Over the past week in the region:

The pollen situation is calm.

Grass pollen season has begun, particularly ryegrass: information on pollen risks is available on the websites of the Pollinarium sentinel stations (Nantes, Saint-Nazaire, Angers, and Laval) (http://www.airpl.org/Pollens/pollinariums-sentinelles) and the National Aerobiological Monitoring Network (RNSA) (http://www.pollens.fr/docs/vigilance.html).