This study analysed air quality data from an extensive monitoring campaign conducted by the Ville de Québec and its partners. Air & Odour performed a statistical analysis to assess compliance levels, identify influencing factors, and uncover correlations between monitoring stations and various air pollutants. These insights help pinpoint sources of airborne particulate matter and metal contamination, contributing to a better understanding of urban air pollution in La Cité-Limoilou, Quebec City.