Polluants | Information threshold | Alert threshold |
Sulphur dioxide (SO2) | 350 µg/m3 of sulphur dioxide average measured in an hour | 550 µg/m3 of sulphur dioxide average measured in 3 consecutive hours |
Nitrogen dioxide (NO2) | 250 µg/m3 of nitrogen dioxide average measured in an hour | 400 µg/m3 of nitrogen dioxide average measured in an hour |
Particulate matter (PM10) | 150 µg/m3 of PM10 average measured in 24 hours | 200 µg/m3 de PM10 average measured in a 24 hours |
Ozone (O3) | 200 g/m3 average ozone measured in an hour | 260 µg/m3 average ozone measured in an hour |