City report · Greater Poland, Poland
Kalisz Air quality today
Air quality in Kalisz currently reads AQI 82 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 82
Moderate
- PM2.5, fine particles (µg/m³)
- 25.5
- tree cover
- 37.1%
- trees in this area
- 116K
- more trees needed
- 0
Measured across a 2 km radius around osiedle Śródmieście I, 62-800 Kalisz, Poland (12.57 km²), from a satellite image of Sep 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Kalisz · AQI 82 (Moderate)
Kalisz's tree count comes to 116,320 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 Kalisz today: AQI 82, 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 · Kalisz, ul. Wyszyńskiego, 3.2 km away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
25.5
PM10
28.4
NO₂
15.9
O₃
—
SO₂
6.0
CO
—
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 Kalisz's daily AQI at 97 on average, from 77 on Nov 6 to an hourly peak of 153 on Nov 9.
Where Kalisz stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Kalisz: Healthy tree cover
37.1% tree cover against a 30% healthy-neighborhood target, across 12.54 km² of land.
Trees in this area
116,320
Target trees
116,320
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Kalisz lost?
Since 2001, the area within 10 km of Kalisz has lost about 200 hectares of forest (about 280 football pitches): 9.8% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 9 hectares (4.6%) 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 northeast of the city center.
- Forest lost since 2001
- 200 haabout 280 football pitches
- Share of its forest
- 9.8%of what there was in 2000
- Cleared for good
- 9 hadeforestation: turned into farms, mines or towns
The worst year was 2023, when about 17 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 | 3 ha | 3 ha |
| 2002 | under 1 ha | 10 ha | 10 ha |
| 2003 | under 1 ha | 8 ha | 8 ha |
| 2004 | under 1 ha | 2 ha | 2 ha |
| 2005 | under 1 ha | 14 ha | 15 ha |
| 2006 | under 1 ha | 3 ha | 4 ha |
| 2007 | under 1 ha | 7 ha | 7 ha |
| 2008 | under 1 ha | 4 ha | 4 ha |
| 2009 | under 1 ha | 2 ha | 2 ha |
| 2010 | under 1 ha | 5 ha | 5 ha |
| 2011 | under 1 ha | 5 ha | 5 ha |
| 2012 | 1 ha | 7 ha | 8 ha |
| 2013 | under 1 ha | 2 ha | 2 ha |
| 2014 | under 1 ha | 14 ha | 15 ha |
| 2015 | under 1 ha | 8 ha | 8 ha |
| 2016 | under 1 ha | 7 ha | 7 ha |
| 2017 | under 1 ha | 12 ha | 12 ha |
| 2018 | under 1 ha | 11 ha | 11 ha |
| 2019 | 2 ha | 11 ha | 12 ha |
| 2020 | under 1 ha | 9 ha | 9 ha |
| 2021 | 1 ha | 9 ha | 11 ha |
| 2022 | under 1 ha | 7 ha | 8 ha |
| 2023 | under 1 ha | 17 ha | 17 ha |
| 2024 | under 1 ha | 6 ha | 7 ha |
| 2025 | under 1 ha | 9 ha | 9 ha |
What is causing deforestation around Kalisz?
- Loggingcan grow back90% · 181 ha
- Towns and roadscleared for good4.3% · 9 ha
- Unknown causescause unknown4.8% · 10 ha
Also: farms, pasture and plantations.
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
- 4,080 ha
- Forest in 2020
- 4,350 ha
- Overall change
- +273 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Kalisz grew from about 4,080 hectares to 4,350 hectares, a net gain of about 273 hectares (+6.7%). New forest grew on about 378 hectares, while 105 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 Kalisz
What is the air quality (AQI) in Kalisz right now?
The latest reading for Kalisz shows an AQI of 82 (Moderate), measured Nov 11, 16:00 local time by the Kalisz, ul. Wyszyńskiego ground monitoring station, 3.2 km away, via OpenAQ. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Kalisz today?
At AQI 82 (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 Kalisz been like this week?
Over the last 7 days, the CAMS air-quality model put Kalisz's daily AQI at 97 on average, from 77 on Nov 6 to an hourly peak of 153 on Nov 9. On 3 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Kalisz lost since 2001?
Since 2001, the area within 10 km of Kalisz has lost about 200 hectares of forest (about 280 football pitches): 9.8% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 9 hectares (4.6%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Kalisz grew from about 4,080 hectares to 4,350 hectares, a net gain of about 273 hectares (+6.7%). New forest grew on about 378 hectares, while 105 hectares were lost.
What is the tree count in Kalisz?
Kalisz has an estimated 116,320 trees across the 12.54 km² of land measured — 37.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Kalisz need?
Kalisz has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Kalisz's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near osiedle Śródmieście I, 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 osiedle Śródmieście I; the tree count is an estimate derived from that cover.
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