Year: 2025, CHMI

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

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

Updated: 2025-04-04 04:24 CEST

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∙m -3
Sequence	Code	Name	Owner	Data supplier	Number of exceedances in year 2025	Maximum concentrations in year 2025	Completeness of data
1	TCERA	Červená hora	ČHMÚ	CHMI-brand Ostrava AIM	3	131	100.0
2	ZSNVA	Štítná n.Vláří	ČHMÚ	CHMI-Brno AIM	2	133	100.0
3	LSOUA	Souš	ČHMÚ	ČHMÚ-pobočka Ústí n/Labem-AIM	2	130	100.0
4	MJESA	Jeseník-lázně	ČHMÚ	CHMI-brand Ostrava AIM	2	127	100.0
5	TBKRA	Bílý Kříž	ČHMÚ	CHMI-brand Ostrava AIM	1	127	100.0
6	HPLOA	Polom	ČHMÚ	ČHMÚ - pob.Hradec Králové	1	126	100.0
7	BMISA	Mikulov-Sedlec	ČHMÚ	CHMI-Brno AIM	1	123	100.0
8	ESVRA	Svratouch	ČHMÚ	ČHMÚ - pob.Hradec Králové	1	123	100.0
9	TTROA	Třinec-Kosmos	ČHMÚ	CHMI-brand Ostrava AIM	1	123	100.0
10	HHKOK	Hradec Králové-observatoř	ČHMÚ	ČHMÚ - pob.Hradec Králové	1	123	100.0
11	HKRYA	Krkonoše-Rýchory	ČHMÚ	ČHMÚ - pob.Hradec Králové	1	122	100.0
12	ZZLNA	Zlín	ČHMÚ	CHMI-Brno AIM	1	121	100.0
Purpose: Protection of vegetation
Pollutant	Averaging interval	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