Immission levels and identification of sulfur dioxide sources in La Oroya city, Peruvian Andes.

La Oroya is a city in the Peruvian Andes that has suffered a serious deterioration in its air quality, especially due to the high rate of sulfur dioxide (SO) emissions, which underlines the importance of knowing its sources of contamination and variation over the years. In this sense, this study aimed to evaluate the immission levels and determine the sources of SO contamination in La Oroya. This analysis was performed using the hourly concentration data of SO, and meteorological variables (wind speed and direction), which were analyzed for a period of three years (2018-2020).