Limit values (LV) for the protection of health

Pollutant Averaging interval Assessment threshold [μg.m-3] Limit value
[μg.m-3]
LV
Date for achieving LV
Upper
UAT
Lower
LAT
SO2  1 hour      350
max. 24x/year
 
 24 hours  50
max. 3x/year
 75
max. 3x/year
 125
max. 3x/year
 
PM10  24 hours  20
max. 7/year
 30
max. 7x/year
 50
max. 35x/year
 
 calendar year  10  14  40  
NO2  1 hour  100
max. 18x/year
 140
 max. 18x/year
 200
max. 18x/year
 calendar year  26  32  40
Pb  calendar year  0.25  0.35  0.5  
CO  max. daily 8-h running average  5 000  7 000  10 000  
Benzene  calendar year  2  3.5  5

The Government Order No. 42/2011 Coll., adopted on 2.2.2011, amending the Government Order No. 597/2006 Coll., on air quality monitoring and assessment, states in its Art. II. – Interim Provisions – that the limit value for PM2,5 must be met by 31.12.2014 and in the meantime it is regarded as the target value.