Ozone O3

O3 8h exceedance

Below are the latest dates of the exceedances of 8-hour target value (120 µg/m3)  and hourly information threshold (180 µg/m3) of O3, the concentration at the time of exceedance, and the total number of exceedances during the current year at each site. Learn more about Target Values

O3 Hourly exceedances

Below are the latest dates of the O3 hourly limit value (180 µg/m3) exceedances, the concentration at the time of exceedance, and the total number of exceedances during the current year at each site. Learn more about Limit Values

All data are preliminary and subject to change.