Ljubljana
2 km around Ljubljana
Air quality now
AQI 66
38.1%
tree cover
Healthy tree cover
Europe · air quality report · 5 cities
Slovenia air quality today The AQI right now, city by city
Right now the 5 cities Airleaf measures in Slovenia average AQI 52 (moderate). The worst air is in Ljubljana, at AQI 66, and the cleanest in Novo Mesto, at AQI 41.
At ground stations alone, which measure rather than estimate, the average is AQI 52 across 5 cities. None of the 5 measured cities is over AQI 100 today, and 60% have Good air.
Average right now
AQI 52
Moderate
US EPA index, across 5 cities
- cities measured
- 5
- worst air: Ljubljana
- 66
- cleanest air: Novo Mesto
- 41
- average tree cover
- 33.2%
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Slovenia · average AQI 52
Air quality right now in all 5 cities in Slovenia
Moderate
Maribor
2 km around Maribor
Air quality now
AQI 59
27.1%
tree cover
8.7K more trees would reach 30% tree cover
Celje
2 km around Celje
Air quality now
AQI 49
43.8%
tree cover
Healthy tree cover
Koper
2 km around 6000 Koper
Air quality now
AQI 46
16.6%
tree cover
25.6K more trees would reach 30% tree cover
Novo Mesto
2 km around 8000 Novo Mesto
Air quality now
AQI 41
40.5%
tree cover
Healthy tree cover
Across the country
How clean is the air across Slovenia today?
None of the 5 measured cities is over AQI 100 today, and 60% have Good air. Unusually sensitive people should consider limiting long outdoor exertion.
5 measured cities
- Good3 (60%)
- Moderate2 (40%)
Every measured city, including model estimates where no ground station is near.
Against everywhere else
How does Slovenia compare with other countries?
Right now the cities of Slovenia average cleaner air than 49% of the 171 countries Airleaf has enough cities to average, and more tree cover than 75%.
Cleaner air than…
- Slovenia
- Beats 49%
More tree cover than…
- Slovenia
- Beats 75%
See the most polluted and cleanest air rankings for every country.
Deforestation · 2001–2025
How much forest has Slovenia lost?
Since 2001, Slovenia has lost about 66,600 hectares of forest (about 93,000 football pitches): 5% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 4,880 hectares (7.3%) was deforestation: forest cleared for good for farms, mines or towns.
- Forest lost since 2001
- 66,600 haabout 93,000 football pitches
- Share of its forest
- 5%of what there was in 2000
- Cleared for good
- 4,880 hadeforestation: turned into farms, mines or towns
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 114 ha | 507 ha | 621 ha |
| 2002 | 120 ha | 612 ha | 732 ha |
| 2003 | 99 ha | 435 ha | 534 ha |
| 2004 | 171 ha | 1,120 ha | 1,290 ha |
| 2005 | 344 ha | 1,620 ha | 1,970 ha |
| 2006 | 237 ha | 1,030 ha | 1,270 ha |
| 2007 | 359 ha | 1,750 ha | 2,110 ha |
| 2008 | 332 ha | 1,540 ha | 1,870 ha |
| 2009 | 286 ha | 1,730 ha | 2,010 ha |
| 2010 | 200 ha | 1,240 ha | 1,440 ha |
| 2011 | 153 ha | 1,280 ha | 1,430 ha |
| 2012 | 115 ha | 804 ha | 919 ha |
| 2013 | 72 ha | 576 ha | 648 ha |
| 2014 | 203 ha | 5,230 ha | 5,430 ha |
| 2015 | 66 ha | 969 ha | 1,040 ha |
| 2016 | 312 ha | 5,120 ha | 5,430 ha |
| 2017 | 242 ha | 4,740 ha | 4,980 ha |
| 2018 | 238 ha | 8,000 ha | 8,240 ha |
| 2019 | 225 ha | 3,350 ha | 3,580 ha |
| 2020 | 170 ha | 3,760 ha | 3,930 ha |
| 2021 | 173 ha | 2,090 ha | 2,260 ha |
| 2022 | 124 ha | 2,890 ha | 3,010 ha |
| 2023 | 208 ha | 4,500 ha | 4,710 ha |
| 2024 | 165 ha | 3,620 ha | 3,780 ha |
| 2025 | 155 ha | 3,240 ha | 3,400 ha |
Forest loss is slowing down: about 3,430 hectares a year in 2021–2025, down from 5,230 hectares a year in 2016–2020. The worst year was 2018, when about 8,240 hectares of forest were lost.
What is causing deforestation in Slovenia?
- Loggingcan grow back87% · 57,900 ha
- Towns and roadscleared for good4.5% · 2,980 ha
- Wildfirescan grow back2.7% · 1,790 ha
Also: farms, pasture and plantations, storms, floods and other natural causes, mining and energy, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. How it's measured
Slovenia as a whole
61.8% of Slovenia was forested as of 2024, against a 30% benchmark. That already clears the benchmark — the city reports above show where cover is still thin locally. Source: World Bank (FAO).
Build your own
Compare Slovenia with another country
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Slovenia
Clean-air buying guides
Cleaner air at home in Slovenia
Picked by tested clean-air delivery rate (CADR), noise and running cost, from independent test labels. No brand pays to be listed.
- The best air purifiers for wildfire smoke and smog
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Good HEPA air purifiers under $200 at the makers' own prices, compared on verified clean air, room size and what the filters cost each year.
- NIOSH-approved N95 masks for smoke and smog
NIOSH-approved N95 masks and P100 respirators for smog and smoke, and how to get the fit right. Cloth and surgical masks do little against PM2.5.
Frequently asked
Air quality in Slovenia: your questions answered
What is the air quality in Slovenia today?
Right now the 5 cities Airleaf measures in Slovenia average AQI 52 (moderate). The worst air is in Ljubljana, at AQI 66, and the cleanest in Novo Mesto, at AQI 41. At ground stations alone, which measure rather than estimate, the average is AQI 52 across 5 cities. None of the 5 measured cities is over AQI 100 today, and 60% have Good air.
Which city in Slovenia has the worst air right now?
Ljubljana, at AQI 66 (Moderate) on the US EPA index. Unusually sensitive people should consider limiting long outdoor exertion.
Which city in Slovenia has the cleanest air right now?
Novo Mesto, at AQI 41 (Good). Both lists rank current readings, from ground stations wherever Slovenia has at least three cities with one.
Is the air in Slovenia safe to breathe today?
It depends on the city. 3 cities are Good, 2 cities are Moderate. At the national average of AQI 52: Unusually sensitive people should consider limiting long outdoor exertion.
How much forest has Slovenia lost since 2001?
About 66,600 ha from 2001 to 2025, 5% of the forest it had in 2000, from the University of Maryland's yearly satellite maps of forest loss. 4,880 ha of it was cleared for good, for farms, mines or towns.
How does Airleaf measure air quality in Slovenia?
Each city's reading is the US EPA air quality index, from ground monitoring stations where one has reported recently nearby, and from the CAMS atmospheric model elsewhere; each city's report says which. Tree cover is measured over the same 2 km radius in every city, so the cities compare like for like.
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