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 3rd of April

Birch pollens will cause a very high risk of allergy in the Ile de France, high in many departments at the north of a Bordeaux-Grenoble line and moderate over the rest of the country. Unfortunately for allergy sufferers, spring conditions are expected to last with a fairly generous sun that is expected to shine widely over most of the country in the coming days, which will cause high concentrations of birch pollen in the air.

The air also contains pollens from ash, hornbeam, poplar, willow, grasses, oak and plantain, but with a low risk of allergy.

In the south of the country, there are mainly cypress and plane tree pollens with a moderate risk of allergy.


Pollen forecasts

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:

Forecasts for alder pollination with COSMO-ART model

Forecasts for alder pollination with SILAM model

Forecasts for birch pollination with COSMO-ART model

Forecasts for birch pollination with SILAM model

Smartphone Apps

- The Alerte pollens app will help you to live your allergy without staying at home! Consult the RNSA pollen alerts, advices to handle your allergy day by day and services like weather forecast or air quality. You can configure up to 5 pollens and 5 departments. You can also activate the geolocation which will help to automatically display informations about the area you travel. Available on Play store and Apple store.

- The Pollen app, now available for France, provide a personnal pollen forecast for the 3 days to come in your area, taking into account your informations from the pollen diary and calculate your personnal level of exposure. Symptôms of allergy can be recorded and compared with the pollination in the pollen diary. Available on Google Play et l'App Store.

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