About Us

EU air quality limit values



Limit Values for the protection of human health


                                                                                   

Pollutant                  Averaging period                  Limit/Target value*                                Date by which value is to be met

Benzene                  Calendar year                      5 µg/m3 (1.54 ppb)                               1 January 2010

Carbon                     8-hour, rolling basis             10 mg/m3 (8.6 ppm)                              1 January 2005
monoxide (CO)        

Lead                        Calendar year                       0.5 µg/m3                                              1 January 2005 or, in specific
                                                                                                                                           cases, 1 January 2010

Nitrogen                   1-hour                                   200 µg/m3 (105 ppb), not be                1 January 2010
dioxide (NO2)                                                        exceeded > 18 times a
                                                                              calendar year                          

                               Calendar year                        40 µg/m3 (21 ppb)                                1 January 2010

Ozone (O3)             Maximum daily                       120 µg/m3 (60 ppb), not be                 Target value for 2010
                                8-hour mean                          exceeded > 25 days a calendar
                                Target Value                          year averaged over 3 years                       

Particulate               24-hour                                  50 µg/m3, not be exceeded                1 January 2005
matter less                                                             > 35 times a calendar
than                                                                        year
10 microns             
in diameter           Calendar year                            40 µg/m3                                            1 January 2005
(PM10),           
Gravimetric*       
                           
PM2.5                     Calendar year                          25 µg/m3                                            1 January 2015
Gravimetric*          Calendar year                          20 µg/m3                                            1 January 2020
                              Exposure reduction                 20% urban background reduction     between 2010 & 2020
 
Sulphur                    1-hour                                   350 µg/m3 (132ppb), not be                1 January 2005
dioxide (SO2)                                                        exceeded > 24 times a
                                                                              calendar year                                                    

                               24-hour                                   125 µg/m3 (47ppb), not be                  1 January 2005
                                                                               exceeded > 3 times a
                                                                               calendar year                    


Limit Values for the protection of vegetation (NOx) and ecosystems (SO2)


Oxides                     Calendar year                        30 µg/m3                                                19 July 2001
of nitrogen
(NOx)                     

Sulphur                    Calendar year & winter         20 µg/m3                                                 19 July 2001
dioxide                     (1 Oct to 31 Mar)
(SO2)                                                                                   

                  
*  Limit Value is legally binding on member states, Target Value is not
** Gravimetric refers to the method of measuring PM10