Detailed overview of ambient air pollution valuis from individual stations

Year: 1998
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 778 - Pha7-Vystaviste
Code:CZ07CMVYS
Institution:CHMI
Region:Hlavni mesto Praha
District:Praha 7
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 52 80 22 23 21 24 46 21 21 125 70 85 41 93 144 93 ~ ~ ~ 19 16 27 28 47 49 127 117 88 87 60 32 59.10 143.50 28.00
2 61 89 49 126 195 141 65 45 97 165 119 40 32 29 37 35 30 77 58 98 125 85 71 52 70 65 36 19 ~ ~ ~ 75.44 194.74 28.00
3 22 26 26 23 14 22 14 12 16 51 62 40 16 23 35 26 26 20 20 17 15 25 22 7.77 15 32 17 28 20 17 30 23.84 61.75 31.00
4 45 10 16 ~ ~ ~ ~ ~ 57 45 34 19 31 37 66 40 39 21 20 47 43 43 52 40 38 40 41 42 39 33 ~ 37.40 65.91 25.00
5 26 21 18 12 28 31 50 37 38 45 48 50 34 26 22 20 19 40 22 25 29 11 22 28 32 42 60 46 38 35 45 32.32 59.84 31.00
6 29 50 35 29 51 33 24 40 52 27 24 12 10 45 23 19 32 21 18 22 31 25 21 25 34 19 22 19 16 22 ~ 27.64 52.01 30.00
7 18 25 16 9.00 10 12 23 9 13 17 7.79 22 17 15 32 21 18 9 23 68 31 30 28 21 12 25 26 14 18 19 23 20.39 68.08 31.00
8 22 18 42 34 27 43 45 55 31 53 54 58 43 43 53 36 58 36 38 67 39 27 37 35 31 46 28 30 26 15 27 38.71 67.40 31.00
9 65 59 51 59 42 58 84 85 71 64 90 49 61 47 40 41 48 38 41 39 41 54 53 85 104 76 97 54 69 66 ~ 61.04 104.19 30.00
10 50 59 54 49 64 61 71 58 66 40 39 47 68 73 57 117 60 37 81 57 75 79 84 56 39 52 36 27 38 35 42 57.07 116.74 31.00
11 30 66 68 61 46 49 83 113 146 140 37 97 100 71 44 56 36 50 73 43 47 76 119 184 81 101 146 143 70 80 ~ 81.91 184.10 30.00
12 53 91 97 66 34 25 28 41 88 181 137 154 30 65 106 42 144 174 38 38 35 58 96 65 45 39 45 76 91 64 39 73.69 180.52 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. 42 21 14 8 2 0 0 0 87 45 24 10 2 0 0 0 195
REL. 48.2 24.1 16.0 9.1 2.2 0.0 0.0 0.0 100.0 51.7 27.6 11.5 2.3 0.0 0.0 0.05.2
ID 48 24 16 18 11 0 0 0 118
ABS. 47 39 0 0 0 0 0 0 86 39 0 0 0 0 0 0 66
REL. 54.6 45.3 0.0 0.0 0.0 0.0 0.0 0.0 100.0 45.3 0.0 0.0 0.0 0.0 0.0 0.0 15.4
ID 54 45 0 0 0 0 0 0 100
ABS. 41 40 10 1 0 0 0 0 92 51 11 1 0 0 0 0 104
REL. 44.5 43.4 10.8 1.0 0.0 0.0 0.0 0.0100.0 55.4 12.0 1.1 0.0 0.0 0.0 0.0 25.9
ID 44 43 10 2 0 0 0 0 101
ABS. 5 49 23 11 4 0 0 0 92 87 38 15 4 0 0 0 184
REL 5.4 53.2 25.0 11.9 4.3 0.0 0.0 0.0100.0 94.6 41.3 16.3 4.3 0.0 0.0 0.024.11
ID 5 53 25 23 21 0 0 0 129
Year
ABS. 135 149 47 20 6 0 0 0 357 222 73 26 6 0 0 0 195
REL. 37.8 41.7 13.1 5.6 1.6 0.0 0.0 0.0100.0 62.2 20.4 7.3 1.7 0.0 0.0 0.0 5.2
ID 37 41 13 11 8 0 0 0 112

Note:

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