Detailed overview of ambient air pollution valuis from individual stations


Year: 2001
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 773 - Pha4-Branik
Code:CZ04CMBRA
Institution:Czech Hydrometeorological Institute
Region:Prague
District:Praha 4
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 64 52 108 122 72 45 71 145 ~ ~ 105 107 169 95 257 158 62 147 106 71 56 58 61 94 95 110 63 97 169 92 65 100.55 256.86 29.00
2 73 69 78 77 43 85 177 165 79 101 123 174 114 111 200 246 63 41 59 33 37 31 47 63 68 92 91 113 ~ ~ ~ 94.75 246.06 28.00
3 149 104 85 63 48 118 93 88 103 34 59 48 69 48 110 122 71 80 32 33 86 129 141 86 66 38 47 57 64 119 86 79.96 149.01 31.00
4 108 133 102 86 55 64 34 50 102 82 60 32 25 25 22 56 87 51 82 43 25 44 74 107 51 64 67 43 98 76 ~ 64.81 132.53 30.00
5 110 35 58 49 27 22 32 50 72 72 35 30 54 46 46 59 52 46 40 71 48 62 71 88 46 52 44 77 87 66 61 55.06 109.52 31.00
6 49 39 32 34 86 78 55 48 32 34 46 52 71 80 61 27 38 31 31 51 61 36 17 39 55 68 85 56 54 38 ~ 49.44 85.56 30.00
7 46 41 43 38 37 23 21 32 54 71 53 56 60 40 23 49 58 45 75 44 31 51 56 66 42 45 51 52 54 70 46 47.57 75.30 31.00
8 58 63 48 33 41 54 56 39 71 59 34 59 80 89 83 59 34 55 67 52 41 59 73 71 50 88 49 35 80 93 68 59.42 93.12 31.00
9 29 56 78 57 60 70 46 21 22 55 40 51 66 63 38 45 55 54 102 74 58 60 40 71 73 97 66 52 66 64 ~ 57.62 102.21 30.00
10 59 89 90 72 103 65 104 120 109 105 83 108 106 151 152 186 76 109 145 85 68 106 88 98 109 64 36 63 78 59 82 95.75 186.02 31.00
11 39 84 80 78 83 64 64 46 55 93 121 93 71 125 160 152 75 58 112 178 107 50 35 66 113 280 156 93 93 83 ~ 96.88 279.78 30.00
12 32 34 56 79 147 98 48 50 109 122 206 48 57 91 94 43 94 119 80 69 44 49 50 24 25 38 39 30 66 25 33 67.71 206.16 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. 3 28 26 22 6 3 0 0 88 85 57 31 9 3 0 0 257
REL. 3.4 31.8 29.5 25.0 6.8 3.4 0.0 0.0 100.0 96.6 64.8 35.2 10.2 3.4 0.0 0.015.1
ID 3 31 29 50 34 85 0 0 234
ABS. 15 49 21 6 0 0 0 0 91 76 27 6 0 0 0 0 133
REL. 16.4 53.8 23.0 6.5 0.0 0.0 0.0 0.0 100.0 83.5 29.7 6.6 0.0 0.0 0.0 0.0 2.4
ID 16 53 23 13 0 0 0 0 106
ABS. 9 62 20 1 0 0 0 0 92 83 21 1 0 0 0 0 102
REL. 9.7 67.3 21.7 1.0 0.0 0.0 0.0 0.0100.0 90.2 22.8 1.1 0.0 0.0 0.0 0.0 19.9
ID 9 67 21 2 0 0 0 0 101
ABS. 6 28 29 20 7 2 0 0 92 86 58 29 9 2 0 0 280
REL 6.5 30.4 31.5 21.7 7.6 2.1 0.0 0.0100.0 93.5 63.0 31.5 9.8 2.2 0.0 0.026.11
ID 6 30 31 43 38 54 0 0 204
Year
ABS. 33 167 96 49 13 5 0 0 363 330 163 67 18 5 0 0 280
REL. 9.0 46.0 26.4 13.4 3.5 1.3 0.0 0.0100.0 90.9 44.9 18.5 5.0 1.4 0.0 0.026.11
ID 9 46 26 26 17 34 0 0 160

Note:

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