Information about air quality in the Czech Republic

Year: 2020, CHMI

Overview of the target ambient limit values
exceedances of O3 and AOT40

calculated of both operational data (yet unverified) and verified data

Updated: 2020-02-26 04:29 CET

The values are from all active stations regardless of whether the number of valid measurement meets the criteria for calculating the aggregated data (annual average).

Completeness of data – completeness of measured data supplied to AQIS database to the day of table update (in percentage).

Purpose: Health protection
Pollutant Averaging interval Ambient limit Max. permissible number of exceedances Unit
O3 8 hours 120 25 in 3 years average µg/m3
The limit was not exceeded at the given the period
Purpose: Protection of vegetation
Pollutant Averaging interval Ambient limit on average over 5 years Unit
O3 1.5. - 31.7. (AOT40) 18000 µg/m3.h
The limit was not exceeded at the given the period