Detailed overview of ambient air pollution valuis from individual stations

Year: 1998
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station:1037 - Cheb
Code:CZCHCMCHE
Institution:CHMI
Region:Zapadocesky
District:Cheb
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 58 23 10 8.06 10 15 16 12 21 51 104 147 67 73 35 30 16 15 18 21 17 30 29 32 38 74 73 62 61 56 27 40.35 147.18 31.00
2 34 49 45 93 74 98 56 27 45 68 55 39 37 29 24 22 18 34 36 37 39 39 29 38 28 30 23 13 ~ ~ ~ 41.39 98.01 28.00
3 12 15 16 12 13 15 9 8.59 21 16 11 29 19 16 14 23 32 30 19 19 15 9 15 26 43 19 34 25 19 52 51 21.29 52.11 31.00
4 38 17 18 11 13 16 15 22 29 15 13 17 17 23 16 27 23 26 18 20 24 24 33 21 16 23 17 24 22 15 ~ 20.42 38.04 30.00
5 13 15 15 19 20 20 27 29 25 30 22 39 21 18 20 13 21 23 18 20 18 15 12 14 19 22 28 23 18 17 14 20.33 39.46 31.00
6 20 21 22 26 18 18 13 16 15 16 18 15 12 12 14 13 16 18 18 13 14 17 16 16 16 16 13 12 19 15 ~ 16.21 25.74 30.00
7 17 17 14 13 13 17 16 16 18 15 11 11 12 13 14 14 16 10 18 27 16 18 18 15 16 19 16 17 15 13 16 15.51 26.79 31.00
8 14 11 17 20 12 ~ ~ 19 16 20 25 20 ~ 20 19 23 27 23 23 20 14 13 11 14 16 17 14 15 17 17 27 18.02 27.42 28.00
9 24 30 13 17 13 12 20 20 14 15 13 12 12 13 16 15 19 20 22 36 22 28 35 30 35 27 34 22 33 26 ~ 21.54 35.89 30.00
10 26 35 28 15 29 27 44 33 42 13 10 14 19 18 22 33 16 18 28 23 30 34 31 12 10 16 14 11 14 13 11 22.24 43.72 31.00
11 13 17 16 16 20 20 36 29 30 23 22 51 31 19 23 26 23 34 38 24 20 31 40 34 31 70 65 40 22 52 ~ 30.61 69.60 30.00
12 26 39 24 46 18 17 26 39 56 162 67 51 17 27 42 26 40 66 21 20 25 34 36 31 19 16 15 38 43 15 15 35.99 162.29 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. 55 26 7 2 0 0 0 0 90 35 9 2 0 0 0 0 147
REL. 61.1 28.8 7.7 2.2 0.0 0.0 0.0 0.0 100.0 38.9 10.0 2.2 0.0 0.0 0.0 0.012.1
ID 61 28 7 4 0 0 0 0 102
ABS. 89 2 0 0 0 0 0 0 91 2 0 0 0 0 0 0 39
REL. 97.8 2.1 0.0 0.0 0.0 0.0 0.0 0.0 100.0 2.2 0.0 0.0 0.0 0.0 0.0 0.0 12.5
ID 97 2 0 0 0 0 0 0 100
ABS. 85 4 0 0 0 0 0 0 89 4 0 0 0 0 0 0 36
REL. 95.5 4.4 0.0 0.0 0.0 0.0 0.0 0.0100.0 4.5 0.0 0.0 0.0 0.0 0.0 0.0 20.9
ID 95 4 0 0 0 0 0 0 100
ABS. 64 26 1 0 1 0 0 0 92 28 2 1 1 0 0 0 162
REL 69.5 28.2 1.0 0.0 1.0 0.0 0.0 0.0100.0 30.4 2.2 1.1 1.1 0.0 0.0 0.010.12
ID 69 28 1 0 5 0 0 0 104
Year
ABS. 293 58 8 2 1 0 0 0 362 69 11 3 1 0 0 0 162
REL. 80.9 16.0 2.2 0.5 0.2 0.0 0.0 0.0100.0 19.1 3.0 0.8 0.3 0.0 0.0 0.010.12
ID 80 16 2 1 1 0 0 0 101

Note:

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