Table 2.

Descriptive characteristics of air pollutants by city: EpiAir Study, Italy, 2001–2005.

Daily mean NO2 (μg/m3)							Daily mean PM10 (μg/m3)							Daily maximum O3 from 8-hr running means (μg/m3)a
City	No. monitors	Mean ± SD	50th percentile	90th percentile	No. monitors	Mean ± SD	50th percentile	90th percentile	No. monitors	Mean ± SD	50th percentile	90th percentile
Bologna		3		52 ± 18		50		75		1		43 ± 25b		36b		76b		2		91 ± 31		89		131
Cagliari		2		34 ± 16		33		54		3		32 ± 12		30		48		3		81 ± 19c		79c		108c
Florence		3		46 ± 19		44		68		4		38 ± 18		35		61		3		96 ± 24		96		125
Mestre–Venice		3		38 ± 14		36		58		2		48 ± 33b		39b		88b		3		91 ± 30		88		131
Milan		3		59 ± 23		57		88		5		52 ± 32		43		95		2		91 ± 34		89		138
Palermo		3		52 ± 16		51		74		3		35 ± 19		32		52		2		87 ± 18		86		111
Pisa		3		30 ± 11		29		45		3		34 ± 15		31		53		1		99 ± 21		99		127
Rome		3		62 ± 16		62		82		3		39 ± 16		37		59		2		105 ± 25		103		140
Taranto		4		26 ± 11		24		41		2		50 ± 21d		48d		81d		3		78 ± 21		78		104
Turin		3		66 ± 20		64		92		2		55 ± 34b		44b		102b		1		115 ± 39		113		170
aData for O3 from April–September. bData availability 2002–2005. cData availability 2003–2005. dData availability 2001–2004.