Detailed overview of ambient air pollution valuis from individual stations

Year: 2000
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 774 - Pha4-Libus
Code:CZ04CMLIB
Institution:Czech Hydrometeorological Institute
Region:Hlavni mesto Praha
District:Praha 4
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 25 29 25 24 32 66 49 29 ~ 61 42 41 21 31 51 28 24 16 21 26 18 24 46 52 52 48 51 39 13 13 16 33.77 65.91 30.00
2 29 28 22 24 19 21 20 15 13 20 39 22 15 20 27 24 29 23 25 25 44 39 53 28 24 37 20 25 21 ~ ~ 25.95 52.85 29.00
3 29 16 16 13 12 24 23 21 15 25 14 36 30 26 15 25 28 25 29 46 35 77 75 127 ~ 24 27 43 22 37 28 32.14 126.50 30.00
4 25 32 39 62 34 24 22 28 21 34 43 26 19 49 32 34 29 58 36 53 ~ ~ 17 20 41 48 ~ 21 23 29 ~ 33.26 62.03 27.00
5 30 30 35 37 29 23 19 27 38 44 50 18 23 31 35 ~ ~ 26 17 11 17 26 ~ ~ ~ ~ ~ ~ ~ ~ ~ 28.36 50.45 20.00
6 32 ~ ~ ~ ~ 29 24 32 25 ~ ~ 39 ~ 30 20 14 14 ~ ~ 22 33 22 25 15 17 17 19 25 24 22 ~ 23.80 39.22 21.00
7 20 28 21 19 14 26 30 16 12 16 21 27 17 19 14 18 21 28 18 20 22 20 27 36 23 24 21 19 13 18 27 21.24 36.14 31.00
8 19 17 19 20 24 30 28 27 34 26 28 27 38 30 32 25 26 25 24 38 21 34 42 35 28 13 30 40 43 39 40 29.12 43.38 31.00
9 30 12 17 21 35 23 30 25 17 41 66 38 27 36 28 15 30 30 36 27 32 53 24 39 34 36 72 27 25 17 ~ 31.45 71.76 30.00
10 20 39 59 74 56 34 28 26 26 19 43 67 131 78 29 47 67 53 88 38 34 60 33 31 22 26 24 26 18 29 39 44.03 130.78 31.00
11 22 31 57 25 43 20 50 33 33 28 29 32 77 64 51 69 57 23 48 61 52 58 126 111 46 24 29 30 50 37 ~ 47.21 126.48 30.00
12 37 33 33 63 33 29 37 96 88 39 27 24 19 18 22 17 32 53 107 153 46 62 32 40 51 73 34 43 78 35 31 47.88 152.86 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. 64 22 2 1 0 0 0 0 89 25 3 1 0 0 0 0 127
REL. 71.9 24.7 2.2 1.1 0.0 0.0 0.0 0.0 100.0 28.1 3.4 1.1 0.0 0.0 0.0 0.024.3
ID 71 24 2 2 0 0 0 0 101
ABS. 49 19 0 0 0 0 0 0 68 19 0 0 0 0 0 0 62
REL. 72.0 27.9 0.0 0.0 0.0 0.0 0.0 0.0 100.0 27.9 0.0 0.0 0.0 0.0 0.0 0.0 4.4
ID 72 27 0 0 0 0 0 0 100
ABS. 70 21 1 0 0 0 0 0 92 22 1 0 0 0 0 0 72
REL. 76.0 22.8 1.0 0.0 0.0 0.0 0.0 0.0100.0 23.9 1.1 0.0 0.0 0.0 0.0 0.0 27.9
ID 76 22 1 0 0 0 0 0 100
ABS. 39 38 10 4 1 0 0 0 92 53 15 5 1 0 0 0 153
REL 42.3 41.3 10.8 4.3 1.0 0.0 0.0 0.0100.0 57.6 16.3 5.4 1.1 0.0 0.0 0.020.12
ID 42 41 10 8 5 0 0 0 108
Year
ABS. 222 100 13 5 1 0 0 0 341 119 19 6 1 0 0 0 153
REL. 65.1 29.3 3.8 1.4 0.2 0.0 0.0 0.0100.0 34.9 5.6 1.8 0.3 0.0 0.0 0.020.12
ID 65 29 3 2 1 0 0 0 102

Note:

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