Detailed overview of ambient air pollution valuis from individual stations

Year: 1999
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 772 - Pha2-Riegrovy sady
Code:CZ02CMRIE
Institution:Czech Hydrometeorological Institute
Region:Hlavni mesto Praha
District:Praha 2
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 33 36 54 43 65 92 41 47 36 38 55 44 48 38 40 52 56 65 49 51 44 119 49 50 39 57 58 53 32 29 53 50.59 119.50 31.00
2 70 94 68 38 24 23 37 50 136 137 65 32 27 35 48 33 30 48 65 68 36 38 37 48 38 82 60 41 ~ ~ ~ 53.76 136.99 28.00
3 26 56 78 ~ 47 53 62 54 71 69 45 86 60 51 44 39 57 99 60 30 35 42 34 79 125 65 30 22 50 86 111 58.83 125.04 30.00
4 107 72 65 30 35 40 33 30 40 28 30 34 30 29 28 35 28 39 44 54 43 55 68 46 42 52 41 49 54 75 ~ 45.30 107.16 30.00
5 31 29 52 21 28 29 32 31 39 26 26 25 32 34 16 41 ~ 26 33 34 36 26 36 58 42 46 45 39 27 31 24 33.25 58.31 30.00
6 34 41 39 24 36 18 31 35 42 36 33 31 21 26 29 39 32 27 29 24 27 21 37 62 35 23 24 29 39 35 ~ 32.01 62.32 30.00
7 36 36 19 18 15 18 19 29 20 10 18 34 21 22 31 28 27 30 28 29 21 23 22 17 61 27 24 28 29 40 26 25.99 60.81 31.00
8 44 46 71 52 53 32 25 22 43 28 24 37 44 17 22 22 29 33 26 24 17 41 58 86 51 28 32 26 53 46 47 38.08 86.32 31.00
9 29 47 44 23 26 31 45 80 83 80 43 59 53 120 63 61 38 26 23 ~ ~ ~ 53 44 39 25 32 41 25 47 ~ 47.36 119.55 27.00
10 23 27 22 36 54 41 48 39 21 28 42 75 129 53 55 38 45 59 62 64 44 48 49 45 71 48 34 50 70 52 29 48.32 128.57 31.00
11 76 80 101 100 109 47 38 58 57 55 55 67 46 29 70 64 56 52 77 59 111 69 73 101 83 155 59 80 58 70 ~ 71.83 155.33 30.00
12 42 38 36 25 30 35 31 50 51 71 37 17 34 46 50 42 44 46 44 56 66 87 96 32 36 26 46 50 53 44 55 45.66 96.24 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. 13 58 13 5 0 0 0 0 89 76 18 5 0 0 0 0 137
REL. 14.6 65.1 14.6 5.6 0.0 0.0 0.0 0.0 100.0 85.4 20.2 5.6 0.0 0.0 0.0 0.010.2
ID 14 65 14 11 0 0 0 0 105
ABS. 43 43 3 1 0 0 0 0 90 47 4 1 0 0 0 0 107
REL. 47.7 47.7 3.3 1.1 0.0 0.0 0.0 0.0 100.0 52.2 4.4 1.1 0.0 0.0 0.0 0.0 1.4
ID 47 47 3 2 0 0 0 0 101
ABS. 51 32 5 1 0 0 0 0 89 38 6 1 0 0 0 0 120
REL. 57.3 35.9 5.6 1.1 0.0 0.0 0.0 0.0100.0 42.7 6.7 1.1 0.0 0.0 0.0 0.0 14.9
ID 57 35 5 2 0 0 0 0 101
ABS. 13 57 16 5 1 0 0 0 92 79 22 6 1 0 0 0 155
REL 14.1 61.9 17.3 5.4 1.0 0.0 0.0 0.0100.0 85.9 23.9 6.5 1.1 0.0 0.0 0.026.11
ID 14 61 17 10 5 0 0 0 109
Year
ABS. 120 190 37 12 1 0 0 0 360 240 50 13 1 0 0 0 155
REL. 33.3 52.7 10.2 3.3 0.2 0.0 0.0 0.0100.0 66.7 13.9 3.6 0.3 0.0 0.0 0.026.11
ID 33 52 10 6 1 0 0 0 104

Note:

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