Detailed overview of ambient air pollution valuis from individual stations

Year: 1998
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 774 - Pha4-Libus
Code:CZ04CMLIB
Institution:CHMI
Region:Hlavni mesto Praha
District:Praha 4
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 40 26 11 10 14 19 21 20 25 44 136 37 49 86 43 33 20 26 27 29 26 37 31 42 49 137 207 65 79 43 39 47.49 207.14 31.00
2 44 47 42 81 72 61 31 23 33 47 45 37 31 27 24 21 34 42 47 63 39 67 57 50 88 55 27 18 ~ ~ ~ 44.87 88.13 28.00
3 18 22 20 18 13 17 13 14 25 40 45 30 20 17 39 47 31 27 20 25 20 26 29 45 54 41 37 52 45 47 49 30.40 53.68 31.00
4 52 37 22 16 24 28 24 28 47 24 35 20 34 32 28 54 32 31 29 35 48 47 29 ~ 22 19 23 28 24 25 ~ 30.91 53.93 29.00
5 18 16 25 19 23 26 33 19 19 36 38 49 23 22 25 18 28 28 25 31 27 16 18 20 24 27 28 20 17 16 25 24.59 49.29 31.00
6 17 11 28 24 19 20 18 28 23 17 30 16 18 26 21 19 22 25 24 19 26 27 22 31 31 26 18 30 26 23 ~ 22.84 30.86 30.00
7 31 25 20 17 21 32 32 16 20 26 30 30 33 30 24 24 15 33 21 26 35 41 25 28 23 26 23 21 24 35 27 26.25 40.56 31.00
8 13 14 34 28 25 34 31 22 27 32 29 29 41 30 21 32 29 33 34 27 59 42 34 40 27 32 23 25 20 24 38 29.97 59.44 31.00
9 53 34 30 22 26 29 33 28 31 29 42 34 32 16 24 43 54 36 45 46 46 60 58 70 68 76 53 35 57 30 ~ 41.23 75.84 30.00
10 23 30 30 18 32 32 39 67 59 32 23 28 23 27 43 53 ~ 35 59 30 29 33 27 27 23 25 22 ~ 24 20 16 31.95 67.27 29.00
11 14 27 18 24 35 30 67 39 48 53 30 42 40 29 32 84 30 36 73 33 34 57 114 98 49 76 71 110 40 62 ~ 49.78 113.57 30.00
12 27 61 57 53 29 19 24 34 76 117 129 81 20 41 43 33 44 67 23 32 38 51 58 32 14 13 15 34 83 30 20 45.08 128.67 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. 43 38 6 2 0 1 0 0 90 47 9 3 1 1 0 0 207
REL. 47.7 42.2 6.6 2.2 0.0 1.1 0.0 0.0 100.0 52.2 10.0 3.3 1.1 1.1 0.0 0.027.1
ID 47 42 6 4 0 27 0 0 128
ABS. 77 13 0 0 0 0 0 0 90 13 0 0 0 0 0 0 54
REL. 85.5 14.4 0.0 0.0 0.0 0.0 0.0 0.0 100.0 14.4 0.0 0.0 0.0 0.0 0.0 0.0 16.4
ID 85 14 0 0 0 0 0 0 100
ABS. 60 29 3 0 0 0 0 0 92 32 3 0 0 0 0 0 76
REL. 65.2 31.5 3.2 0.0 0.0 0.0 0.0 0.0100.0 34.8 3.3 0.0 0.0 0.0 0.0 0.0 26.9
ID 65 31 3 0 0 0 0 0 100
ABS. 45 30 11 4 0 0 0 0 90 45 15 4 0 0 0 0 129
REL 50.0 33.3 12.2 4.4 0.0 0.0 0.0 0.0100.0 50.0 16.7 4.4 0.0 0.0 0.0 0.011.12
ID 50 33 12 8 0 0 0 0 104
Year
ABS. 225 110 20 6 0 1 0 0 362 137 27 7 1 1 0 0 207
REL. 62.1 30.3 5.5 1.6 0.0 0.2 0.0 0.0100.0 37.8 7.5 1.9 0.3 0.3 0.0 0.0 27.1
ID 62 30 5 3 0 6 0 0 108

Note:

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