Detailed overview of ambient air pollution valuis from individual stations

Year: 2002
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
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 24 22 84 87 75 46 122 137 39 44 46 62 84 64 53 44 53 40 31 21 29 31 24 24 22 13 14 18 28 34 33 46.75 136.78 31.00
2 27 39 50 36 37 117 61 30 15 16 17 22 52 35 44 42 58 46 30 22 25 26 19 18 38 17 18 20 ~ ~ ~ 35.01 117.09 28.00
3 28 26 21 77 114 49 21 24 24 17 38 72 52 40 60 40 73 42 29 37 38 26 17 19 33 39 55 69 66 43 65 43.58 114.02 31.00
4 46 40 35 37 29 18 41 46 46 35 38 39 31 38 45 42 52 48 50 34 32 60 43 40 31 36 12 22 22 40 ~ 37.54 60.07 30.00
5 41 48 47 39 38 45 37 37 46 35 29 35 54 49 36 34 33 31 30 55 34 34 32 36 28 24 50 44 26 35 33 37.83 55.19 31.00
6 21 32 42 25 28 30 34 33 38 35 25 29 43 35 22 37 36 31 37 35 31 23 29 44 46 29 43 28 16 23 ~ 32.01 45.66 30.00
7 44 37 25 29 21 16 26 36 30 ~ 36 35 24 19 36 42 33 34 34 22 24 24 27 33 28 29 35 36 38 34 28 30.50 44.02 30.00
8 42 41 30 24 31 39 33 40 ~ ~ 23 25 18 29 32 36 39 51 61 47 33 51 50 38 43 33 36 39 53 43 30 37.60 61.16 29.00
9 34 34 40 53 44 38 39 58 53 36 49 45 44 20 27 38 37 38 68 75 42 41 45 37 43 ~ 29 29 47 ~ ~ 42.26 74.91 28.00
10 56 57 50 41 17 21 27 37 30 27 23 22 42 29 32 47 31 34 17 36 73 50 35 32 20 10 8.47 16 37 84 61 35.49 83.81 31.00
11 50 25 23 60 33 49 88 40 18 28 53 36 57 107 212 158 25 146 67 79 54 77 29 65 168 113 91 48 64 38 ~ 70.05 211.78 30.00
12 36 55 69 94 55 41 27 27 51 62 77 46 42 41 41 44 104 44 92 70 213 75 44 27 23 24 49 49 23 40 28 55.10 213.16 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. 40 38 8 4 0 0 0 0 90 50 12 4 0 0 0 0 137
REL. 44.4 42.2 8.8 4.4 0.0 0.0 0.0 0.0 100.0 55.6 13.3 4.4 0.0 0.0 0.0 0.08.1
ID 44 42 8 8 0 0 0 0 104
ABS. 34 57 0 0 0 0 0 0 91 57 0 0 0 0 0 0 60
REL. 37.3 62.6 0.0 0.0 0.0 0.0 0.0 0.0 100.0 62.6 0.0 0.0 0.0 0.0 0.0 0.0 22.4
ID 37 62 0 0 0 0 0 0 100
ABS. 31 54 2 0 0 0 0 0 87 56 2 0 0 0 0 0 75
REL. 35.6 62.0 2.2 0.0 0.0 0.0 0.0 0.0100.0 64.4 2.3 0.0 0.0 0.0 0.0 0.0 20.9
ID 35 62 2 0 0 0 0 0 100
ABS. 30 41 13 4 2 2 0 0 92 62 21 8 4 2 0 0 213
REL 32.6 44.5 14.1 4.3 2.1 2.1 0.0 0.0100.0 67.4 22.8 8.7 4.3 2.2 0.0 0.021.12
ID 32 44 14 8 10 54 0 0 165
Year
ABS. 135 190 23 8 2 2 0 0 360 225 35 12 4 2 0 0 213
REL. 37.5 52.7 6.3 2.2 0.5 0.5 0.0 0.0100.0 62.5 9.7 3.3 1.1 0.6 0.0 0.021.12
ID 37 52 6 4 2 13 0 0 117

Note:

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