The invention provides a system for determining a risk level of a pollen-induced allergy of a user. The system comprises an input for receiving information relating to a pollen level in a location, an input for receiving information relating to a particulate matter level in the location and an input for receiving information relating to a sensitivity of a user to pollen allergen. The system further comprises a processor which is adapted to determine the risk level by taking account of the information relating to a pollen level, the information relating to a particulate matter level and the information relating to a sensitivity of the user to pollen allergen. A user interlace communicates the risk level in the location to the user.
