Directive 2008/50/EC, or the Ambient Air Quality Directive, is an EU directive which limits sulphur dioxide, NO2 and other oxides of nitrogen, particulate matter (PM10, PM2.5), lead, benzene and carbon monoxide concentrations from 2010.
Hourly average concentrations of NO2 are limited to 200 μg/m3 and yearly average concentrations to 40 μg/m3.
[1] As of 2018[update] several EU member states are being sued for violating the limits: France, Spain, Italy, Hungary, Romania, Slovakia, the Czech Republic, the United Kingdom and Germany.
[1] On 15 February 2018, five member countries were urged to safeguard public health.
[3] On 22 February 2018, Poland was found guilty of violating the emission limits in the Radom, Pruszków-Żyrardów and Kędzierzyn-Koźle and Ostrów-Kępno districts during the eight-year period from 2007 to 2015.