing, sneezing, and shortness of breath. In the long term, the impact of particulate matter can be more important such as aggravation of asthma, cough, and bronchitis in children, reduced lung function, reduced life expectancy, respiratory diseases, and lung cancer. ------------------------------------------------------------------------------------------ Are you interested in data measured by ground measuring stations or would you like to gather more information about our opportunities? Please, do not hesitate to contact us. www.caeli.space