KAZALCI OKOLJA

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The indicator shows the number of days per year when the 24-hour limit concentration 50 µg/m3 and the annual limit value 40 µg/m3 were exceeded in the selected Slovenian urban areas that are most affected by pollution.

“Particulate matter” means a combination of finely divided solid or liquid particles suspended in the air, of various physical and chemical compositions.

A portion of airborne particles is formed as a consequence of direct emissions (primary particles), others are formed as products of various processes in the atmosphere (secondary particles).

Particle size distribution is usually described in terms of trimodal size distribution. Particles ranging between 0.01 and 0.1 µm belong in the so-called nucleation area, particles ranging between 0.1 and 1 µm belong in the accumulation area, and particles larger than 1 µm are known as coarse particles.


Charts

Figure ZR08-1: Number of days with exceeded 24-hour limit concentration PM10 50 µg/m3, which may not be exceeded more than 35 times per calendar year
Sources: 

National authomatic measurement air quality network database, Environmental Agency of the Republic of Slovenia, 2008

Show data
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
Urban background number of days 68 48 38
- Ljubljana Bežigrad number of days np np np np 36 64 71 70 47 46
- Ljubljana BF* number of days np np np np np np np np np np
- Celje number of days np 43 34 41 58 100 62 97 59 48
- Koper number of days np np np np np np np np 40 19
- Nova Gorica number of days np np np np 24 18 33 37 47 40
Suburban background number of days 65 43 35
- Trbovlje* number of days 58 80 77 40 52 88 48 157 86 81
- Pesje number of days np np np np np 17 11 23 24 14
- Škale number of days np np np np np 4 8 15 19 11
Urban-traffic type number of days 122 102 95
- Maribor center* number of days np np np np 66 129 102 101 108 91
- Zagorje* number of days np np np np 48 79 82 143 106 99
Rural/Agricultural type number of days 40 36 28
- Vnajnarje* number of days np np np np np np np np 20 10
- Prapretno number of days np np np np np np 19 15 33 36
- Murska Sobota - Rakičan number of days np np np np 33 58 19 65 54 37
Rural/Industrial type number of days 17
- Morsko* number of days np np np np np np np np np 18
- Gorenje Polje* number of days np np np np np np np np np 16
Rural type/natural background number of days 5 5 0
- Iskrba* number of days np np np np np np np 5 5 0
2008 2009 2010
Urban background number of days 29 25 35
- Ljubljana Bežigrad number of days 36 30 43
- Ljubljana BF* number of days np 25 32
- Celje number of days 37 42 58
- Koper number of days 11 2 15
- Nova Gorica number of days 33 24 25
Suburban background number of days 31 24 29
- Trbovlje* number of days 72 48 64
- Pesje number of days 9 12 10
- Škale number of days 12 13 12
Urban-traffic type number of days 82 46 58
- Maribor center* number of days 54 35 47
- Zagorje* number of days 109 56 68
Rural/Agricultural type number of days 34 19 28
- Vnajnarje* number of days np 7 2
- Prapretno number of days 25 20 29
- Murska Sobota - Rakičan number of days 42 30 52
Rural/Industrial type number of days 20 15 9
- Morsko* number of days 16 14 5
- Gorenje Polje* number of days 24 16 13
Rural type/natural background number of days 0 5 5
- Iskrba* number of days 0 5 5
Figure ZR08-2: Average annual concentration (annual limit value is 40 µg/m3)
Sources: 

National authomatic measurement air quality network database, Environmental Agency of the Republic of Slovenia, 2008

