Year: 2025, Others

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

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

Updated: 2025-12-05 03:24 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).

For the completeness and quality of data is responsible the data supplier, not the CHMI.

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	Year ambient limit		Max. permissible number of exceedances		Unit
O₃	8 hours	120		25 in 3 years average		µg∙m -3
Sequence	Code	Name	Owner	Data supplier	Number of exceedances in year 2025	Maximum concentrations in year 2025	Completeness of data
1	TOROK	Ostrava-Radvanice OZO	ZÚ, SMOva	KHS-Ostrava	24	156	99.9
2	BBMAA	Brno-Arboretum	SMBrno	Statutory City of Brno	23	231	99.8
3	TOMHK	Ostrava-Mariánské Hory	ZÚ, SMOva	KHS-Ostrava	15	156	100.0
4	BBMLA	Brno-Lány	SMBrno	Statutory City of Brno	15	154	99.9
5	TOREK	Ostrava-Radvanice ZÚ	ZÚ, SMOva	KHS-Ostrava	15	151	99.9
6	MSMSA	Šumperk, ZŠ Vrchlického	MŠUM	ENVItech Bohemia s.r.o.	8	137	100.0
7	MPHRA	Hranice	MHRA	ENVItech Bohemia s.r.o.	2	123	99.2
8	ZZZSA	Zlín-ZŠ Kvítkova	MZLl	ENVItech Bohemia s.r.o.	1	127	92.3
Purpose: Protection of vegetation
Pollutant	Averaging interval	Year ambient limit on average over 5 years				Unit
O₃	1.5. - 31.7. (AOT40)	18 000				µg∙m -3 .h
The limit was not exceeded at the given the period