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

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

PART I SULPHUR DIOXIDE

Limit values for sulphur dioxide

1.1  

	Averaging period	Limit value	Margin of tolerance (a)	Date by which limit value is to be met
1.  Hourly limit value for the protection of human health	1 hour	350 μg/m3, not to be exceeded more than 24 times a calendar year	60 μg/m3, reducing to 30μg/m3 on 1st January 2004 and to 0 μg/m3 on 1st January 2005	1st January 2005
2.  Daily limit value for the protection of human health	24 hours	125 μg/m3, not to be exceeded more than 3 times a calendar year	None	1st January 2005