Against this backdrop, Kaduna State in Nigeria has experienced rapid urbanization and industrialization, raising concerns about air quality. CO emissions from various sources, including fossil fuel combustion, industrial processes, land-use changes, and waste management, contribute significantly to air pollution . This study aims to assess CO levels in residential and industrial zones of Kaduna State from 2016 to 2023. By identifying sources of CO and CO2 emissions and evaluating air quality status, the research intends to provide valuable insights for policymakers to implement effective mitigation measures and improve environmental and public health outcomes.