City report · Mazovia, Poland
Bielany Air quality today
Air quality in Bielany currently reads AQI 77 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 77
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 23.1
- tree cover
- 57.8%
- trees in this area
- 177K
- more trees needed
- 0
Measured across a 2 km radius around Wrzeciono, Warsaw, Warsaw, Poland (12.57 km²), from a satellite image of Sep 18, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Bielany · AQI 77 (Moderate)
Bielany's tree count comes to 176,863 trees across 12.24 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Bielany today: AQI 77, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 16:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Warszawa, ul. Kondratowicza, 7.3 km away · median of 3 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
23.1
PM10
26.0
NO₂
14.0
O₃
27.5
SO₂
1.9
CO
383.0
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 Bielany's daily AQI at 110 on average, from 73 on Nov 6 to an hourly peak of 178 on Nov 7.
Where Bielany stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Bielany: Healthy tree cover
57.8% tree cover against a 30% healthy-neighborhood target, across 12.24 km² of land.
Trees in this area
176,863
Target trees
176,863
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Bielany lost?
Since 2001, the area within 10 km of Bielany has lost about 363 hectares of forest (about 510 football pitches): 4% of the forest it had in 2000. Most of it (51%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km northeast of the city center.
- Forest lost since 2001
- 363 haabout 510 football pitches
- Share of its forest
- 4%of what there was in 2000
- Cleared for good
- 186 hadeforestation: turned into farms, mines or towns
The worst year was 2017, when about 42 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 | 12 ha | 10 ha | 22 ha |
| 2002 | 5 ha | 4 ha | 8 ha |
| 2003 | 11 ha | 10 ha | 21 ha |
| 2004 | 10 ha | 17 ha | 27 ha |
| 2005 | 11 ha | 6 ha | 17 ha |
| 2006 | 6 ha | 3 ha | 10 ha |
| 2007 | 15 ha | 12 ha | 27 ha |
| 2008 | 11 ha | 9 ha | 21 ha |
| 2009 | 8 ha | 5 ha | 13 ha |
| 2010 | 16 ha | 16 ha | 32 ha |
| 2011 | 14 ha | 8 ha | 21 ha |
| 2012 | 7 ha | 7 ha | 15 ha |
| 2013 | 2 ha | 6 ha | 8 ha |
| 2014 | under 1 ha | 4 ha | 4 ha |
| 2015 | under 1 ha | 8 ha | 9 ha |
| 2016 | 5 ha | 8 ha | 13 ha |
| 2017 | 17 ha | 25 ha | 42 ha |
| 2018 | 14 ha | under 1 ha | 15 ha |
| 2019 | 3 ha | under 1 ha | 4 ha |
| 2020 | 4 ha | 3 ha | 7 ha |
| 2021 | 1 ha | 3 ha | 4 ha |
| 2022 | under 1 ha | under 1 ha | 2 ha |
| 2023 | 10 ha | 8 ha | 17 ha |
| 2024 | 1 ha | 1 ha | 3 ha |
| 2025 | 2 ha | 3 ha | 5 ha |
What is causing deforestation around Bielany?
- Towns and roadscleared for good51% · 186 ha
- Loggingcan grow back44% · 160 ha
- Unknown causescause unknown4.5% · 16 ha
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
- 8,200 ha
- Forest in 2020
- 8,270 ha
- Overall change
- +69 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Bielany stayed about the same size, at about 8,270 hectares: new forest grew on about 371 hectares, and about 303 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
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Frequently asked
Questions about Bielany
What is the air quality (AQI) in Bielany right now?
The latest reading for Bielany shows an AQI of 77 (Moderate), measured Nov 11, 16:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Warszawa, ul. Kondratowicza, 7.3 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Bielany today?
At AQI 77 (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 Bielany been like this week?
Over the last 7 days, the CAMS air-quality model put Bielany's daily AQI at 110 on average, from 73 on Nov 6 to an hourly peak of 178 on Nov 7. On 4 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Bielany lost since 2001?
Since 2001, the area within 10 km of Bielany has lost about 363 hectares of forest (about 510 football pitches): 4% of the forest it had in 2000. Most of it (51%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Bielany stayed about the same size, at about 8,270 hectares: new forest grew on about 371 hectares, and about 303 hectares were lost.
What is the tree count in Bielany?
Bielany has an estimated 176,863 trees across the 12.24 km² of land measured — 57.8% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Bielany need?
Bielany has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Bielany's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Wrzeciono, 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 Wrzeciono; the tree count is an estimate derived from that cover.
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