Detailed overview of ambient air pollution valuis from individual stations

Year: 2001
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station:1105 - Plzen-Doubravka
Code:CZPMCMDOU
Institution:Czech Hydrometeorological Institute
Region:Plzensky
District:Plzen-mesto
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 20 24 64 33 43 25 27 49 36 58 27 71 23 43 41 39 15 25 18 18 20 21 23 40 60 46 19 41 96 58 36 37.41 96.37 31.00
2 38 36 30 42 24 40 61 27 39 24 53 67 17 41 90 115 28 15 24 20 29 20 20 15 30 45 20 19 ~ ~ ~ 36.77 115.47 28.00
3 53 25 21 23 17 14 19 19 41 18 16 20 19 21 23 43 30 16 16 15 19 25 31 21 15 10 12 11 13 35 30 22.27 53.36 31.00
4 27 17 37 17 18 21 15 19 18 30 17 9 6.51 12 13 19 24 24 17 12 11 16 25 21 13 29 37 16 9 10 ~ 18.67 37.15 30.00
5 8.97 11 18 15 13 9 14 15 11 15 17 8.19 8.94 14 23 21 20 21 25 12 10 8.59 8.76 14 13 15 18 21 15 10 14 14.39 24.99 31.00
6 13 14 11 18 17 29 21 16 8.22 12 19 15 14 27 22 11 14 10 14 21 19 16 11 12 13 10 18 18 24 15 ~ 16.11 28.59 30.00
7 13 9 7.52 8.63 7.62 6.77 12 15 21 20 20 17 15 11 9 17 18 24 ~ ~ ~ ~ 16 18 15 19 17 11 ~ 26 26 15.38 25.93 26.00
8 10 12 15 12 16 15 16 22 16 18 14 26 28 18 8.44 16 9 8.93 17 21 16 23 11 15 18 15 23 15 9 13 27 16.30 28.11 31.00
9 17 15 21 22 16 20 20 13 17 24 20 22 17 25 19 18 27 17 11 18 24 25 10 21 26 29 50 22 11 29 ~ 20.85 50.49 30.00
10 26 37 38 26 26 23 27 35 36 41 40 61 35 14 23 37 24 17 34 10 20 29 35 33 31 26 36 26 26 40 ~ 30.39 61.07 30.00
11 ~ 31 42 36 48 36 26 21 35 20 28 52 36 47 81 73 31 24 56 61 63 35 27 35 41 56 31 38 38 27 ~ 40.49 80.56 29.00
12 11 11 12 50 40 26 14 13 21 84 106 28 20 27 95 31 56 39 51 35 35 23 23 25 16 23 22 22 18 18 34 33.21 106.49 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. 58 27 4 1 0 0 0 0 90 32 5 1 0 0 0 0 115
REL. 64.4 30.0 4.4 1.1 0.0 0.0 0.0 0.0 100.0 35.6 5.6 1.1 0.0 0.0 0.0 0.016.2
ID 64 30 4 2 0 0 0 0 101
ABS. 89 2 0 0 0 0 0 0 91 2 0 0 0 0 0 0 37
REL. 97.8 2.1 0.0 0.0 0.0 0.0 0.0 0.0 100.0 2.2 0.0 0.0 0.0 0.0 0.0 0.0 3.4
ID 97 2 0 0 0 0 0 0 100
ABS. 86 1 0 0 0 0 0 0 87 1 0 0 0 0 0 0 50
REL. 98.8 1.1 0.0 0.0 0.0 0.0 0.0 0.0100.0 1.1 0.0 0.0 0.0 0.0 0.0 0.0 27.9
ID 98 1 0 0 0 0 0 0 100
ABS. 47 38 4 1 0 0 0 0 90 43 5 1 0 0 0 0 106
REL 52.2 42.2 4.4 1.1 0.0 0.0 0.0 0.0100.0 47.8 5.6 1.1 0.0 0.0 0.0 0.011.12
ID 52 42 4 2 0 0 0 0 101
Year
ABS. 280 68 8 2 0 0 0 0 358 78 10 2 0 0 0 0 115
REL. 78.2 18.9 2.2 0.5 0.0 0.0 0.0 0.0100.0 21.8 2.8 0.6 0.0 0.0 0.0 0.0 16.2
ID 78 18 2 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