City report · Romania
Cluj-Napoca Air quality today
Air quality in Cluj-Napoca currently reads AQI 55 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 55
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 11.3
- tree cover
- 26.5%
- trees in this area
- 83.2K
- more trees needed
- 11.0K
Measured across a 2 km radius around Andrei Mureșanu, Cluj-Napoca, Romania (12.57 km²), from a satellite image of Sep 19, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Cluj-Napoca · AQI 55 (Moderate)
Cluj-Napoca's tree count comes to 83,169 trees across 12.56 km² of land, 3 points below the 30% tree-cover level considered healthy for this area, so roughly 10,985 more trees would close the gap.
Air quality detail
Air quality in Cluj-Napoca today: AQI 55, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 18:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · CJ-2, 1 km away · median of 4 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
11.3
PM10
15.2
NO₂
35.5
O₃
41.1
SO₂
8.4
CO
663.3
Data: OpenAQ · EEA
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Cluj-Napoca's daily AQI at 74 on average, from 58 on Nov 6 to an hourly peak of 129 on Nov 9.
Where Cluj-Napoca stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Cluj-Napoca: Below target
26.5% tree cover against a 30% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
83,169
Target trees
94,154
More trees needed
10,985
CO₂ if planted / yr
241.7 t
Deforestation · 2001–2025
How much forest has Cluj-Napoca lost?
Since 2001, the area within 10 km of Cluj-Napoca has lost about 240 hectares of forest (about 340 football pitches): 3.3% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 93 hectares (39%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 240 haabout 340 football pitches
- Share of its forest
- 3.3%of what there was in 2000
- Cleared for good
- 93 hadeforestation: turned into farms, mines or towns
The worst year was 2007, when about 20 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | 7 ha | 7 ha |
| 2002 | 1 ha | 9 ha | 11 ha |
| 2003 | 2 ha | 9 ha | 11 ha |
| 2004 | 6 ha | 12 ha | 18 ha |
| 2005 | under 1 ha | 2 ha | 2 ha |
| 2006 | under 1 ha | 7 ha | 7 ha |
| 2007 | 13 ha | 7 ha | 20 ha |
| 2008 | 18 ha | 2 ha | 20 ha |
| 2009 | 9 ha | 5 ha | 14 ha |
| 2010 | under 1 ha | 3 ha | 4 ha |
| 2011 | 3 ha | 5 ha | 8 ha |
| 2012 | 6 ha | 7 ha | 13 ha |
| 2013 | 3 ha | 5 ha | 7 ha |
| 2014 | 7 ha | 12 ha | 19 ha |
| 2015 | 3 ha | 10 ha | 13 ha |
| 2016 | 2 ha | 7 ha | 9 ha |
| 2017 | 3 ha | 6 ha | 9 ha |
| 2018 | 3 ha | 3 ha | 6 ha |
| 2019 | under 1 ha | 6 ha | 6 ha |
| 2020 | 4 ha | 1 ha | 5 ha |
| 2021 | under 1 ha | 6 ha | 6 ha |
| 2022 | 3 ha | 8 ha | 11 ha |
| 2023 | under 1 ha | 4 ha | 4 ha |
| 2024 | 4 ha | 3 ha | 7 ha |
| 2025 | under 1 ha | 2 ha | 2 ha |
What is causing deforestation around Cluj-Napoca?
- Loggingcan grow back58% · 139 ha
- Towns and roadscleared for good37% · 89 ha
- Farms, pasture and plantationscleared for good1.3% · 3 ha
Also: mining and energy, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Forest gained and lost, 2000–2020
- Forest in 2000
- 7,650 ha
- Forest in 2020
- 7,680 ha
- Overall change
- +30 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Cluj-Napoca stayed about the same size, at about 7,680 hectares: new forest grew on about 140 hectares, and about 109 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city center, a wider area than the report above, because forest is usually lost at a city's edges.
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. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
In the same region
Measured cities near Cluj-Napoca
Same 2 km radius, same index — so they compare directly.
- Baia Mare99.1 km
Romania
- Tree cover
- 35%
- Air quality
- 55
- Sibiu115.5 km
Romania
- Tree cover
- 12%
- Air quality
- 45
- Satu Mare127.6 km
Romania
- Tree cover
- 15%
- Air quality
- 62
- Oradea131.5 km
Romania
- Tree cover
- 10%
- Air quality
- 61
- Debrecen171.9 km
Hungary
- Tree cover
- 30%
- Air quality
- 104
Also compared:Cluj-Napoca vs BucharestCluj-Napoca vs IaşiCluj-Napoca vs ConstanţaCluj-Napoca vs Braşov
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Frequently asked
Questions about Cluj-Napoca
What is the air quality (AQI) in Cluj-Napoca right now?
The latest reading for Cluj-Napoca shows an AQI of 55 (Moderate), measured Nov 11, 18:00 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is CJ-2, 1 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Cluj-Napoca today?
At AQI 55 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Cluj-Napoca been like this week?
Over the last 7 days, the CAMS air-quality model put Cluj-Napoca's daily AQI at 74 on average, from 58 on Nov 6 to an hourly peak of 129 on Nov 9. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Cluj-Napoca lost since 2001?
Since 2001, the area within 10 km of Cluj-Napoca has lost about 240 hectares of forest (about 340 football pitches): 3.3% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 93 hectares (39%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Cluj-Napoca stayed about the same size, at about 7,680 hectares: new forest grew on about 140 hectares, and about 109 hectares were lost.
What is the tree count in Cluj-Napoca?
Cluj-Napoca has an estimated 83,169 trees across the 12.56 km² of land measured — 26.5% tree cover, 3 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Cluj-Napoca need?
Cluj-Napoca needs roughly 10,985 more trees to close a 3-point shortfall against its 30% tree-cover target — about 241.7 t of extra CO₂ absorbed per year once grown.
How are Cluj-Napoca's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Andrei Mureșanu, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Andrei Mureșanu; the tree count is an estimate derived from that cover.
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