This thesis uses information collected from five monitoring stations between 2000 and 2022 to present a comprehensive database analysis of the air quality in the urban area of Turin, with a focus on nitrogen oxides and particulate matter. The goal is to demonstrates a methodology for approaching pollutant concentration databases, and assess the impact of regulatory measures on air quality, determining whether introduced environmental policies have influenced the concentrations of nitrogen oxides (NO, NO$_2$, NO$_x$) and particulate matter (PM$_{10}$ and PM$_{2.5}$). The study uses publicly available datasets, that provide detailed daily and hourly measurements of pollutant concentrations from the Sistema Regionale di Rilevamento di ARPA Piemonte (database accessible at \href{https://aria.ambiente.piemonte.it/\#/qualita-aria/dati}{https://aria.ambiente.piemonte.it/\#/qualita-aria/dati}).