History of pollen measurements

Historical data on the concentration of atmospheric pollen for each of the 25 pollen types identified in the Palinological Network of the Community of Madrid. Blank fields are due to different circumstances: * Not all collectors started working at the same time * There is always some small percentage of samples that can be lost and therefore there is no analysis. * Exceptional periods, such as the state of COVID alarm or the days of the Filomena storm that many samples were lost. For any clarification you can write sanidadambiental.polen@salud.madrid.org