The Air Quality Limit Values (Scotland) Regulations 2001

PART III PARTICULATE MATTER (PM₁₀)

	Averaging Period	Limit value	Margin of tolerance	Date by which limit value is to be met
1.  24-hour limit value for the protection of human health	24 hours	50μg/m3 PM10 not to be exceeded more than 35 times a calendar year	70μg/m3 on 19th July 2001, reducing on 1st January of each following year by 5μg/m3 to reach 50μg/m3 by 1st January 2005	1st January 2005
2.  Annual limit value for the protection of human health	Calendar year	40 μg/m3 PM10	46.4μg/m3 on 19th July 2001, reducing on 1st January of each following year by 1.6μg/m3 to reach 40μg/m3 by 1st January 2005	1st January 2005