The Belgian aerobiological surveillance network


The Belgian pollen and fungal spore monitoring network was created in 1974 and the routine monitoring in Brussels started in 1982. The Mycology & Aerobiology service of Sciensano is in charge of its management. The main objective is to give rapid information about these allergens to practitioners, pharmaceutical companies and allergic sufferers. These data will help to determine a diagnosis and the eviction of high risk periods. The network stations are operational from January to September for pollen monitoring, and till November for fungal spores.


Publication of the results

Information about the most allergenic pollen present in the air in Brussels is available on the daily updated homepage.

The Pollen stations section contains information about the other monitoring stations. Graphics of these stations are weekly updated.

The Newsletters section shows an weekly overview of the cumulate counts of all the pollen types in all the stations, with complete graphics of the Brussels station and comments on the current situation.


Risk index for the grass pollen season

In Belgium, the grass pollen season usually last from mid May to mid July. During this period, we evaluate the daily risk to develop hay fever symptoms by taking into account the measured airborne pollen concentrations (pollen grains/m³) and the weather forecast. Thanks to a collaboration with the Royal Meteorological Institute, this risk index is published on the website


Financial support

The Belgian aerobiological surveillance network receives the financial support of:

  • Vlaams Agentschap Zorg en Gezondheid
  • Leefmilieu Brussel - Bruxelles Environnement
  • Service Public de Wallonie


Location of the monitoring stations

The network currently includes the following five stations: Brussels, De Haan, Genk, Marche-en-Famenne and Baudour.