Table 1.

List of monitoring stations and pollutants detected in the three study cities.

Cities	Station Name	Geographic Coordinates	Zone Type *	Station Type *	Monitored Pollutants
Torino	Consolata	N 45°04′33.300′′ E 07°40′40.896′′	Urban	Traffic	NOx, NO2, NO, CO2, SO2, CO, O3, PM10, Heavy metal 1, Benzene, PAH 2.
	Rubino	N 45°02′30.762′′ E 07°37′33.324′′	Urban	Traffic	NOx, NO2, NO, CO2, SO2, CO, O3, PM10, PM2.5, Heavy metal 1, Benzene, PAH 2.
	Rebaudengo	N 45°06′13.821′′ E 07°41′42.531′′	Urban	Traffic	NOx, NO2, CO2, SO2, CO, PM10, PM2.5 Heavy metal 1, Benzene, PAH 2.
	Druento-La Mandria	N 45°10′23.3′′ E 07°33′38.0′′	Rural	Background	NO2, NO, NOx, PM10, O3, Heavy metal 1, PAH 2
Perugia	Parco Cortonese	N 43°06′15.701′′ E 12°21′48.788′′	Urban	Traffic	NOx, NO2, NO, CO2, SO2, CO, PM10, PM2.5, O3, Benzene, PAH 2
	Fontivegge	N 43°06′19.065′′ E 12°22′32.131′′	Urban	Traffic	NOx, NO2, NO, CO2, CO, PM10, PM2.5, O3, Benzene, PAH 2
	Torgiano-Brufa	N 43°03′58.9′′ E 12°28′08.7′′	Rural	Background	NO, NO2, NOx, O3, PM10, PM2.5
Lecce	Garigliano	N 40°21′48.203′′ E 18°10′22.215′′	Urban	Traffic	CO, NO2, SO2, PM2.5, PM10, Benzene
	Libertini	N 40°21′07.110′′ E 18°10′33.952′′	Urban	Traffic	CO, NO2, PM2.5, PM10, Benzene
	S. M. Cerrate	N 40°27′35.0′′ E18°06′59.2′′	Rural	Background	CO, PM10, NO2, O3, SO2, PM2.5

¹ Lead, Nickel, Cadmium, Arsenic; ² Policiclic Aromatic Hydrocarbon; * as defined by respective Regional Agencies for the Environmental Protection.