air-ann-dir-2008-50

Annexes II VII XI XII XIII XIV - Assessment Thresholds & Limit Values

This list contains the Limit, Critical, Target and Long-term Values on ambient air for protection of human health and vegetation. It also contains the Alert, Information and Upper and Lower Assessment thresholds for sulphur dioxide, nitrogen dioxide, benzene, carbon monoxide, lead, PM2.5, PM10 and ozone.

Sulphur dioxide

EC / List no: 231-195-2 CAS no: 7446-09-5
Alert Threshold
500 ug/m3
Average limit
350 ug/m3
Tolerance margin
43 %
Objective
Protection of Human Health
Average sampling duration
1 hour
Annex
XI (Section B),XII (Section A)
Notes
01 Without prejudice to Annex I, the criteria for 'Required proportion of valid data' shall be used for checking validity when aggregating data and calculating statistical parameters

02 Limit value not to be exceeded more than 24 times a calendar year

07 Already in force since 1 January 2005

29 Alert thresholds: To be measured over three consecutive hours at locations representative of air quality over at least 100 km2 or an entire zone or agglomeration, whichever is the smaller

30 Average Limit is the Limit Value, a level fixed with the aim of avoiding, preventing or reducing harmful effects on human health and/or the environment and not to be exceeded once attained


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