Detailed overview of ambient air pollution valuis from individual stations

Year: 2000
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 771 - Pha1-nam. Republiky
Code:CZ01CMREP
Institution:Czech Hydrometeorological Institute
Region:Hlavni mesto Praha
District:Praha 1
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 101 94 95 104 126 199 193 89 84 86 93 93 64 79 103 67 64 56 69 56 53 78 74 139 133 102 105 92 41 53 49 91.45 199.17 31.00
2 112 67 76 73 58 98 65 42 42 67 87 57 37 59 64 54 67 73 78 51 100 99 113 87 69 117 95 79 101 ~ ~ 75.40 116.79 29.00
3 67 58 52 51 48 74 49 40 47 76 45 69 99 59 54 67 80 78 66 82 69 146 170 130 86 63 57 76 55 82 68 72.94 169.82 31.00
4 83 60 67 98 50 54 54 77 51 71 102 78 49 100 56 55 61 83 64 103 117 60 36 31 54 96 58 40 52 67 ~ 67.59 117.27 30.00
5 49 46 67 104 83 52 28 39 63 74 56 46 60 101 110 116 86 80 75 52 54 72 75 80 45 47 35 29 38 35 50 62.77 115.79 31.00
6 52 40 50 39 36 36 49 55 44 39 29 49 39 46 38 37 34 41 55 52 68 37 46 29 31 40 42 44 53 49 ~ 43.35 68.32 30.00
7 42 69 44 33 19 34 39 25 20 28 42 44 34 39 38 30 35 44 32 40 31 36 34 56 38 31 38 28 24 39 70 37.33 70.29 31.00
8 55 34 34 40 38 39 47 51 63 57 49 47 73 67 53 46 51 54 58 62 31 52 63 86 72 40 55 99 107 102 91 58.57 107.48 31.00
9 92 36 34 65 93 67 71 61 75 88 103 87 70 74 60 40 52 65 79 63 84 87 55 73 108 131 102 71 63 61 ~ 73.69 131.31 30.00
10 51 100 82 112 106 77 62 66 78 73 110 128 221 118 81 143 103 71 194 97 70 166 84 89 64 65 63 121 64 87 91 97.92 221.32 31.00
11 90 98 140 68 95 75 132 135 118 116 109 86 127 133 135 136 86 72 147 132 127 228 261 196 88 60 ~ ~ 153 86 ~ 122.50 260.76 28.00
12 80 86 118 137 78 61 81 159 196 111 104 85 57 66 55 42 83 118 159 197 88 120 92 96 90 134 72 104 166 92 94 103.85 196.90 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. 0 34 39 15 3 0 0 0 91 91 57 18 3 0 0 0 199
REL. 0.0 37.3 42.8 16.4 3.2 0.0 0.0 0.0 100.0 100.0 62.6 19.8 3.3 0.0 0.0 0.06.1
ID 0 37 42 32 16 0 0 0 129
ABS. 6 59 19 7 0 0 0 0 91 85 26 7 0 0 0 0 117
REL. 6.5 64.8 20.8 7.6 0.0 0.0 0.0 0.0 100.0 93.4 28.6 7.7 0.0 0.0 0.0 0.0 21.4
ID 6 64 20 15 0 0 0 0 107
ABS. 12 53 21 6 0 0 0 0 92 80 27 6 0 0 0 0 131
REL. 13.0 57.6 22.8 6.5 0.0 0.0 0.0 0.0100.0 87.0 29.3 6.5 0.0 0.0 0.0 0.0 26.9
ID 13 57 22 13 0 0 0 0 106
ABS. 0 13 35 30 9 3 0 0 90 90 77 42 12 3 0 0 261
REL 0.0 14.4 38.8 33.3 10.0 3.3 0.0 0.0100.0 100.0 85.6 46.7 13.3 3.3 0.0 0.023.11
ID 0 14 38 66 50 83 0 0 253
Year
ABS. 18 159 114 58 12 3 0 0 364 346 187 73 15 3 0 0 261
REL. 4.9 43.6 31.3 15.9 3.2 0.8 0.0 0.0100.0 95.1 51.4 20.1 4.1 0.8 0.0 0.023.11
ID 4 43 31 31 16 20 0 0 148

Note:

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