Tab. I.1 Limit values (LV) for the protection of health according to the Act No. 201/2012 Coll.

Pollutant	Averaging interval	Assessment threshold [µg.m-3]		Limit value [µg.m-3] LV
		Lower LAT	Upper UAT
SO2	1 hour	—	—	350  max. 24x/year
	24 hours	50 max. 3x/year	75 max. 3x/year	125 max. 3x/year
NO2	1 hour	100 max. 18x/year	140 max. 18x/year	200 max. 18x/year
	calendar year	26	32	40
CO	max. daily 8-h running average	5 000	7 000	10 000
benzene	calendar year	2	3.5	5
PM10	4 hours	25 max. 35x/year	35 max. 35x/year	50 max. 35x/year
	calendar year	20	28	40
PM2,5	calendar year	12	17	25
Pb	calendar year	0.25	0.35	0.5
As	calendar year	0.0024	0.0036	0.006
Cd	calendar year	0.002	0.003	0.005
Ni	calendar year	0.010	0.014	0.020
benzo[a]pyrene	calendar year	0.0004	0.0006	0.001
O3	max. daily 8-h running average	—	—	120  25x in 3-year average

Long-term objectives

Pollutant	Application	Averaging interval	Long-term objective [µg.m-3]
O3	for the protection of human health	max. daily 8-h running average	120