Detailed overview of ambient air pollution valuis from individual stations

Year: 2001
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 771 - Pha1-nam. Republiky
Code:CZ01CMREP
Institution:Czech Hydrometeorological Institute
Region:Prague
District:Praha 1
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 85 75 136 179 126 72 90 119 108 127 115 138 168 119 216 151 62 146 94 73 72 96 89 89 115 144 83 137 122 81 74 112.99 216.29 31.00
2 79 80 99 103 55 107 132 123 91 110 87 177 74 107 235 278 80 63 72 54 53 63 80 74 110 96 105 104 ~ ~ ~ 103.20 277.73 28.00
3 100 99 81 73 66 78 78 93 115 53 56 64 61 53 120 135 78 80 43 61 103 123 137 86 84 56 74 83 74 144 96 85.37 143.51 31.00
4 93 119 97 82 66 69 63 62 99 84 66 55 48 47 43 79 87 63 97 68 47 55 97 110 77 59 83 48 105 82 ~ 75.02 118.67 30.00
5 88 58 59 75 43 33 46 47 83 88 56 50 57 52 56 54 61 62 58 63 55 71 104 118 66 70 57 55 48 62 60 63.04 117.77 31.00
6 49 28 25 48 76 69 52 59 43 39 50 64 83 70 57 33 35 40 41 66 61 45 36 56 77 83 86 58 70 46 ~ 54.84 85.69 30.00
7 38 44 43 46 52 26 25 31 53 61 44 43 47 49 29 46 54 44 62 60 46 59 64 69 44 62 66 69 54 76 47 50.11 76.36 31.00
8 67 55 52 42 28 ~ ~ ~ 73 56 46 37 88 85 59 71 47 66 76 54 47 64 74 92 89 64 44 44 92 68 75 62.76 92.13 28.00
9 52 45 57 56 66 64 49 29 17 37 39 60 65 65 47 63 65 75 95 78 60 78 64 77 71 90 76 64 77 72 ~ 61.74 95.20 30.00
10 60 66 71 75 130 81 110 125 135 99 65 134 123 177 149 153 98 118 196 111 75 84 124 106 90 71 60 72 60 86 81 102.82 196.36 31.00
11 62 82 99 79 84 66 60 49 80 120 112 ~ 85 116 146 169 113 89 102 125 112 73 76 91 163 273 185 99 100 123 ~ 107.90 272.84 29.00
12 63 57 86 144 174 121 78 86 140 152 127 66 94 99 112 65 98 100 79 78 54 69 70 41 41 55 54 48 75 52 74 85.50 173.59 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 15 39 29 4 3 0 0 90 90 75 36 7 3 0 0 278
REL. 0.0 16.6 43.3 32.2 4.4 3.3 0.0 0.0 100.0 100.0 83.3 40.0 7.8 3.3 0.0 0.016.2
ID 0 16 43 64 22 83 0 0 230
ABS. 4 54 28 5 0 0 0 0 91 87 33 5 0 0 0 0 119
REL. 4.3 59.3 30.7 5.4 0.0 0.0 0.0 0.0 100.0 95.6 36.3 5.5 0.0 0.0 0.0 0.0 2.4
ID 4 59 30 10 0 0 0 0 105
ABS. 7 57 25 0 0 0 0 0 89 82 25 0 0 0 0 0 95
REL. 7.8 64.0 28.0 0.0 0.0 0.0 0.0 0.0100.0 92.1 28.1 0.0 0.0 0.0 0.0 0.0 19.9
ID 7 64 28 0 0 0 0 0 100
ABS. 0 20 37 25 8 1 0 0 91 91 71 34 9 1 0 0 273
REL 0.0 21.9 40.6 27.4 8.7 1.0 0.0 0.0100.0 100.0 78.0 37.4 9.9 1.1 0.0 0.026.11
ID 0 21 40 54 43 27 0 0 189
Year
ABS. 11 146 129 59 12 4 0 0 361 350 204 75 16 4 0 0 278
REL. 3.0 40.4 35.7 16.3 3.3 1.1 0.0 0.0100.0 97.0 56.5 20.8 4.4 1.1 0.0 0.0 16.2
ID 3 40 35 32 16 27 0 0 156

Note:

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