Detailed overview of ambient air pollution valuis from individual stations

Year: 1999
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station:1014 - Decin
Code:CZDCCMDEC
Institution:Czech Hydrometeorological Institute
Region:Severocesky
District:Decin
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 17 25 40 106 201 175 139 86 60 33 29 44 70 75 80 64 51 92 49 38 55 76 53 71 78 119 81 65 18 17 36 69.29 201.31 31.00
2 93 102 70 30 14 15 48 70 75 76 41 21 21 31 88 45 19 53 111 175 64 62 29 40 67 174 103 93 ~ ~ ~ 65.33 174.50 28.00
3 55 109 110 82 113 49 65 75 56 72 26 52 39 34 27 31 52 66 55 38 33 38 31 69 48 71 41 22 32 62 69 55.45 112.82 31.00
4 65 47 38 29 38 61 53 49 56 42 49 47 42 54 50 32 33 42 54 42 57 60 54 28 33 57 42 44 49 52 ~ 46.60 64.83 30.00
5 25 22 40 23 18 13 16 36 39 41 40 44 44 33 15 26 28 28 26 36 41 22 26 37 40 32 42 40 30 30 31 31.12 43.91 31.00
6 25 29 41 49 19 21 46 44 35 31 26 21 19 26 ~ 26 31 24 22 24 26 36 32 37 31 25 29 47 39 35 ~ 30.77 48.66 29.00
7 42 37 33 37 23 28 36 37 37 23 31 43 43 47 37 28 20 30 36 46 36 35 25 16 19 24 24 22 27 27 18 31.22 46.83 31.00
8 22 34 34 36 49 34 37 25 46 54 51 48 42 34 28 55 54 44 48 46 38 20 36 45 50 37 41 28 28 49 79 40.93 78.88 31.00
9 56 58 51 51 47 70 76 67 74 52 38 39 60 66 66 73 49 37 16 15 39 52 58 59 63 71 82 94 47 46 ~ 55.76 94.20 30.00
10 52 47 56 63 94 82 ~ 99 55 62 81 88 95 90 89 77 50 62 81 50 34 28 43 42 95 76 84 117 128 61 96 72.52 127.50 30.00
11 139 95 86 83 60 74 92 123 75 42 45 54 83 65 87 44 93 86 61 52 42 55 78 137 151 118 89 110 45 73 ~ 81.24 151.25 30.00
12 73 43 46 70 34 62 37 115 207 134 73 ~ 54 85 50 71 33 84 72 56 80 77 45 15 25 43 152 58 133 88 37 71.67 207.40 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. 20 34 23 9 3 1 0 0 90 70 36 13 4 1 0 0 201
REL. 22.2 37.7 25.5 10.0 3.3 1.1 0.0 0.0 100.0 77.8 40.0 14.4 4.4 1.1 0.0 0.05.1
ID 22 37 25 20 16 27 0 0 150
ABS. 41 49 0 0 0 0 0 0 90 49 0 0 0 0 0 0 65
REL. 45.5 54.4 0.0 0.0 0.0 0.0 0.0 0.0 100.0 54.4 0.0 0.0 0.0 0.0 0.0 0.0 1.4
ID 45 54 0 0 0 0 0 0 100
ABS. 25 58 9 0 0 0 0 0 92 67 9 0 0 0 0 0 94
REL. 27.1 63.0 9.7 0.0 0.0 0.0 0.0 0.0100.0 72.8 9.8 0.0 0.0 0.0 0.0 0.0 28.9
ID 27 63 9 0 0 0 0 0 100
ABS. 4 36 37 10 2 1 0 0 90 86 50 13 3 1 0 0 207
REL 4.4 40.0 41.1 11.1 2.2 1.1 0.0 0.0100.0 95.6 55.6 14.4 3.3 1.1 0.0 0.0 9.12
ID 4 40 41 22 11 27 0 0 146
Year
ABS. 90 177 69 19 5 2 0 0 362 272 95 26 7 2 0 0 207
REL. 24.8 48.8 19.0 5.2 1.3 0.5 0.0 0.0100.0 75.1 26.2 7.2 1.9 0.6 0.0 0.0 9.12
ID 24 48 19 10 6 13 0 0 124

Note:

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