Detailed overview of ambient air pollution valuis from individual stations

Year: 1999
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station:1012 - Usti n.L.-mesto
Code:CZULCMUNM
Institution:Czech Hydrometeorological Institute
Region:Severocesky
District:Usti nad Labem
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 23 29 59 163 224 212 128 103 70 27 45 ~ ~ 55 41 105 67 92 68 65 66 96 71 82 98 82 90 64 22 16 34 79.21 224.47 29.00
2 129 160 74 41 19 22 35 57 92 105 47 24 15 28 127 62 25 49 137 139 54 40 38 45 71 161 144 99 ~ ~ ~ 72.77 161.25 28.00
3 57 130 94 109 98 45 70 77 72 80 29 69 52 42 26 27 49 79 53 24 34 47 38 86 96 102 36 19 38 57 68 61.39 129.63 31.00
4 59 65 45 48 59 68 43 42 62 48 42 30 35 32 38 32 21 41 58 53 76 69 49 38 35 55 38 37 51 51 ~ 47.39 75.85 30.00
5 31 24 37 27 27 35 30 46 47 42 30 40 36 45 12 22 34 26 29 35 52 26 29 45 43 36 43 40 29 35 31 34.33 52.05 31.00
6 30 37 40 44 24 23 47 46 40 28 26 18 18 26 34 37 43 35 33 33 20 19 31 42 35 34 32 51 43 39 ~ 33.66 50.73 30.00
7 39 34 26 22 16 19 28 31 18 17 24 34 35 38 37 36 27 35 44 59 43 37 23 17 27 24 24 31 33 30 22 29.98 58.79 31.00
8 27 32 41 42 58 41 35 36 49 52 33 33 42 31 36 34 41 41 40 29 16 24 42 43 58 40 33 21 31 43 99 39.43 99.26 31.00
9 32 37 35 30 31 56 45 62 64 58 38 50 69 69 74 66 47 43 26 31 62 61 74 67 65 57 64 72 45 26 ~ 51.86 74.38 30.00
10 55 38 36 43 63 43 57 60 32 35 56 62 86 45 59 47 28 58 71 47 31 35 31 33 86 53 49 83 82 75 81 53.57 86.42 31.00
11 135 79 74 99 79 50 67 88 44 45 40 55 52 38 79 67 68 56 60 50 40 48 84 210 233 189 107 122 55 81 ~ 83.06 232.99 30.00
12 78 36 39 61 27 45 35 76 104 116 88 ~ 40 54 38 48 47 63 42 42 76 91 62 25 30 48 105 52 63 59 59 58.21 116.06 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. 16 30 25 12 3 2 0 0 88 72 42 17 5 2 0 0 224
REL. 18.1 34.0 28.4 13.6 3.4 2.2 0.0 0.0 100.0 81.8 47.7 19.3 5.7 2.3 0.0 0.05.1
ID 18 34 28 27 17 56 0 0 181
ABS. 32 56 3 0 0 0 0 0 91 59 3 0 0 0 0 0 76
REL. 35.1 61.5 3.2 0.0 0.0 0.0 0.0 0.0 100.0 64.8 3.3 0.0 0.0 0.0 0.0 0.0 21.4
ID 35 61 3 0 0 0 0 0 100
ABS. 35 50 7 0 0 0 0 0 92 57 7 0 0 0 0 0 99
REL. 38.0 54.3 7.6 0.0 0.0 0.0 0.0 0.0100.0 62.0 7.6 0.0 0.0 0.0 0.0 0.0 31.8
ID 38 54 7 0 0 0 0 0 100
ABS. 8 52 22 6 1 2 0 0 91 83 31 9 3 2 0 0 233
REL 8.7 57.1 24.1 6.5 1.0 2.1 0.0 0.0100.0 91.2 34.1 9.9 3.3 2.2 0.0 0.025.11
ID 8 57 24 13 5 54 0 0 163
Year
ABS. 91 188 57 18 4 4 0 0 362 271 83 26 8 4 0 0 233
REL. 25.1 51.9 15.7 4.9 1.1 1.1 0.0 0.0100.0 74.9 22.9 7.2 2.2 1.1 0.0 0.025.11
ID 25 51 15 9 5 27 0 0 135

Note:

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