Counting the human cost of our city's emissions
Auckland also suffers from a visible ‘smoggy’ brown haze on average 30 days a year. Guidelines for arsenic, benzene and benzo(a) pyrene in the air are also close to being exceeded. Levels of particulate matter in Auckland’s air regularly exceed standards and guidelines including the government’s National Environmental Standards for Air Quality. Nitrogen oxides also exceed standards and guidelines from time to time.