The Air Quality Limit Values (Scotland) Regulations 2003 No. 428

SCHEDULE 1 LIMIT VALUES, MARGINS OF TOLERANCE, INFORMATION AND ALERT THRESHOLDS

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	50 μg/m3 PM10, not to be exceeded more than 35 times a calendar year	10 μg/m3 , reducing on 1st January 2004 to 5 μg/m3 and on 1st January 2005 to 0 μg/m3.	1st January 2005
2.  Annual limit value for the protection of human health	Calendar year	40 μ g/m3 PM10	3.2 μg/m3, reducing on 1st January 2004 to 1.6μg/m3 and on 1st January 2005 to 0 μg/m3	1st January 2005