Detailed overview of ambient air pollution valuis from individual stations

Year: 1999
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 778 - Pha7-Vystaviste
Code:CZ07CMVYS
Institution:Czech Hydrometeorological Institute
Region:Hlavni mesto Praha
District:Praha 7
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 36 44 73 53 83 158 51 49 32 39 59 49 67 54 56 103 97 93 108 115 95 139 101 114 92 108 74 52 13 44 63 74.63 157.74 31.00
2 ~ ~ 54 26 10 12 29 42 110 118 64 22 27 35 64 34 16 28 75 70 33 27 20 31 ~ ~ 85 50 ~ ~ ~ 45.01 117.96 24.00
3 23 45 106 133 50 55 44 61 101 90 35 73 51 47 26 34 57 106 61 22 38 47 29 106 162 105 41 22 34 68 67 62.58 161.81 31.00
4 77 50 62 32 49 52 24 ~ 47 35 26 41 34 41 22 23 22 29 30 57 76 62 75 34 32 39 30 36 44 46 ~ 42.41 76.66 29.00
5 27 22 32 22 24 32 33 31 37 26 19 20 23 28 8.03 19 26 27 31 37 36 21 26 55 30 32 49 46 21 30 16 28.61 55.30 31.00
6 35 43 30 24 26 14 26 25 37 30 18 16 16 15 15 23 20 16 17 28 19 8.73 19 35 30 28 37 27 48 29 ~ 25.20 47.65 30.00
7 47 29 29 19 15 13 10 11 11 13 21 36 28 16 22 16 25 37 44 39 19 16 13 22 34 19 16 19 26 30 23 23.18 46.74 31.00
8 30 38 50 49 60 33 26 24 52 31 15 23 36 27 20 26 26 42 20 15 10 22 43 55 51 41 37 17 35 33 40 33.08 59.63 31.00
9 14 24 37 32 35 50 30 43 64 67 34 62 62 89 81 54 46 25 31 34 53 67 74 74 ~ ~ ~ ~ ~ 66 ~ 49.98 88.88 25.00
10 27 53 26 44 38 24 50 38 17 23 37 54 108 43 32 19 29 60 58 50 51 55 72 51 86 56 31 62 61 68 40 47.13 108.33 31.00
11 112 117 61 97 125 44 40 40 38 56 48 72 35 22 48 71 57 46 58 43 99 ~ ~ 95 99 157 77 89 74 107 ~ 72.40 157.45 28.00
12 35 32 42 24 22 39 31 50 85 93 55 23 29 48 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 43.47 92.94 14.00

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. 19 35 15 15 2 0 0 0 86 67 32 17 2 0 0 0 162
REL. 22.0 40.6 17.4 17.4 2.3 0.0 0.0 0.0 100.0 77.9 37.2 19.8 2.3 0.0 0.0 0.025.3
ID 22 40 17 34 11 0 0 0 126
ABS. 59 28 3 0 0 0 0 0 90 31 3 0 0 0 0 0 77
REL. 65.5 31.1 3.3 0.0 0.0 0.0 0.0 0.0 100.0 34.4 3.3 0.0 0.0 0.0 0.0 0.0 1.4
ID 65 31 3 0 0 0 0 0 100
ABS. 48 33 6 0 0 0 0 0 87 39 6 0 0 0 0 0 89
REL. 55.1 37.9 6.8 0.0 0.0 0.0 0.0 0.0100.0 44.8 6.9 0.0 0.0 0.0 0.0 0.0 14.9
ID 55 37 6 0 0 0 0 0 100
ABS. 16 37 14 5 1 0 0 0 73 57 20 6 1 0 0 0 157
REL 21.9 50.6 19.1 6.8 1.3 0.0 0.0 0.0100.0 78.1 27.4 8.2 1.4 0.0 0.0 0.026.11
ID 21 50 19 13 6 0 0 0 112
Year
ABS. 142 133 38 20 3 0 0 0 336 194 61 23 3 0 0 0 162
REL. 42.2 39.5 11.3 5.9 0.8 0.0 0.0 0.0100.0 57.7 18.2 6.8 0.9 0.0 0.0 0.0 25.3
ID 42 39 11 11 4 0 0 0 109

Note:

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