Legend:
Air Quality Index Value
EU Standards are
exceeded by one
pollutant or more
  > 1
EU Standards are
fulfilled on average
  1
The situation is better
than the norms requirements on average
  < 1
Tours Yearly Air Quality Index

Year NO2 Year average PM10 year average PM10 exceedences daily average O3, # of days with 8-hour average >=120µg/m3 SO2 year average Benzene year average City Index
2006 0.88 0.43 0 - - - 0.43
2007 0.85 0.63 0.49 - - - 0.65
2008 0.83 0.6 0.23 - - - 0.55
2009 1.13 0.68 0.6 - - 0.2 0.8
2010 1.13 0.63 0.31 - - 0.3 0.69
2011 1.4 0.68 0.63 - - 0.24 0.9
2012 1.08 0.63 0.69 - - 0.3 0.8

Tours Roadside Annual index chart



Year NO2 Year average PM10 year average PM10 exceedences daily average O3, # of days with 8-hour average >=120µg/m3 SO2 year average Benzene year average City Index
2006 0.5 0.38 0.03 1.6 0.05 0.2 0.63
2007 0.53 0.6 0.54 0.64 0.05 0 0.58
2008 0.48 0.6 0.23 0.44 0.05 0 0.44
2009 0.48 0.6 0.37 0.36 0.1 - 0.45
2010 0.48 0.56 0.23 0.88 0.1 - 0.54
2011 0.45 0.6 0.4 0.6 - - 0.51
2012 0.45 0.55 0.37 0.24 - - 0.4

Tours Background Annual index chart

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