Detailed overview of ambient air pollution valuis from individual stations

Year: 1998
Pollutant:NOx-nitrogen oxides(oxides of nitrogen)
Station: 772 - Pha2-Riegrovy sady
Code:CZ02CMRIE
Institution:CHMI
Region:Hlavni mesto Praha
District:Praha 2
IHd: 100
Measure method:chemiluminescence
Unit:ug/m^3

Average daily concentrations

Day/
Month

12345678910111213141516171819202122232425262728293031XMaxN
1 58 52 14 15 20 27 34 20 26 82 105 61 45 89 96 68 21 39 31 26 25 33 28 34 36 137 371 203 267 142 84 73.89 371.22 31.00
2 63 69 52 111 127 94 44 40 59 74 66 40 39 36 27 28 37 55 51 78 71 89 64 61 93 60 30 16 ~ ~ ~ 59.82 126.77 28.00
3 19 22 19 17 17 19 12 11 28 46 40 32 20 19 40 42 34 33 20 25 21 29 44 41 58 67 50 50 36 56 87 34.06 87.04 31.00
4 103 50 35 19 26 34 24 31 38 26 41 17 41 30 42 69 39 27 25 42 56 48 43 36 22 18 21 29 21 21 ~ 35.80 103.41 30.00
5 13 13 23 19 27 27 55 25 16 35 33 82 22 20 31 12 18 32 31 29 29 15 20 21 23 27 31 21 19 19 33 26.45 81.84 31.00
6 27 26 37 31 34 15 15 28 34 20 26 16 13 26 25 15 26 22 23 28 30 26 24 36 34 25 18 20 28 27 ~ 25.14 37.30 30.00
7 25 39 28 15 13 17 30 18 19 22 11 14 17 22 28 28 21 14 34 55 30 38 32 29 22 23 32 25 22 18 33 24.86 55.47 31.00
8 21 13 40 24 26 35 42 35 18 39 53 45 40 35 37 35 46 39 38 51 22 14 14 18 21 31 20 18 17 26 47 30.85 52.70 31.00
9 54 41 27 35 18 26 39 36 24 26 51 20 27 17 25 33 32 38 54 46 42 56 55 66 99 67 83 66 82 54 ~ 44.60 99.36 30.00
10 32 40 34 27 46 44 57 64 64 18 17 32 45 44 51 72 25 49 77 46 42 50 40 26 18 36 21 15 24 22 21 38.65 77.04 31.00
11 16 42 35 35 33 38 78 66 81 92 38 62 66 43 41 59 38 47 72 47 44 73 156 174 57 92 111 113 64 165 ~ 69.25 173.75 30.00
12 ~ ~ 64 49 34 33 ~ 51 108 171 145 150 25 70 93 50 122 147 36 45 56 70 78 64 36 25 29 65 99 51 34 71.44 170.85 28.00

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 36 14 5 0 2 1 0 90 58 22 8 3 3 1 0 371
REL. 35.5 40.0 15.5 5.5 0.0 2.2 1.1 0.0 100.0 64.4 24.4 8.9 3.3 3.3 1.1 0.027.1
ID 35 40 15 11 0 55 138 0 296
ABS. 67 21 2 1 0 0 0 0 91 24 3 1 0 0 0 0 103
REL. 73.6 23.0 2.1 1.0 0.0 0.0 0.0 0.0 100.0 26.4 3.3 1.1 0.0 0.0 0.0 0.0 1.4
ID 73 23 2 2 0 0 0 0 101
ABS. 53 35 4 0 0 0 0 0 92 39 4 0 0 0 0 0 99
REL. 57.6 38.0 4.3 0.0 0.0 0.0 0.0 0.0100.0 42.4 4.3 0.0 0.0 0.0 0.0 0.0 25.9
ID 57 38 4 0 0 0 0 0 100
ABS. 18 47 13 7 4 0 0 0 89 71 24 11 4 0 0 0 174
REL 20.2 52.8 14.6 7.8 4.4 0.0 0.0 0.0100.0 79.8 27.0 12.4 4.5 0.0 0.0 0.024.11
ID 20 52 14 15 22 0 0 0 125
Year
ABS. 170 139 33 13 4 2 1 0 362 192 53 20 7 3 1 0 371
REL. 46.9 38.3 9.1 3.5 1.1 0.5 0.2 0.0100.0 53.0 14.6 5.5 1.9 0.8 0.3 0.0 27.1
ID 46 38 9 7 5 13 34 0 155

Note:

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