Le Réseau National de Surveillance Aérobiologique (R.N.S.A.)

is the French aerobiology network in charge of the analysis of the content of the air in biological particles, and to give some information about their health impact. This activity began in 1985 to the Pasteur Institute. It is a private association "RNSA" since 1996.

RNSA collect pollen and moulds in the air, and clinical data, from 70 towns in France. In each great town, RNSA has a pollen trap (Burkard or Lanzoni), an analyst and a clinician. RNSA has nearly 65 pollen traps located on a central urban position over the roof of building, to be representative of the trend air quality.



Select a county on the map or in the list below :


  • Allergy risk:
  • nul
  • very low
  • low
  • moderate
  • high
  • very high

Vigilance map, updated 12th of February

In the Mediterranean area, the allergy risk is currently very high due to cypress pollens and locally ash pollens.
In other regions, the allergy risk remains very weak or weak.


Smartphone Apps

Many apps are now available. We would like to inform you that the data used are not the same for all of them: only forecast of the following apps are based on data coming from our traps:  "Alertes pollens", "Pollen", "ALlergiK", "Assitant Air", "Capt'air Bretagne" and some ATMO apps. Other apps use only modeled data.


Modelling in aerobiology makes pollination forecasts based on data of the previous years and on the weather forecasts of the days to come. These forecasts are not based on data recorded previous days/weeks. Modelling allows to get an overview of what to expect for the days to come, even if these forecasts are not 100% reliable. The following links are only for guidance.

Forecast for alder pollination:
Follow the pollination forecast of alder in France via COSMO-ART or SILAM projects.

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