WHO (WHOA+B, 1995) has recommended the following guidelines for NO2, i.e. 200

Tg/m3 as 1-hour average and 40 Tg/m3 as annual average. WHO has not considered

recommendations for alert thresholds.

The EEA’s Topic Centre for Air Quality under has collected air quality data for

Europe (Air Quality in Major European Cities, R.J.C.F. Sluyter (Ed.), 1995). The

report includes estimates and classification of population exposure and exceedances of

WHO-AQGs for SO2, O3 and PM, but not for NO2. A very rough estimate of the NO2

level has been made on the basis of data from Dutch cities. Based on this estimates of

exposure above WHO-AQGs have been made.

 

 

 

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