Show data
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
Urban background µg/m3 38 33 32
- Ljubljana Bežigrad µg/m3 np np np 43 42 46 41 37 33 32
- Ljubljana BF* µg/m3 np np np np np np np np np np
- Celje µg/m3 42 47 46 45 46 53 41 43 35 32
- Koper µg/m3 np np np np np np np np 31 29
- Nova Gorica µg/m3 np np np np 39 37 35 34 32 33
Suburban background µg/m3 35 31 27
- Trbovlje* µg/m3 52 59 61 50 47 52 40 55 40 37
- Pesje µg/m3 np np np np np 31 25 27 28 21
- Škale µg/m3 np np np np np 27 23 23 26 24
Urban-traffic type µg/m3 47 45 41
- Maribor center* µg/m3 np np np 48 50 58 48 43 43 40
- Zagorje* µg/m3 np np np np 47 51 44 52 46 41
- EIS Celje µg/m3 62 53 64 np np 51 40 45 np np
Rural/Agricultural type µg/m3 33 31 28
- Vnajnarje* µg/m3 np np np np np np np np 26 22
- Prapretno µg/m3 np np np np np np 30 28 34 33
- Murska Sobota-Rakičan µg/m3 np np np np 40 43 32 37 34 30
Rural/Industrial type µg/m3 24
- Morsko* µg/m3 np np np np np np np np np 23
- Gorenje Polje* µg/m3 np np np np np np np np np 24
Rural type/natural background µg/m3 16 16 15
- Iskrba* µg/m3 np np np np np np np 16 16 15
2008 2009 2010
Urban background µg/m3 29 27 29
- Ljubljana Bežigrad µg/m3 30 29 30
- Ljubljana BF* µg/m3 np 26 27
- Celje µg/m3 30 31 32
- Koper µg/m3 25 23 25
- Nova Gorica µg/m3 31 28 29
Suburban background µg/m3 27 26 26
- Trbovlje* µg/m3 38 33 34
- Pesje µg/m3 20 22 22
- Škale µg/m3 22 24 23
Urban-traffic type µg/m3 39 33 35
- Maribor center* µg/m3 34 30 33
- Zagorje* µg/m3 44 36 36
- EIS Celje µg/m3 np np np
Rural/Agricultural type µg/m3 30 28 26
- Vnajnarje* µg/m3 np 23 20
- Prapretno µg/m3 29 31 29
- Murska Sobota-Rakičan µg/m3 30 29 30
Rural/Industrial type µg/m3 24 22 20
- Morsko* µg/m3 22 20 19
- Gorenje Polje* µg/m3 26 23 20
Rural type/natural background µg/m3 16 16 19
- Iskrba* µg/m3 16 16 19
Figure ZR08-3: Gibanje povprečne letne koncentracije PM2.5 (letna mejna vrednost je 25 µg/m3)
Sources: 

Zbirka podatkov avtomatskih meritev državne mreže za spremljanje kakovosti zraka (DMKZ), Agencija Republike Slovenije za okolje, 2009

Show data
2005 2006 2007 2008 2009 2010
Urban background
- Ljubljana Bežigrad µg/m3 28 29 25 24 np np
- Ljubljana BF µg/m3 np np np np 18 22
- Maribor Vrbanski plato µg/m3 np np np np 20 22
Urban-traffic type
- Maribor center µg/m3 28 31 27 23 22 24
Rural background
- Iskrba µg/m3 15 13 10 11 12 12

Goals

In the Decree on Sulphur Dioxide, Nitrogen Oxides, Particulate Matter and Lead in Ambient Air (OJ RS No 52/02), Slovenian domestic legislation was brought in line with the provisions of the EU Directive (1999/30/EC), which determines the 24-hour limit concentration value at 50 µg/m3, which is not to be exceeded more than 35 times per calendar year, and annual limit value at 40 µg/m3.


Measurements of particlulate matter (PM10) concentration levels in several urban areas came into practice with the introduction of a new air quality monitoring network (i.e. PHARE monitoring network) in March 2001. As is clearly evident from Figure ZR8-1, particulate matter poses a serious problem not only in Slovenian urban areas but also throughout Europe. In 2002, 24-hour limit values were exceeded more than 35 times per calendar year at five monitoring sites. Since the latter are mainly placed in heavy traffic locations, emissions from traffic bear a significant influence on particulate matter concentration levels in ambient air.


The data for Slovenia are taken from the Automatic Air Quality Measurement Database (ANAS) managed by the Monitoring Office (Environmental Agency of the Republic of Slovenia). The database is updated monthly; the data are available in their entirety upon the completion of final annual review.

Following the Guidance to member states on PM10 monitoring and intercomparisons with reference method (14 September 2004) the PM10 concentration values for 2002 include factor 1.3.


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