Paragraph 2.1 Limit values for nitrogen dioxide and oxides of nitrogen

	Averaging Period	Limit value	Margin of tolerance	Date by which limit value is to be met
1 Hourly limit value for the protection of human health	1 hour	200μg/m³ NO₂not to be exceeded more than 18 times a calendar year	50% on 19 July 1999, reducing on 1 January 2001 and every 12 months thereafter by equal annual percentages to reach 0% by 1 January 2010	1 January 2010
2 Annual limit value for the protection of human health	Calendar year	40 μg/m³NO₂	50% on 19 July 1999 reducing on 1 January 2001 and every 12 months thereafter by equal annual percentages to reach 0% by 1 January 2010	1 January 2010
3 Annual limit value for the protection of vegetation	Calendar year	30 μg/m³ NO_x	None	19 July 2001