Seven of Sixteen Roadside Monitors Already Sit Above the Nitrogen Dioxide Ceiling Portugal Must Meet by 2030, and Avenida da Liberdade Passed This Year Only on Rounding
Zero and the CPSA read the state's own QualAr data for International Clean Air Day. Avenida da Liberdade and a Braga station broke the current 40 microgram limit in 2024, and against the 20 micrograms the EU sets for 2030, seven of sixteen traffic monitors are already over.