Detailed overview of ambient air pollution valuis from individual stations

Year: 2002
Pollutant:NO2-nitrogen dioxide
Station: 774 - Pha4-Libus
Code:CZ04CMLIB
Institution:Czech Hydrometeorological Institute
Region:Prague
District:Praha 4
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 20 20 54 54 54 38 57 57 28 30 32 49 59 42 28 32 33 30 26 17 22 22 15 16 18 9 11 13 21 22 25 30.77 58.92 31.00
2 19 29 34 24 22 44 34 23 10 12 12 17 40 28 36 36 39 31 23 18 20 22 16 15 25 12 12 14 ~ ~ ~ 23.77 43.87 28.00
3 20 22 17 43 68 35 17 18 20 12 24 49 38 34 40 33 42 31 22 29 28 22 15 17 30 35 45 49 52 36 58 32.27 67.70 31.00
4 38 30 29 29 26 16 30 37 33 29 29 29 25 28 34 31 37 32 38 30 26 47 35 31 20 27 8.79 15 15 31 ~ 28.86 46.96 30.00
5 32 35 30 25 30 35 27 30 36 23 19 25 40 35 26 21 26 24 22 38 23 23 24 22 21 16 32 27 18 26 25 27.07 39.79 31.00
6 16 24 29 18 21 20 23 23 25 24 15 17 31 21 13 23 24 20 26 23 21 15 21 31 33 20 34 20 11 15 ~ 21.85 34.45 30.00
7 33 20 14 21 17 13 18 24 24 ~ 24 27 19 15 27 32 22 20 26 17 19 19 20 23 19 21 28 27 29 26 21 22.09 33.35 30.00
8 29 30 25 19 21 31 27 30 ~ ~ 18 19 15 20 24 27 29 29 33 30 20 30 34 26 32 24 24 25 31 32 24 26.17 34.17 29.00
9 24 24 24 30 26 26 29 38 34 24 30 28 31 15 21 26 26 26 41 40 29 28 33 30 31 ~ 20 19 25 ~ ~ 27.77 41.25 28.00
10 31 30 29 23 11 14 21 27 20 22 21 19 24 16 18 20 18 17 13 25 31 19 26 19 10 7.00 5.78 14 24 46 30 20.93 45.75 31.00
11 25 20 19 34 29 31 40 25 14 20 31 20 26 38 45 37 17 47 31 43 26 35 20 33 46 37 41 21 31 25 ~ 30.17 46.76 30.00
12 21 29 33 32 32 23 23 22 37 40 53 32 28 33 30 26 41 37 47 38 65 50 35 23 18 18 36 32 17 31 24 32.47 64.75 31.00

Quarterly and annual absolute and relative frequency of average daily concentrations
partial and total air pollution indexes according to classes of IHd multiples

Quarter

concentration classes in IHd multiples

total ind.

part of it in IHd multiples

max.
date

<=1/3 <=2/3 <=1.0 <=1.5 <=2.0 <=3.0 <=4.0 > 1/32/31.01.52.0 3.04.0

concentration classes in measurement units

part of above IHd multiples in meas. units

0- 33 34- 67 68- 100 101- 150 151- 200 201- 300 301- 400 over 400 33 67 100 150 200 300 400
ABS. 60 29 1 0 0 0 0 0 90 30 1 0 0 0 0 0 68
REL. 66.6 32.2 1.1 0.0 0.0 0.0 0.0 0.0 100.0 33.3 1.1 0.0 0.0 0.0 0.0 0.05.3
ID 66 32 1 0 0 0 0 0 100
ABS. 76 15 0 0 0 0 0 0 91 15 0 0 0 0 0 0 47
REL. 83.5 16.4 0.0 0.0 0.0 0.0 0.0 0.0 100.0 16.5 0.0 0.0 0.0 0.0 0.0 0.0 22.4
ID 83 16 0 0 0 0 0 0 100
ABS. 81 6 0 0 0 0 0 0 87 6 0 0 0 0 0 0 41
REL. 93.1 6.8 0.0 0.0 0.0 0.0 0.0 0.0100.0 6.9 0.0 0.0 0.0 0.0 0.0 0.0 19.9
ID 93 6 0 0 0 0 0 0 100
ABS. 69 23 0 0 0 0 0 0 92 23 0 0 0 0 0 0 65
REL 75.0 25.0 0.0 0.0 0.0 0.0 0.0 0.0100.0 25.0 0.0 0.0 0.0 0.0 0.0 0.021.12
ID 75 25 0 0 0 0 0 0 100
Year
ABS. 286 73 1 0 0 0 0 0 360 74 1 0 0 0 0 0 68
REL. 79.4 20.2 0.2 0.0 0.0 0.0 0.0 0.0100.0 20.6 0.3 0.0 0.0 0.0 0.0 0.0 5.3
ID 79 20 0 0 0 0 0 100

Note:

1 frequency < 60 per quarter, or < 240 per annum
2 frequency < 30 per quarter, or < 120 per annum