City report · Czechia
Ostrava Air quality today
Air quality in Ostrava currently reads AQI 72 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 72
Moderate
- PM2.5, fine particles (µg/m³)
- 20.2
- tree cover
- 40.0%
- trees in this area
- 125K
- more trees needed
- 0
Measured across a 2 km radius around Moravská Ostrava a Přívoz, Czechia (12.57 km²), from a satellite image of Sep 8, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Ostrava · AQI 72 (Moderate)
Ostrava's tree count comes to 125,412 trees across 12.54 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Ostrava today: AQI 72, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 15:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Ostrava-Ceskobratrsk, Moravskoslezsky, Czech Republic, 800 m away · median of 6 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
20.2
PM10
30.2
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Czech Hydrometeorological Institute (Český hydrometeorologický ústav)
- 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 Ostrava's daily AQI at 110 on average, from 79 on Nov 10 to an hourly peak of 170 on Nov 7.
Where Ostrava stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Ostrava: Healthy tree cover
40.0% tree cover against a 30% healthy-neighborhood target, across 12.54 km² of land.
Trees in this area
125,412
Target trees
125,412
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Ostrava lost?
Since 2001, the area within 10 km of Ostrava has lost about 587 hectares of forest (about 820 football pitches): 7.2% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 115 hectares (20%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area about 6 km north of the city center.
- Forest lost since 2001
- 587 haabout 820 football pitches
- Share of its forest
- 7.2%of what there was in 2000
- Cleared for good
- 115 hadeforestation: turned into farms, mines or towns
The worst year was 2005, when about 145 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 | under 1 ha | 1 ha |
| 2002 | 4 ha | 5 ha | 8 ha |
| 2003 | under 1 ha | 2 ha | 3 ha |
| 2004 | 2 ha | 1 ha | 3 ha |
| 2005 | 10 ha | 135 ha | 145 ha |
| 2006 | 6 ha | 8 ha | 14 ha |
| 2007 | 2 ha | 8 ha | 10 ha |
| 2008 | 7 ha | 38 ha | 44 ha |
| 2009 | 8 ha | 12 ha | 20 ha |
| 2010 | 15 ha | 101 ha | 116 ha |
| 2011 | 3 ha | 7 ha | 10 ha |
| 2012 | 5 ha | 39 ha | 44 ha |
| 2013 | 3 ha | 4 ha | 8 ha |
| 2014 | 3 ha | 8 ha | 11 ha |
| 2015 | 3 ha | 4 ha | 7 ha |
| 2016 | 6 ha | 25 ha | 31 ha |
| 2017 | 11 ha | 12 ha | 23 ha |
| 2018 | 2 ha | 8 ha | 10 ha |
| 2019 | 6 ha | 8 ha | 13 ha |
| 2020 | 2 ha | 8 ha | 10 ha |
| 2021 | 3 ha | 9 ha | 12 ha |
| 2022 | 5 ha | 13 ha | 17 ha |
| 2023 | 4 ha | 7 ha | 11 ha |
| 2024 | 2 ha | 4 ha | 6 ha |
| 2025 | 5 ha | 6 ha | 11 ha |
What is causing deforestation around Ostrava?
- Loggingcan grow back78% · 458 ha
- Towns and roadscleared for good16% · 95 ha
- Mining and energycleared for good3.5% · 20 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
- 14,600 ha
- Forest in 2020
- 15,100 ha
- Overall change
- +448 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Ostrava grew from about 14,600 hectares to 15,100 hectares, a net gain of about 448 hectares (+3.1%). New forest grew on about 598 hectares, while 151 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 Ostrava
Same 2 km radius, same index — so they compare directly.
- Rybnik34.6 km
Poland
- Tree cover
- 42%
- Air quality
- 79
- Bielsko-Biala54.9 km
Poland
- Tree cover
- 42%
- Air quality
- 84
- Gliwice58.7 km
Poland
- Tree cover
- 44%
- Air quality
- 90
- Tychy59.4 km
Poland
- Tree cover
- 44%
- Air quality
- 115
- Ruda Śląska62.5 km
Poland
- Tree cover
- 57%
- Air quality
- 108
- Zabrze65.3 km
Poland
- Tree cover
- 42%
- Air quality
- 108
Also compared:Ostrava vs PragueOstrava vs Brno
Build your own
Compare Ostrava with anywhere
This place
Ostrava
Use this data
Put Ostrava's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Ostrava
What is the air quality (AQI) in Ostrava right now?
The latest reading for Ostrava shows an AQI of 72 (Moderate), measured Nov 11, 15:00 local time by 6 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Ostrava-Ceskobratrsk, Moravskoslezsky, Czech Republic, 800 m away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Ostrava today?
At AQI 72 (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 Ostrava been like this week?
Over the last 7 days, the CAMS air-quality model put Ostrava's daily AQI at 110 on average, from 79 on Nov 10 to an hourly peak of 170 on Nov 7. On 5 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Ostrava lost since 2001?
Since 2001, the area within 10 km of Ostrava has lost about 587 hectares of forest (about 820 football pitches): 7.2% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 115 hectares (20%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Ostrava grew from about 14,600 hectares to 15,100 hectares, a net gain of about 448 hectares (+3.1%). New forest grew on about 598 hectares, while 151 hectares were lost.
What is the tree count in Ostrava?
Ostrava has an estimated 125,412 trees across the 12.54 km² of land measured — 40.0% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Ostrava need?
Ostrava has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Ostrava's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Moravská Ostrava a Přívoz, 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 Moravská Ostrava a Přívoz; the tree count is an estimate derived from that cover.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same air-quality and tree-cover breakdown.
Check my address