City report · Silesia, Poland
Bielsko-Biala Air quality today
Air quality in Bielsko-Biala currently reads AQI 98 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 98
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 34.4
- tree cover
- 42.4%
- trees in this area
- 133K
- more trees needed
- 0
Measured across a 2 km radius around Bielsko-Biala, Poland (12.57 km²), from a satellite image of Sep 8, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Bielsko-Biala · AQI 98 (Moderate)
Bielsko-Biala's tree count comes to 133,204 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Bielsko-Biala today: AQI 98, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Bielsko-Biała, ul. Partyzantów, 2.3 km away · median of 2 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
34.4
PM10
31.6
NO₂
39.0
O₃
18.9
SO₂
3.5
CO
553.0
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 Bielsko-Biala's daily AQI at 109 on average, from 82 on Nov 10 to an hourly peak of 189 on Nov 6.
Where Bielsko-Biala stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Bielsko-Biala: Healthy tree cover
42.4% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
133,204
Target trees
133,204
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Bielsko-Biala lost?
Since 2001, the area within 10 km of Bielsko-Biala has lost about 692 hectares of forest (about 970 football pitches): 5.2% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 115 hectares (17%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km southwest of the city center.
- Forest lost since 2001
- 692 haabout 970 football pitches
- Share of its forest
- 5.2%of what there was in 2000
- Cleared for good
- 115 hadeforestation: turned into farms, mines or towns
The worst year was 2005, when about 117 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 | 2 ha | 3 ha |
| 2002 | 2 ha | 7 ha | 9 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | 5 ha | 6 ha |
| 2005 | 3 ha | 114 ha | 117 ha |
| 2006 | 1 ha | 3 ha | 4 ha |
| 2007 | 2 ha | 46 ha | 48 ha |
| 2008 | 2 ha | 44 ha | 46 ha |
| 2009 | 13 ha | 14 ha | 27 ha |
| 2010 | 5 ha | 38 ha | 43 ha |
| 2011 | 7 ha | 13 ha | 20 ha |
| 2012 | 2 ha | 9 ha | 11 ha |
| 2013 | 2 ha | 10 ha | 11 ha |
| 2014 | 2 ha | 27 ha | 29 ha |
| 2015 | under 1 ha | 14 ha | 15 ha |
| 2016 | 2 ha | 33 ha | 35 ha |
| 2017 | 7 ha | 35 ha | 42 ha |
| 2018 | 5 ha | 44 ha | 49 ha |
| 2019 | 1 ha | 7 ha | 9 ha |
| 2020 | 12 ha | 27 ha | 39 ha |
| 2021 | 3 ha | 30 ha | 33 ha |
| 2022 | 5 ha | 17 ha | 22 ha |
| 2023 | 35 ha | 20 ha | 55 ha |
| 2024 | 3 ha | 9 ha | 12 ha |
| 2025 | under 1 ha | 9 ha | 10 ha |
What is causing deforestation around Bielsko-Biala?
- Loggingcan grow back80% · 556 ha
- Towns and roadscleared for good15% · 105 ha
- Farms, pasture and plantationscleared for good1.6% · 11 ha
Also: 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
- 18,500 ha
- Forest in 2020
- 18,600 ha
- Overall change
- +125 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Bielsko-Biala stayed about the same size, at about 18,600 hectares: new forest grew on about 239 hectares, and about 114 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 Bielsko-Biala
Same 2 km radius, same index — so they compare directly.
- Tychy35.5 km
Poland
- Tree cover
- 44%
- Air quality
- 115
- Rybnik47.3 km
Poland
- Tree cover
- 42%
- Air quality
- 74
- Katowice48.6 km
Poland
- Tree cover
- 27%
- Air quality
- 115
- Ruda Śląska50.3 km
Poland
- Tree cover
- 57%
- Air quality
- 108
- Ostrava54.9 km
Czechia
- Tree cover
- 40%
- Air quality
- 84
- Dąbrowa Górnicza58.0 km
Poland
- Tree cover
- 44%
- Air quality
- 115
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Frequently asked
Questions about Bielsko-Biala
What is the air quality (AQI) in Bielsko-Biala right now?
The latest reading for Bielsko-Biala shows an AQI of 98 (Moderate), measured Nov 11, 17:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Bielsko-Biała, ul. Partyzantów, 2.3 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Bielsko-Biala today?
At AQI 98 (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 Bielsko-Biala been like this week?
Over the last 7 days, the CAMS air-quality model put Bielsko-Biala's daily AQI at 109 on average, from 82 on Nov 10 to an hourly peak of 189 on Nov 6. On 5 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Bielsko-Biala lost since 2001?
Since 2001, the area within 10 km of Bielsko-Biala has lost about 692 hectares of forest (about 970 football pitches): 5.2% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 115 hectares (17%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Bielsko-Biala stayed about the same size, at about 18,600 hectares: new forest grew on about 239 hectares, and about 114 hectares were lost.
What is the tree count in Bielsko-Biala?
Bielsko-Biala has an estimated 133,204 trees across the 12.57 km² measured — 42.4% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Bielsko-Biala need?
Bielsko-Biala has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Bielsko-Biala's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Bielsko-Biala, 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 Bielsko-Biala; the tree count is an estimate derived from that cover.
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