Detailed overview of ambient air pollution valuis from individual stations


Year: 1999
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 777 - Pha6-Veleslavin
Code:CZ06CMVEL
Institution:Czech Hydrometeorological Institute
Region:Hlavni mesto Praha
District:Praha 6
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 26 34 39 32 55 79 29 37 21 37 60 37 44 32 29 31 58 63 55 58 49 101 44 38 33 38 44 44 11 12 39 42.29 100.64 31.00
2 57 61 51 28 9 10 24 38 127 145 45 17 14 30 53 34 17 29 52 34 26 26 20 27 26 63 56 30 ~ ~ ~ 41.11 145.22 28.00
3 24 ~ 60 99 51 46 36 49 68 70 41 114 64 52 25 44 63 126 52 22 40 46 41 88 143 119 59 28 46 64 95 62.43 143.09 30.00
4 100 57 66 29 38 42 27 24 40 27 28 42 30 35 21 17 17 26 29 73 45 65 87 28 35 46 26 46 40 55 ~ 41.30 99.53 30.00
5 23 15 30 32 36 45 43 32 58 35 25 28 26 22 7.66 24 37 32 37 34 39 20 26 53 23 34 59 45 25 33 15 32.00 58.69 31.00
6 30 55 46 23 24 14 24 21 38 42 24 17 14 27 18 27 21 16 23 26 13 10 20 46 38 31 37 26 43 27 ~ 27.31 54.90 30.00
7 37 36 24 26 18 18 15 10 14 13 29 41 27 20 28 17 27 32 45 29 24 20 14 22 47 21 20 32 46 43 30 26.57 47.48 31.00
8 39 50 81 69 54 33 31 28 55 34 23 34 62 32 28 39 39 36 32 23 16 38 80 97 80 49 46 22 60 60 44 45.62 97.47 31.00
9 16 37 54 36 38 48 41 54 102 85 60 103 99 155 105 59 58 35 41 40 61 78 79 55 50 36 47 49 29 46 ~ 59.93 154.94 30.00
10 23 23 23 39 40 24 39 40 16 18 34 48 129 37 41 19 29 79 79 67 51 55 53 46 59 38 26 41 51 97 37 45.15 128.55 31.00
11 112 100 91 121 203 44 36 45 48 55 62 69 31 20 71 77 57 55 54 48 105 71 49 77 83 237 59 118 86 120 ~ 80.05 236.74 30.00
12 45 28 30 27 18 34 30 46 55 82 30 16 28 40 33 29 37 38 29 41 67 125 120 52 47 36 53 45 48 46 70 45.95 125.25 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. 29 47 6 7 0 0 0 0 89 60 13 7 0 0 0 0 145
REL. 32.5 52.8 6.7 7.8 0.0 0.0 0.0 0.0 100.0 67.4 14.6 7.9 0.0 0.0 0.0 0.010.2
ID 32 52 6 15 0 0 0 0 107
ABS. 53 35 3 0 0 0 0 0 91 38 3 0 0 0 0 0 100
REL. 58.2 38.4 3.2 0.0 0.0 0.0 0.0 0.0 100.0 41.8 3.3 0.0 0.0 0.0 0.0 0.0 1.4
ID 58 38 3 0 0 0 0 0 100
ABS. 36 43 9 3 1 0 0 0 92 56 13 4 1 0 0 0 155
REL. 39.1 46.7 9.7 3.2 1.0 0.0 0.0 0.0100.0 60.9 14.1 4.3 1.1 0.0 0.0 0.0 14.9
ID 39 46 9 6 5 0 0 0 107
ABS. 22 45 15 8 0 2 0 0 92 70 25 10 2 2 0 0 237
REL 23.9 48.9 16.3 8.6 0.0 2.1 0.0 0.0100.0 76.1 27.2 10.9 2.2 2.2 0.0 0.026.11
ID 23 48 16 17 0 54 0 0 160
Year
ABS. 140 170 33 18 1 2 0 0 364 224 54 21 3 2 0 0 237
REL. 38.4 46.7 9.0 4.9 0.2 0.5 0.0 0.0100.0 61.5 14.8 5.8 0.8 0.5 0.0 0.026.11
ID 38 46 9 9 1 13 0 0 119

Note:

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