The Air Quality (Ozone) Regulations (Northern Ireland) 2003 No. 240

SCHEDULE 7 INFORMATION AND ALERT THRESHOLDS

PART I information and alert thresholds for ozone

	Parameter	Threshold
(a) The exceedance of the threshold is to be measured or predicted for three consecutive hours.
Information threshold	1 hour average	180μg/m3
Alert threshold	1 hour average (a)	240μg/m3