Detailed overview of ambient air pollution valuis from individual stations


Year: 2000
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station:1001 - Chomutov
Code:CZCVCMCHO
Institution:Czech Hydrometeorological Institute
Region:Severocesky
District:Chomutov
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 35 55 74 47 94 51 72 93 48 53 73 64 26 45 43 33 19 17 23 33 25 48 25 42 90 65 65 57 28 22 19 47.89 93.53 31.00
2 53 31 27 30 30 60 36 21 15 47 44 38 18 31 43 51 37 32 40 22 53 77 67 51 24 40 64 74 36 ~ ~ 41.02 77.34 29.00
3 26 21 31 10 18 25 29 25 14 27 15 26 59 33 16 23 19 25 20 28 27 71 82 73 52 36 24 34 36 31 34 31.81 81.70 31.00
4 35 44 56 59 19 18 18 24 36 39 44 60 29 47 34 49 31 47 42 49 33 35 23 15 36 41 27 22 30 25 ~ 35.55 60.22 30.00
5 28 28 36 32 33 28 23 23 32 30 26 22 25 27 31 31 24 26 26 16 23 21 29 31 26 23 20 20 22 25 31 26.43 35.63 31.00
6 27 27 27 28 21 21 21 25 26 26 15 19 22 18 17 15 15 21 37 37 22 23 24 18 14 15 18 19 21 20 ~ 21.96 37.33 30.00
7 23 23 29 25 12 19 27 14 20 29 20 19 26 26 13 13 21 21 14 19 19 16 25 45 25 22 24 19 13 16 28 21.38 44.65 31.00
8 36 23 26 21 17 20 22 29 23 31 22 28 33 35 23 27 24 32 27 23 24 25 27 27 24 18 26 42 32 38 37 27.18 41.98 31.00
9 29 23 12 17 27 32 33 35 32 33 33 38 41 29 33 26 23 30 39 27 38 49 29 42 54 60 84 77 36 40 ~ 36.73 83.81 30.00
10 27 38 33 44 44 37 15 29 27 42 45 86 94 60 30 71 34 58 57 35 68 66 91 61 47 42 40 58 43 119 56 51.53 118.68 31.00
11 75 54 59 36 57 41 73 83 65 52 69 63 71 73 92 98 46 63 90 78 81 108 73 69 33 47 70 65 62 54 ~ 66.79 107.70 30.00
12 73 55 61 65 39 28 29 58 61 35 48 48 28 30 21 15 36 98 101 85 68 39 55 76 37 57 74 65 88 85 40 54.80 101.07 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. 42 37 12 0 0 0 0 0 91 49 12 0 0 0 0 0 94
REL. 46.1 40.6 13.1 0.0 0.0 0.0 0.0 0.0 100.0 53.8 13.2 0.0 0.0 0.0 0.0 0.05.1
ID 46 40 13 0 0 0 0 0 100
ABS. 71 20 0 0 0 0 0 0 91 20 0 0 0 0 0 0 60
REL. 78.0 21.9 0.0 0.0 0.0 0.0 0.0 0.0 100.0 22.0 0.0 0.0 0.0 0.0 0.0 0.0 12.4
ID 78 21 0 0 0 0 0 0 100
ABS. 73 17 2 0 0 0 0 0 92 19 2 0 0 0 0 0 84
REL. 79.3 18.4 2.1 0.0 0.0 0.0 0.0 0.0100.0 20.7 2.2 0.0 0.0 0.0 0.0 0.0 27.9
ID 79 18 2 0 0 0 0 0 100
ABS. 13 49 27 3 0 0 0 0 92 79 30 3 0 0 0 0 119
REL 14.1 53.2 29.3 3.2 0.0 0.0 0.0 0.0100.0 85.9 32.6 3.3 0.0 0.0 0.0 0.030.10
ID 14 53 29 6 0 0 0 0 103
Year
ABS. 199 123 41 3 0 0 0 0 366 167 44 3 0 0 0 0 119
REL. 54.3 33.6 11.2 0.8 0.0 0.0 0.0 0.0100.0 45.6 12.0 0.8 0.0 0.0 0.0 0.030.10
ID 54 33 11 1 0 0 0 0 100

Note:

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