Detailed overview of ambient air pollution valuis from individual stations

Year: 1998
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 773 - Pha4-Branik
Code:CZ04CMBRA
Institution:CHMI
Region:Hlavni mesto Praha
District:Praha 4
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 75 39 14 19 23 33 41 26 33 132 111 52 58 108 126 76 26 104 76 57 38 49 59 55 70 227 244 91 140 80 51 75.35 244.35 31.00
2 70 86 72 203 158 185 67 63 116 179 85 57 56 42 40 51 89 131 87 221 140 115 121 102 183 125 50 36 ~ ~ ~ 104.72 221.46 28.00
3 41 47 42 54 46 46 26 28 49 82 100 63 40 36 72 76 54 65 44 42 29 43 80 82 141 120 73 104 158 183 146 71.35 182.87 31.00
4 145 128 106 63 92 94 66 88 124 73 77 27 67 58 125 114 63 54 65 93 87 127 129 71 76 52 59 63 61 56 ~ 83.40 144.98 30.00
5 51 43 57 41 42 73 104 64 58 108 105 114 67 48 48 28 54 60 54 47 50 22 24 30 ~ 58 91 53 81 60 106 61.54 114.20 30.00
6 80 88 86 78 85 75 86 115 96 68 87 51 46 64 65 ~ ~ 50 74 53 72 63 ~ 80 72 32 28 39 44 47 ~ 67.55 114.88 27.00
7 46 55 36 22 21 31 55 26 37 37 17 26 42 57 60 54 37 28 64 102 58 77 69 58 28 73 57 49 43 41 56 47.22 101.81 31.00
8 23 17 57 34 39 58 51 48 51 93 71 61 59 51 49 52 69 63 55 93 37 21 32 37 47 55 45 31 27 48 71 49.83 92.95 31.00
9 130 76 54 64 32 73 90 69 49 50 91 34 53 37 46 59 56 57 78 75 88 106 110 142 141 132 122 71 97 76 ~ 78.62 142.35 30.00
10 60 62 45 39 66 60 85 105 110 29 36 57 61 57 94 134 38 64 124 69 66 84 66 47 29 60 46 27 45 40 35 62.62 134.47 31.00
11 26 95 52 56 74 74 131 117 125 164 62 102 75 51 68 130 55 78 ~ 56 51 90 ~ 142 82 125 133 201 61 76 ~ 91.24 201.11 28.00
12 52 82 89 78 38 26 41 64 183 165 189 163 33 96 223 69 242 212 43 67 82 112 192 79 31 25 29 71 151 79 34 98.05 242.28 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. 10 34 18 18 6 4 0 0 90 80 46 28 10 4 0 0 244
REL. 11.1 37.7 20.0 20.0 6.6 4.4 0.0 0.0 100.0 88.9 51.1 31.1 11.1 4.4 0.0 0.027.1
ID 11 37 20 40 33 111 0 0 253
ABS. 7 38 28 14 0 0 0 0 87 80 42 14 0 0 0 0 145
REL. 8.0 43.6 32.1 16.0 0.0 0.0 0.0 0.0 100.0 92.0 48.3 16.1 0.0 0.0 0.0 0.0 1.4
ID 8 43 32 32 0 0 0 0 116
ABS. 15 50 19 8 0 0 0 0 92 77 27 8 0 0 0 0 142
REL. 16.3 54.3 20.6 8.6 0.0 0.0 0.0 0.0100.0 83.7 29.3 8.7 0.0 0.0 0.0 0.0 24.9
ID 16 54 20 17 0 0 0 0 108
ABS. 9 34 23 13 7 4 0 0 90 81 47 24 11 4 0 0 242
REL 10.0 37.7 25.5 14.4 7.7 4.4 0.0 0.0100.0 90.0 52.2 26.7 12.2 4.4 0.0 0.017.12
ID 10 37 25 28 38 111 0 0 252
Year
ABS. 41 156 88 53 13 8 0 0 359 318 162 74 21 8 0 0 244
REL. 11.4 43.4 24.5 14.7 3.6 2.2 0.0 0.0100.0 88.6 45.1 20.6 5.8 2.2 0.0 0.0 27.1
ID 11 43 24 29 18 55 0 0 182

Note:

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