Detailed overview of ambient air pollution valuis from individual stations

Year: 1998
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station:1321 - Plzen-stred
Code:CZPMPZPST
Institution:Plzeň Municipal Authority
Region:Zapadocesky
District:Plzen-mesto
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 77 92 25 29 35 52 54 36 70 125 78 96 73 126 218 72 37 75 64 71 38 48 60 52 41 101 117 99 109 88 51 74.55 218.19 31.00
2 48 84 108 179 126 147 83 98 116 213 198 82 92 75 95 113 100 145 128 157 190 79 91 82 154 117 63 30 ~ ~ ~ 113.99 212.82 28.00
3 31 42 46 40 40 48 28 31 56 68 44 60 60 32 57 76 71 77 59 67 35 29 42 83 92 98 97 60 56 92 166 60.75 165.72 31.00
4 148 113 98 34 73 98 46 75 94 43 38 29 75 61 68 61 55 51 65 93 76 58 67 55 48 41 42 63 45 36 ~ 65.07 147.74 30.00
5 24 27 51 35 46 56 64 77 47 45 85 77 36 40 38 20 37 36 50 61 43 45 37 54 74 72 62 52 34 28 30 47.82 84.88 31.00
6 56 58 69 59 34 38 33 ~ 58 34 44 41 28 24 38 38 49 40 61 31 40 43 46 51 60 34 25 51 50 38 ~ 43.84 68.96 29.00
7 39 35 31 29 33 34 40 36 42 38 27 56 36 52 49 42 29 24 45 79 36 54 46 47 21 26 37 36 32 37 59 39.77 79.45 31.00
8 20 16 38 31 50 53 61 43 24 44 74 ~ 43 39 41 28 ~ 86 33 73 31 30 30 38 56 37 38 40 30 33 70 42.45 85.78 29.00
9 59 51 49 32 28 37 56 98 107 52 55 41 64 33 50 47 49 58 40 40 41 62 48 53 59 45 121 133 108 42 ~ 58.59 133.02 30.00
10 40 40 39 28 50 43 59 67 81 27 27 51 67 56 101 116 52 50 69 61 85 107 95 34 27 54 36 20 48 41 26 54.87 116.36 31.00
11 23 79 57 50 53 87 123 97 94 116 103 142 70 41 46 ~ ~ ~ 66 53 35 37 64 86 65 89 96 86 34 53 ~ 72.09 142.32 27.00
12 40 51 ~ 68 41 33 57 87 151 232 96 127 34 88 105 73 170 227 42 59 91 78 96 67 33 31 72 181 49 40 22 84.80 232.41 30.00

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. 8 29 31 14 6 2 0 0 90 82 53 22 8 2 0 0 218
REL. 8.8 32.2 34.4 15.5 6.6 2.2 0.0 0.0 100.0 91.1 58.9 24.4 8.9 2.2 0.0 0.015.1
ID 8 32 34 31 33 55 0 0 195
ABS. 11 61 16 2 0 0 0 0 90 79 18 2 0 0 0 0 148
REL. 12.2 67.7 17.7 2.2 0.0 0.0 0.0 0.0 100.0 87.8 20.0 2.2 0.0 0.0 0.0 0.0 1.4
ID 12 67 17 4 0 0 0 0 102
ABS. 21 59 6 4 0 0 0 0 90 69 10 4 0 0 0 0 133
REL. 23.3 65.5 6.6 4.4 0.0 0.0 0.0 0.0100.0 76.7 11.1 4.4 0.0 0.0 0.0 0.0 28.9
ID 23 65 6 8 0 0 0 0 104
ABS. 11 39 24 9 3 2 0 0 88 77 38 14 5 2 0 0 232
REL 12.5 44.3 27.2 10.2 3.4 2.2 0.0 0.0100.0 87.5 43.2 15.9 5.7 2.3 0.0 0.010.12
ID 12 44 27 20 17 56 0 0 178
Year
ABS. 51 188 77 29 9 4 0 0 358 307 119 42 13 4 0 0 232
REL. 14.2 52.5 21.5 8.1 2.5 1.1 0.0 0.0100.0 85.8 33.2 11.7 3.6 1.1 0.0 0.010.12
ID 14 52 21 16 12 27 0 0 144

Note:

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