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Key message
Neutral

Measurements of particle number concentration of ultrafine particles in ambient air in Ljubljana in period May 2012 -April 2014 is comparable to concentrations in other four European cities. Exposure to ultra-fine particles in the indoor air is roughly comparable or even slightly higher than exposure to ultra-fine particles in ambient air.


Charts

Figure ZD30-1: Particle number concentration (10-100 nm) in ambient air, cities in the UFIREG projects, from May 2012 to April 2014
Sources: 

UFIREG project, 2014

Figure ZD30-2: Fluctuations in the number of ultra-fine particles in ambient air compared to the seasons, cities in the UFIREG projects, from May 2012 to April 2014
Sources: 

UFIREG project, 2014

Chart note: 

Footnote 1: Chernivtsi, Ukraine from January 2013 to December 2014.

Footnote 2: The median is shown as the black line.

Figure ZD30-3: Average concentrations of the number of ultra-fine particles in ambient air, Copenhagen, 2001-2011
Sources: 

The Danish Environmental Protection Agency, 2015

Figure ZD30-4: Particle levels (number concentrations) measured in a test chamber during different activities in the indoor environment
Sources: 

The Danish Environmental Protection Agency; Afshari et al., 2005

Show data

Ultrafine particles source

Cmax (particles/cm3)

Flat iron (without steam) on a cotton sheet

550

Flat iron (with steam) on a cotton sheet

7200

Air-freshener spray

29900

Scented candles

69600

Pure wax candle

241500

Electric stove

111500

Radiator

218400

Vacuum cleaner with full bag

21400

Vacuum cleaner (motor) without bag

38300

Cigarette

213300

Gas stove

79600

Heater

116800

Frying meat

150900

Figure ZD30-5: Contributions of various activities to total daily exposure to ultra-fine particles in the interior air
Sources: 

The Danish Environmental Protection Agency; Bekö et al., 2013



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