Detailed overview of ambient air pollution valuis from individual stations

Year: 1998
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 777 - Pha6-Veleslavin
Code:CZ06CMVEL
Institution:CHMI
Region:Hlavni mesto Praha
District:Praha 6
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 59 41 13 16 19 19 33 21 22 120 112 96 47 100 82 54 17 54 52 24 15 30 26 46 44 160 141 67 95 52 40 55.41 159.53 31.00
2 78 72 42 192 126 114 51 28 50 63 57 38 29 24 24 26 22 63 63 125 88 79 56 46 64 56 30 15 ~ ~ ~ 61.52 192.48 28.00
3 17 24 25 24 13 25 13 10 15 48 62 34 17 10 38 29 19 20 15 12 11 35 51 27 66 76 54 57 57 84 132 35.97 132.21 31.00
4 87 42 39 18 31 30 33 44 73 46 43 12 30 35 53 66 47 18 20 94 69 59 71 41 42 43 38 54 44 42 ~ 45.49 94.29 30.00
5 29 21 20 13 23 34 74 47 35 49 47 46 25 27 31 18 21 33 19 26 21 12 19 22 27 42 57 41 28 27 46 31.65 73.88 31.00
6 34 36 38 23 40 26 15 27 39 17 15 7.17 ~ 28 15 15 18 12 16 18 27 19 16 15 27 17 12 13 19 18 ~ 21.47 40.04 29.00
7 20 30 20 17 15 23 32 15 21 22 18 24 27 28 30 27 26 21 46 61 45 36 35 28 19 43 31 26 21 21 26 27.52 60.72 31.00
8 23 11 37 19 17 31 31 25 16 56 51 53 33 44 45 24 40 17 35 52 20 11 16 13 15 30 9 9 10 17 32 27.11 56.38 31.00
9 77 79 45 57 27 30 73 52 32 26 54 19 27 23 25 28 25 17 28 22 41 58 30 91 92 53 78 32 93 82 ~ 47.21 93.32 30.00
10 52 41 30 41 53 49 76 36 45 17 16 24 31 36 48 85 35 23 77 32 49 39 46 20 12 23 18 8.37 18 17 17 35.94 85.21 31.00
11 9 38 32 31 27 35 103 76 99 60 27 106 90 54 33 45 25 36 53 23 37 76 127 173 68 85 140 165 75 63 ~ 66.91 172.55 30.00
12 53 92 95 64 32 19 21 32 94 164 126 169 20 47 68 30 131 154 28 30 33 64 94 56 24 22 29 73 69 83 40 66.28 169.23 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. 38 32 11 7 2 0 0 0 90 52 20 9 2 0 0 0 192
REL. 42.2 35.5 12.2 7.7 2.2 0.0 0.0 0.0 100.0 57.8 22.2 10.0 2.2 0.0 0.0 0.04.2
ID 42 35 12 15 11 0 0 0 116
ABS. 51 33 6 0 0 0 0 0 90 39 6 0 0 0 0 0 94
REL. 56.6 36.6 6.6 0.0 0.0 0.0 0.0 0.0 100.0 43.3 6.7 0.0 0.0 0.0 0.0 0.0 20.4
ID 56 36 6 0 0 0 0 0 100
ABS. 61 23 8 0 0 0 0 0 92 31 8 0 0 0 0 0 93
REL. 66.3 25.0 8.6 0.0 0.0 0.0 0.0 0.0100.0 33.7 8.7 0.0 0.0 0.0 0.0 0.0 29.9
ID 66 25 8 0 0 0 0 0 100
ABS. 35 28 18 6 5 0 0 0 92 57 29 11 5 0 0 0 173
REL 38.0 30.4 19.5 6.5 5.4 0.0 0.0 0.0100.0 62.0 31.5 12.0 5.4 0.0 0.0 0.024.11
ID 38 30 19 13 27 0 0 0 128
Year
ABS. 185 116 43 13 7 0 0 0 364 179 63 20 7 0 0 0 192
REL. 50.8 31.8 11.8 3.5 1.9 0.0 0.0 0.0100.0 49.2 17.3 5.5 1.9 0.0 0.0 0.0 4.2
ID 50 31 11 7 9 0 0 0 111

Note:

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