Detailed overview of ambient air pollution valuis from individual stations

Year: 1998
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station:1026 - Louny
Code:CZLNCMLOU
Institution:CHMI
Region:Severocesky
District:Louny
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 46 38 13 13 12 17 40 17 23 50 47 75 52 54 71 83 19 27 29 29 26 23 27 30 32 67 67 53 59 46 21 38.90 82.95 31.00
2 41 53 37 64 82 87 52 29 66 68 54 36 32 28 26 25 23 59 53 67 56 71 35 33 37 34 16 7.28 ~ ~ ~ 45.30 86.67 28.00
3 9 12 12 8.73 16 20 12 15 23 33 36 30 23 18 23 34 30 28 24 19 18 18 31 24 33 37 34 32 31 39 48 24.86 47.63 31.00
4 50 29 34 16 17 28 21 23 31 22 18 17 22 24 30 26 23 21 29 27 36 26 33 26 25 25 27 23 ~ ~ ~ 26.12 49.58 28.00
5 ~ ~ 24 22 23 26 27 23 21 25 24 25 19 18 16 15 17 24 20 20 22 17 16 20 26 31 32 21 21 17 21 21.89 32.27 29.00
6 22 23 24 24 19 17 19 26 23 22 20 23 17 18 20 17 21 20 21 20 21 23 21 25 22 20 14 17 20 19 ~ 20.61 26.20 30.00
7 22 24 23 20 15 16 22 17 18 20 13 14 16 16 16 18 17 13 18 22 21 25 19 19 15 20 23 20 17 15 16 18.33 25.26 31.00
8 13 14 26 21 18 21 22 17 18 20 28 22 29 25 18 22 24 27 27 24 19 15 15 16 21 24 21 20 17 25 33 21.32 33.34 31.00
9 25 21 21 20 17 25 26 33 25 26 23 20 22 17 21 20 22 26 23 23 26 28 30 38 38 52 45 30 45 30 ~ 27.19 51.71 30.00
10 23 27 24 22 27 31 45 35 46 16 16 22 28 24 42 40 23 24 40 32 36 32 37 19 13 20 18 15 17 16 16 26.67 46.11 31.00
11 13 34 24 22 23 23 35 54 75 92 24 44 37 35 35 37 25 29 41 24 26 53 67 106 59 60 91 85 34 48 ~ 45.15 105.81 30.00
12 25 59 49 48 21 15 22 28 78 105 61 55 26 50 64 29 140 111 31 23 27 48 72 44 21 14 24 32 37 33 23 45.65 140.24 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. 50 30 10 0 0 0 0 0 90 40 10 0 0 0 0 0 87
REL. 55.5 33.3 11.1 0.0 0.0 0.0 0.0 0.0 100.0 44.4 11.1 0.0 0.0 0.0 0.0 0.06.2
ID 55 33 11 0 0 0 0 0 100
ABS. 84 3 0 0 0 0 0 0 87 3 0 0 0 0 0 0 50
REL. 96.5 3.4 0.0 0.0 0.0 0.0 0.0 0.0 100.0 3.4 0.0 0.0 0.0 0.0 0.0 0.0 1.4
ID 96 3 0 0 0 0 0 0 100
ABS. 85 7 0 0 0 0 0 0 92 7 0 0 0 0 0 0 52
REL. 92.3 7.6 0.0 0.0 0.0 0.0 0.0 0.0100.0 7.6 0.0 0.0 0.0 0.0 0.0 0.0 26.9
ID 92 7 0 0 0 0 0 0 100
ABS. 49 32 7 4 0 0 0 0 92 43 11 4 0 0 0 0 140
REL 53.2 34.7 7.6 4.3 0.0 0.0 0.0 0.0100.0 46.7 12.0 4.3 0.0 0.0 0.0 0.017.12
ID 53 34 7 8 0 0 0 0 104
Year
ABS. 268 72 17 4 0 0 0 0 361 93 21 4 0 0 0 0 140
REL. 74.2 19.9 4.7 1.1 0.0 0.0 0.0 0.0100.0 25.8 5.8 1.1 0.0 0.0 0.0 0.017.12
ID 74 19 4 2 0 0 0 0 101

Note:

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