Detailed overview of ambient air pollution valuis from individual stations

Year: 1998
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 488 - Cheb-zubni odd.
Code:CZCHHSCHZ
Institution:Public Health Service
Region:Zapadocesky
District:Cheb
IHd: 100
Measure method:trithanolamine spectophotometry
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 57 46 22 14 19 17 ~ 25 9.00 39 103 147 88 80 50 44 ~ 41 37 38 29 39 ~ 46 48 67 78 55 46 14 45 47.96 147.00 28.00
2 89 ~ 47 ~ 111 ~ 98 60 53 93 105 89 ~ 19 21 20 20 34 23 ~ 5.00 38 ~ ~ 7.00 11 13 12 ~ ~ ~ 46.10 111.00 21.00
3 13 10 10 17 ~ 5.00 4.00 4.00 20 34 42 ~ 36 25 26 ~ ~ ~ ~ 16 ~ ~ 30 44 41 41 4.00 37 26 ~ 66 25.05 66.00 22.00
4 58 28 25 19 19 25 33 27 36 50 29 18 10 32 47 42 41 31 36 41 34 46 ~ 9.00 37 48 ~ ~ ~ ~ ~ 32.84 58.00 25.00
5 32 40 21 31 30 22 26 42 48 47 67 54 50 30 4.00 28 28 36 32 28 29 19 25 20 13 ~ 37 54 48 29 36 33.53 67.00 30.00
6 29 46 48 30 34 60 39 24 32 31 18 5.00 22 35 30 19 19 13 20 ~ 37 39 22 25 36 30 27 5.00 27 7.00 ~ 27.90 60.00 29.00
7 37 8.00 31 23 16 17 12 10 21 17 15 4.00 20 5.00 23 41 4.00 25 5.00 28 34 38 32 34 29 31 30 21 22 23 26 22.00 41.00 31.00
8 24 25 37 8.00 34 9.00 46 8.00 76 46 54 45 20 30 30 4.00 66 9.00 59 7.00 4.00 47 22 20 16 24 14 15 15 20 26 27.74 76.00 31.00
9 4.00 66 37 ~ 35 35 35 27 32 38 ~ 28 17 17 11 17 17 19 26 30 36 35 41 40 38 40 10 69 13 72 ~ 31.61 72.00 28.00
10 63 17 58 7.00 41 44 5.00 32 6.00 7.00 6.00 12 33 28 40 61 45 44 74 41 51 61 17 69 43 30 22 22 26 23 23 33.90 74.00 31.00
11 29 40 48 25 25 31 48 10 76 39 6.00 40 39 17 62 23 20 30 37 41 32 24 5.00 122 28 88 25 111 112 72 ~ 43.50 122.00 30.00
12 54 63 53 63 37 22 14 40 26 75 50 78 42 41 33 19 45 105 38 22 16 28 12 57 23 33 25 49 53 40 31 41.52 105.00 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. 32 27 8 4 0 0 0 0 71 39 12 4 0 0 0 0 147
REL. 45.0 38.0 11.2 5.6 0.0 0.0 0.0 0.0 100.0 54.9 16.9 5.6 0.0 0.0 0.0 0.012.1
ID 45 38 11 11 0 0 0 0 105
ABS. 51 32 1 0 0 0 0 0 84 33 1 0 0 0 0 0 67
REL. 60.7 38.0 1.1 0.0 0.0 0.0 0.0 0.0 100.0 39.3 1.2 0.0 0.0 0.0 0.0 0.0 11.5
ID 60 38 1 0 0 0 0 0 100
ABS. 61 26 3 0 0 0 0 0 90 29 3 0 0 0 0 0 76
REL. 67.7 28.8 3.3 0.0 0.0 0.0 0.0 0.0100.0 32.2 3.3 0.0 0.0 0.0 0.0 0.0 9.8
ID 67 28 3 0 0 0 0 0 100
ABS. 45 36 7 4 0 0 0 0 92 47 11 4 0 0 0 0 122
REL 48.9 39.1 7.6 4.3 0.0 0.0 0.0 0.0100.0 51.1 12.0 4.3 0.0 0.0 0.0 0.024.11
ID 48 39 7 8 0 0 0 0 104
Year
ABS. 189 121 19 8 0 0 0 0 337 148 27 8 0 0 0 0 147
REL. 56.0 35.9 5.6 2.3 0.0 0.0 0.0 0.0100.0 43.9 8.0 2.4 0.0 0.0 0.0 0.0 12.1
ID 56 35 5 4 0 0 0 0 102

Note:

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