Mohammedia has an estimated population of approximately 220,000 inhabitants and covers an urban perimeter of about 3,320 ha (33.2 km²). Within this area, planted public green spaces represent approximately 241 ha (2.41 km²), while industrial zones occupy nearly 800 ha (8.0 km²). The city hosts major petrochemical and chemical in-dustries, as well as an important commercial port, making it one of the key industrial centers of the Casablanca–Settat region. In addition, Mohammedia is located along the main transportation corridor between Casablanca and Rabat, which generates signifi-cant road traffic flows and associated pollutant emissions. These demographic, spatial, and industrial characteristics make Mohammedia a particularly relevant case study for evaluating urban air quality monitoring strategies in medium-sized industrial cities.

Mohammedia houses roughly 220,000 residents across an urban area spanning about 3,320 hectares (33.2 km²). Public green spaces with planted vegetation make up around 241 hectares (2.41 km²) of this territory, while industrial areas take up close to 800 hectares (8.0 km²). The city serves as home to significant petrochemical and chemical manufacturing facilities, along with a major commercial port, establishing it as a crucial industrial hub within the Casablanca-Settat region. Furthermore, Mohammedia sits on the primary transport route linking Casablanca and Rabat, creating substantial vehicular traffic and the pollution that comes with it. These population, geographic, and industrial features position Mohammedia as an especially suitable location for studying air quality monitoring approaches in mid-sized industrial urban centers.