Pollutant	Status	Max. values	Station
Sulphur dioxide (SO2)		-	-
Nitrogen oxides (NO2)		-	-
Ozone (O3)		-	-
Particulate matter (PM10)		-	-

Legend:

• no pollution episode
• ! Information threshold
• ! Alert threshold

Information threshold for some substance in air

No.	Substance	Averaging time	Information threshold for some substance in air  μg/m3
1.	Ozone (O3)	1 hour	180
2.	Dust (PM10)	24 hours	100

Alert threshold for some substance in air

No.	Substance	Averaging time	Alert threshold for some substance in air  μg/m3
1.	Sulphur dioxide (SO2)	1 hour	500
2.	Nitrogen oxides (NO2)	1 hour	400
3.	Ozone (O3)	1 hour	240
4.	Dust (PM10)	24 hours	150