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

EU. Limit, Critical, Target, Long-term Values; Alert, Info. and Assessment Thresholds - Anxes II A; VII B&C; XI B; XII A&B; XIII; XIV C, D&E, Dir 2008/50/EC, amended by Dir 2015/1480/EC, 29 Aug 2015

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.


EC / List no: 233-069-2 CAS no: 10028-15-6
Long-term objective
120 µg/m3
Protection of Human Health
Target value
120 µg/m3
Average sampling duration
8 h
VII (Section B),VII (Section C)
10 '8 h' in Averaging period for Limit and Target values refers to 'maximum daily 8 hour mean'. The concentration will be selected by examining 8 hour running averages, calculated from hourly data and updated each hour. Each 8 hour average so calculated will be assigned to the day on which it ends i.e. the first period for any one day will be the period from 17:00 on the previous day to 1:00 on that day; the last calculation period for any one day will be the period from 16:00 to 24:00 on that day

13 The required proportion of valid data refers to the percentage of the hourly running eight hour averages

16 Compliance with target values will be assessed as of 1.1.2010. That is, 2010 will be the first year the data for which is used in calculating compliance over the following three or five years, as appropriate

17 Target value not to be exceeded on more than 25 days per calendar year averaged over three years

18 If the three or five year averages cannot be determined on the basis of a full and consecutive set of annual data, the minimum annual data required for checking compliance with the target values will be as follows: (a) for the target value for the protection of human health: valid data for one year, (b) for the target value for the protection of vegetation: valid data for three years.

19 '8 h' in Averaging period for Long-term objectives refers to 'maximum daily eight hour mean within a calendar year'

20 The date by which the longterm objective should be met is not defined