Air quality map thresholds

Classification of the air quality levels for the EEA air quality reports and viewers (mandatory pollutants).

Particulate matter (PM10)

The reference levels

Annual statistics

• 90.41 percentile corresponding with the 36th highest  daily value if 100% data is available [µg/m3]:

• Nr of days with exceedance (with PM10 > 50 µg/m3):

• Annual mean [µg/m3]:

Short term statistics (UNDER DISCUSSION)

• Daily mean or 24h run for UTD [µg/m3]:

Particulate matter (PM2.5)

The reference levels

Annual statistics

• Annual mean [µg/m3]:

<= 10 (WHO [2] , reference level for the annual mean)
> 10 <= 20 (EU [1] , limit value for human health, annual mean – to be met by 1st Jan 2020)
> 20 <= 25 (EU [1] , target value for human health annual mean – to be met by 1st Jan 2015)
> 25 <= 30 (nonattainment)
> 30 (nonattainment)

Short term statistics (UNDER DISCUSSION)

• Daily mean or 24h run for UTD [µg/m3]:

Ozone (O3)

The reference levels

Annual statistics

• 93.15 percentile corresponding with the 26th highest daily value (daily maximum 8-hour mean) if 100% data is available [µg/m3]:

• Nr of days with exceedance (with O3 > 120 µg/m3):

• AOT40 – protection of vegetation & protection of forests, both 1 year and 5 years averages [µg*h/m3]:

• SOMO35 (year, corrected) [µg*d/m3]:

Short term statistics (UNDER DISCUSSION)

• 1h or 1h daily max for UTD [µg/m3]:

Nitrogen dioxide (NO2)

The reference levels

Annual statistics

• 99.78 percentile corresponding with the 19th highest hourly value if 100% data is available [µg/m3]:

• Nr of hours with exceedance (with NO2 > 200 µg/m3):

• Annual mean  [µg/m3]:

Short term statistics (UNDER DISCUSSION)

• 1 h for UTD [µg/m3]:

Sulphur dioxide (SO2)

The reference levels

Annual statistics

• 99.73 percentile corresponding with the 25th highest hourly value if 100% data is available [µg/m3]:

• Nr of hours with exceedance (with SO2 > 350 µg/m3):

• 99.18 percentile corresponding with the 4th highest daily value if 100% data is available [µg/m3]:

• Nr of days with exceedance (with SO2 > 125 µg/m3):

• Annual mean [µg/m3]:

Short term statistics (UNDER DISCUSSION)

• 1h or 1h daily max for UTD [µg/m3]:

Carbon monoxide (CO)

The reference levels

Annual statistics

• The highest daily maximum of running 8-hour mean [mg/m3]:

• Annual mean based on daily maximum 8-hour mean [mg/m3]:

Short term statistics (UNDER DISCUSSION)

• Daily maximum 8-hour mean and 8h run for UTD [mg/m3]:

Benzene (C6H6)

The reference levels

Annual statistics

• Annual mean [µg/m3]:

Heavy metals (As, Cd, Ni and Pb)

The reference levels

Annual statistics

• Annual mean [ng/m3], As:

• Annual mean [ng/m3], Cd:

• Annual mean [ng/m3], Ni:

• Annual mean [ng/m3], Pb:

Benzo(a)pyrene (BaP)

The reference levels

Annual statistics

• Annual mean [ng/m3]: