Detailed overview of ambient air pollution valuis from individual stations

Year: 1999
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 780 - Pha9-Vysocany
Code:CZ09CMVYS
Institution:Czech Hydrometeorological Institute
Region:Hlavni mesto Praha
District:Praha 9
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 ~ ~ ~ ~ ~ ~ 62 60 28 20 32 36 42 36 30 77 74 82 47 54 44 84 42 48 44 73 72 57 32 25 51 50.04 83.90 25.00
2 84 98 69 40 20 18 32 54 165 161 80 34 26 34 54 38 24 39 60 63 23 37 37 59 49 145 142 50 ~ ~ ~ 61.88 164.81 28.00
3 36 83 90 94 75 75 65 63 111 64 35 61 32 35 40 29 68 134 59 23 25 43 44 127 140 67 20 20 59 138 141 67.67 140.76 31.00
4 113 83 81 32 43 53 43 39 83 27 26 39 34 25 25 32 23 87 63 110 46 93 61 33 39 44 36 55 62 82 ~ 53.73 112.53 30.00
5 30 30 46 16 19 18 19 26 65 26 25 22 28 31 13 58 15 15 32 25 36 21 56 59 39 37 32 29 15 23 20 29.89 65.28 31.00
6 21 22 44 29 24 15 52 54 51 27 41 43 24 34 44 61 62 39 47 30 38 29 54 79 24 24 26 46 49 50 ~ 39.51 79.02 30.00
7 76 56 23 13 14 20 25 34 20 8.66 17 31 28 30 52 42 32 55 40 36 29 31 29 20 66 30 27 36 42 46 27 33.45 76.42 31.00
8 62 44 65 52 75 35 35 39 51 34 38 45 66 19 32 29 40 36 32 31 20 54 60 164 60 31 27 25 71 76 85 49.52 164.16 31.00
9 39 53 43 19 20 41 88 117 118 84 30 64 56 128 66 73 36 24 18 21 55 87 78 92 51 32 47 57 29 70 ~ 57.87 128.10 30.00
10 30 25 23 56 86 46 65 41 23 35 44 124 173 72 64 34 42 46 44 37 25 27 31 35 96 69 42 91 81 37 53 54.68 172.65 31.00
11 125 102 155 69 82 45 40 64 58 39 43 49 41 27 97 43 52 66 78 56 125 57 65 116 77 199 46 72 68 82 ~ 74.55 198.51 30.00
12 40 37 31 21 28 33 28 40 33 53 29 12 30 37 48 39 32 39 37 50 46 49 45 11 19 13 69 55 68 61 64 38.64 69.43 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. 18 39 17 8 2 0 0 0 84 66 27 10 2 0 0 0 165
REL. 21.4 46.4 20.2 9.5 2.3 0.0 0.0 0.0 100.0 78.6 32.1 11.9 2.4 0.0 0.0 0.09.2
ID 21 46 20 19 11 0 0 0 119
ABS. 43 39 7 2 0 0 0 0 91 48 9 2 0 0 0 0 113
REL. 47.2 42.8 7.6 2.1 0.0 0.0 0.0 0.0 100.0 52.7 9.9 2.2 0.0 0.0 0.0 0.0 1.4
ID 47 42 7 4 0 0 0 0 102
ABS. 36 40 12 3 1 0 0 0 92 56 16 4 1 0 0 0 164
REL. 39.1 43.4 13.0 3.2 1.0 0.0 0.0 0.0100.0 60.9 17.4 4.3 1.1 0.0 0.0 0.0 24.8
ID 39 43 13 6 5 0 0 0 107
ABS. 20 48 16 5 3 0 0 0 92 72 24 8 3 0 0 0 199
REL 21.7 52.1 17.3 5.4 3.2 0.0 0.0 0.0100.0 78.3 26.1 8.7 3.3 0.0 0.0 0.026.11
ID 21 52 17 10 16 0 0 0 118
Year
ABS. 117 166 52 18 6 0 0 0 359 242 76 24 6 0 0 0 199
REL. 32.5 46.2 14.4 5.0 1.6 0.0 0.0 0.0100.0 67.4 21.2 6.7 1.7 0.0 0.0 0.026.11
ID 32 46 14 10 8 0 0 0 111

Note:

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