Detailed overview of ambient air pollution valuis from individual stations

Year: 1998
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 261 - Chomutov-OHS
Code:CZCVHSCHO
Institution:Public Health Service
Region:Severocesky
District:Chomutov
IHd: 100
Measure method:trithanolamine spectophotometry
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 50 42 23 23 24 22 37 22 31 43 47 62 62 69 60 58 33 31 35 62 27 25 30 32 48 105 128 82 67 50 33 47.19 128.00 31.00
2 45 74 47 68 83 80 56 33 57 72 ~ 25 27 30 21 34 ~ 50 51 63 67 65 40 38 36 43 33 18 ~ ~ ~ 48.31 83.00 26.00
3 19 28 35 31 19 24 30 21 20 29 33 38 23 14 36 26 10 23 18 16 14 13 29 29 44 43 38 22 33 52 71 28.42 71.00 31.00
4 50 38 39 23 20 45 32 31 41 36 30 18 15 28 40 41 36 23 29 38 32 37 33 28 25 29 29 29 22 19 ~ 31.20 50.00 30.00
5 18 17 15 18 18 23 31 26 31 36 37 32 31 28 22 13 16 25 16 17 15 12 11 17 33 28 33 27 24 34 26 23.55 37.00 31.00
6 33 31 28 31 27 28 22 26 26 20 26 21 16 21 26 19 20 30 35 23 24 20 16 16 22 24 28 15 18 34 ~ 24.20 35.00 30.00
7 24 22 24 12 9.00 18 15 18 21 20 19 21 19 24 31 28 25 19 20 35 20 33 25 23 19 27 28 21 24 23 24 22.29 35.00 31.00
8 19 15 20 19 18 19 18 14 16 28 37 38 25 20 23 22 38 20 23 33 39 15 16 22 21 36 21 26 19 16 31 23.45 39.00 31.00
9 37 38 30 19 16 21 26 34 29 37 28 26 21 25 22 29 30 22 31 22 30 39 46 55 44 45 39 38 39 35 ~ 31.77 55.00 30.00
10 33 35 26 28 37 34 36 33 30 20 21 39 30 31 40 44 37 28 46 32 36 44 61 29 33 35 38 18 20 19 19 32.65 61.00 31.00
11 16 44 35 30 35 45 46 53 62 54 36 61 39 33 29 39 25 36 24 16 30 43 84 111 54 50 58 44 22 37 ~ 43.03 111.00 30.00
12 32 46 36 24 18 10 17 32 33 117 65 59 27 48 51 49 92 111 31 18 29 45 46 35 25 18 39 35 38 32 18 41.16 117.00 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. 43 33 10 2 0 0 0 0 88 45 12 2 0 0 0 0 128
REL. 48.8 37.5 11.3 2.2 0.0 0.0 0.0 0.0 100.0 51.1 13.6 2.3 0.0 0.0 0.0 0.027.1
ID 48 37 11 4 0 0 0 0 102
ABS. 75 16 0 0 0 0 0 0 91 16 0 0 0 0 0 0 50
REL. 82.4 17.5 0.0 0.0 0.0 0.0 0.0 0.0 100.0 17.6 0.0 0.0 0.0 0.0 0.0 0.0 1.4
ID 82 17 0 0 0 0 0 0 100
ABS. 73 19 0 0 0 0 0 0 92 19 0 0 0 0 0 0 55
REL. 79.3 20.6 0.0 0.0 0.0 0.0 0.0 0.0100.0 20.7 0.0 0.0 0.0 0.0 0.0 0.0 24.9
ID 79 20 0 0 0 0 0 0 100
ABS. 41 46 2 3 0 0 0 0 92 51 5 3 0 0 0 0 117
REL 44.5 50.0 2.1 3.2 0.0 0.0 0.0 0.0100.0 55.4 5.4 3.3 0.0 0.0 0.0 0.010.12
ID 44 50 2 6 0 0 0 0 103
Year
ABS. 232 114 12 5 0 0 0 0 363 131 17 5 0 0 0 0 128
REL. 63.9 31.4 3.3 1.3 0.0 0.0 0.0 0.0100.0 36.1 4.7 1.4 0.0 0.0 0.0 0.0 27.1
ID 63 31 3 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