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.
| Upper assessment threshold | 28 ug/m3 | |
| Lower assessment threshold | 20 ug/m3 | |
| Average limit | 40 ug/m3 | |
| Tolerance margin | 20 % | |
| Objective | Protection of Human Health | |
| Average sampling duration | 1 year | |
| Qualifier | Passes through a size-selective inlet as defined in the reference method for the sampling and measurement of PM 10, EN 12341, with a 50 % efficiency cut- off at 10 µm aerodynamic diameter. | |
| Annex | XI (Section B),II (Section A3) | |
| 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 07 Already in force since 1 January 2005 09 'Year' in Averaging period referes to 'calendar year' 22 The required proportion of valid data for the Limit Value refers to the one hour values or (if not available) 24-hour values over the year 15 The requirements for the calculation of annual mean do not include losses of data due to the regular calibration or the normal maintenance of the instrumentation 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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