Under the National Emission Ceilings (NEC) Directive, EU Member States have individual air pollutant emission limits, or 'ceilings', for sulphur dioxide (SO2), nitrogen oxides (NOx), ammonia (NH3) and non-methane volatile organic compounds (NMVOC). As of 2010, Member States should not have exceeded their emission ceilings, but the EEA report 'NEC Directive status report 2014', which includes preliminary data for 2013 and summarises data for 2010-12, confirms that a number of countries did so for these years.