Table 1: Photochemical pollution indicators , , and for summer seasons.

WhenWhere Reference

1997–2003K-Puszta, Hungary6.15.45.7 [13]
1997–2003Krvavec, Slovenia1.82.52.1
1997–2003Illmitz, Austria4.75.14.9
1997–2003Montelibretti, Italy97220146.1
2002Osijek, Croatia28.430.529.4This work
2007Osijek, Croatia 24.7100.449.8
2012Osijek, Croatia28.1110.955.8