Detailed overview of ambient air pollution valuis from individual stations

Year: 1999
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station:1321 - Plzen-stred
Code:CZPMPZPST
Institution:Mun. Authority of the town Plzen
Region:Zapadocesky
District:Plzen-mesto
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 20 27 48 52 140 383 147 52 46 30 53 47 51 43 40 177 76 57 72 72 58 105 49 54 50 56 52 52 29 44 40 71.68 383.46 31.00
2 64 93 83 50 25 26 26 67 100 86 65 33 41 53 105 47 37 81 64 96 26 44 47 63 48 112 89 54 ~ ~ ~ 61.64 111.56 28.00
3 32 36 70 67 52 55 82 88 72 92 64 54 45 46 51 36 52 89 74 32 33 45 47 84 150 138 41 35 52 68 115 64.42 149.73 31.00
4 122 69 64 25 102 69 44 58 49 39 41 34 35 69 39 38 42 90 43 68 75 83 64 52 54 51 39 52 44 66 ~ 57.23 121.73 30.00
5 27 35 38 28 33 43 25 35 59 50 35 28 60 39 22 29 27 ~ ~ ~ ~ 27 44 ~ 42 46 34 ~ 27 32 32 35.83 59.87 25.00
6 32 30 34 33 24 27 29 70 32 26 50 23 26 33 33 30 28 38 29 26 41 35 38 38 24 24 28 49 58 36 ~ 34.18 70.11 30.00
7 43 48 28 15 12 15 26 41 12 6.73 ~ ~ 20 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 25 24.43 48.02 12.00
8 34 29 35 36 75 55 34 39 42 40 37 57 41 24 22 33 50 40 51 61 19 26 50 79 55 66 48 23 40 61 61 43.86 78.50 31.00
9 72 39 39 20 28 37 46 83 99 70 28 60 43 81 78 59 53 24 28 33 71 60 70 91 69 36 78 73 39 48 ~ 55.17 98.55 30.00
10 34 71 29 46 68 59 54 47 30 24 63 ~ ~ ~ ~ ~ ~ ~ 44 35 ~ ~ 63 37 95 96 114 117 102 57 109 63.46 117.22 22.00
11 204 143 91 61 125 68 48 ~ ~ 48 54 56 50 46 72 76 82 92 98 76 80 ~ 147 213 102 224 94 127 80 108 ~ 98.69 224.22 27.00
12 57 57 61 41 47 63 58 66 154 106 75 24 55 67 90 64 64 65 90 90 133 98 105 42 41 30 61 54 78 66 ~ 70.14 154.14 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. 12 48 20 8 1 0 1 0 90 78 30 10 2 1 1 0 383
REL. 13.3 53.3 22.2 8.8 1.1 0.0 1.1 0.0 100.0 86.7 33.3 11.1 2.2 1.1 1.1 0.06.1
ID 13 53 22 17 5 0 138 0 251
ABS. 29 46 8 2 0 0 0 0 85 56 10 2 0 0 0 0 122
REL. 34.1 54.1 9.4 2.3 0.0 0.0 0.0 0.0 100.0 65.9 11.8 2.4 0.0 0.0 0.0 0.0 1.4
ID 34 54 9 4 0 0 0 0 102
ABS. 21 38 14 0 0 0 0 0 73 52 14 0 0 0 0 0 99
REL. 28.7 52.0 19.1 0.0 0.0 0.0 0.0 0.0100.0 71.2 19.2 0.0 0.0 0.0 0.0 0.0 9.9
ID 28 52 19 0 0 0 0 0 100
ABS. 5 35 22 13 1 3 0 0 79 74 39 17 4 3 0 0 224
REL 6.3 44.3 27.8 16.4 1.2 3.7 0.0 0.0100.0 93.7 49.4 21.5 5.1 3.8 0.0 0.026.11
ID 6 44 27 32 6 94 0 0 212
Year
ABS. 67 167 64 23 2 3 1 0 327 260 93 29 6 4 1 0 383
REL. 20.4 51.0 19.5 7.0 0.6 0.9 0.3 0.0100.0 79.5 28.4 8.9 1.8 1.2 0.3 0.0 6.1
ID 20 51 19 14 3 22 38 0 169

Note:

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