Air pollution limit values

according to the Clean Air Act No. 201/2012 Coll. as amended and

regulation No. 330/2012 Coll. as amended
 

1. Air pollution limit values for the protection of health

PollutantAveraging 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
PM10 24 hours 25
max. 35x/year
35
max. 35x/year
50
max. 35x/year
calendar year 20 28 40
PM2.5 calendar year 12 17 20 (since 2020)*
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

*Air pollution limit value for PM2,5 applied since 2020, the limit value of 25 µg.m-3 was applied to 2019

Note:
The maximum daily eight-hour mean concentration shall be selected by examining eight-hour running averages, calculated from hourly data and updated each hour. Each eight-hour average so calculated shall be assigned to the day on which it ends. i.e. the first calculation period for any one day will be the period from 17:00 on the previous day to 01:00 on that day; the last calculation period for any one day will be the period from 16:00 to 24:00 on the day.

 

2. Air pollution limit values for the protection of ecosystems

Pollutant Averaging interval Assessment threshold
[µg.m-3]
Limit value
[µg.m-3]
LV
Lower
LAT
Upper
UAT
SO2 year and winter period (1.10.-31.3.) 8 12 20
NOx calendar year 19.5 24 30

 

3. Air pollution limit values  for the protection of health - total content in the PM10 fraction

Pollutant Averaging interval Assessment threshold [ng.m-3] Limit value
[ng.m-3]
LV
Lower
LAT
Upper
UAT
As calendar year 2.4 3.6 6
Cd calendar year 2 3 5
Ni calendar year 10 14 20
Benzo(a)pyrene calendar year 0.4 0.6 1


4. Air pollution limit values for ground-level ozone

  Averaging interval Limit value
O3 max. daily 8-h running average 120 µg.m-3
max. 25x
average for 3 years
AOT40 calculated from 1h values between May and July 18 000 µg.m-3.h
average for 5 years

Note:
The maximum daily eight-hour mean concentration shall be selected by examining eight-hour running averages, calculated from hourly data and updated each hour. Each eight -hour average so calculated shall be assigned to the day on which it ends. i.e. the first calculation period for any one day will be the period from 17:00 on the previous day to 01:00 on that day; the last calculation period for any one day will be the period from 16:00 to 24:00 on the day.

AOT40 (expressed in (μg/m3) ∙ hours) means the sum of the difference between hourly concentrations greater than 80 μg/m3 (= 40 parts per billion) and 80 μg/m3 over a given period using only the one-hour values measured between 8.00 and 20.00 Central European Time (CET) each day.

 

4. Air pollution limit values for ground-level ozone

  Averaging interval Limit value
O3 max. daily 8-h running average 120 µg.m-3
AOT40 AOT40, calculated from 1h values between May and July 6 000 µg.m-3.h

 

Creative Commons License - non commercial