Founded in 1979, AIRPARIF is the organisation responsible for monitoring the air quality in the Paris agglomeration, comprising 11 million inhabitants (19% of the total population) in nearly a 300 municipalities over a 12,000 km2 area. Its mission According to the 30 December 1996 law on Air, AIRPARIF is a non-profit organisation accredited by the Ministry of Environment to monitor the air quality in Ile -de-France. Its missions meet a regulatory requirement and come in four functions: To monitor air quality, to forecast pollution episodes, to assess the impact of emission reduction measures and to inform the authorities and citizens (daily during of an occurrence). AIRPARIF must continuously monitor the air quality and contribute to the assessment of health risks and environmental impacts.