City report · São Paulo, Brazil
Cotia Air quality today
Air quality in Cotia currently reads AQI 51 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 51
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 9.1
- tree cover
- 43.8%
- trees in this area
- 138K
- more trees needed
- 0
Measured across a 2 km radius around Vila Sao Francisco de Assis, Cotia - SP, Brazil (12.57 km²), from a satellite image of Nov 3, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Cotia · AQI 51 (Moderate)
Cotia's tree count comes to 137,602 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 Cotia today: AQI 51, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 13:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Carapicuíba, São Paulo, Brazil, 11.7 km away · median of 7 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
9.1
PM10
32.4
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, CETESB - Companhia Ambiental do Estado de São Paulo
- 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 Cotia's daily AQI at 60 on average, from 30 on Nov 8 to an hourly peak of 106 on Nov 5.
Where Cotia stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Cotia: Healthy tree cover
43.8% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
137,602
Target trees
137,602
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Cotia lost?
Since 2001, the area within 10 km of Cotia has lost about 1,860 hectares of forest (about 2,600 football pitches): 12% of the forest it had in 2000. Most of it (96%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area about 3 km southwest of the city center.
- Forest lost since 2001
- 1,860 haabout 2,600 football pitches
- Share of its forest
- 12%of what there was in 2000
- Cleared for good
- 1,780 hadeforestation: turned into farms, mines or towns
Forest loss is speeding up: about 82 hectares a year in 2021–2025, up from 64 hectares a year in 2016–2020. The worst year was 2007, when about 199 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 | 45 ha | 1 ha | 46 ha |
| 2002 | 41 ha | 1 ha | 42 ha |
| 2003 | 60 ha | under 1 ha | 60 ha |
| 2004 | 55 ha | 4 ha | 58 ha |
| 2005 | 72 ha | 3 ha | 75 ha |
| 2006 | 60 ha | under 1 ha | 60 ha |
| 2007 | 188 ha | 11 ha | 199 ha |
| 2008 | 86 ha | 2 ha | 88 ha |
| 2009 | 132 ha | 2 ha | 134 ha |
| 2010 | 102 ha | 4 ha | 106 ha |
| 2011 | 107 ha | 2 ha | 109 ha |
| 2012 | 37 ha | 2 ha | 39 ha |
| 2013 | 32 ha | 4 ha | 36 ha |
| 2014 | 48 ha | 3 ha | 51 ha |
| 2015 | 19 ha | 5 ha | 24 ha |
| 2016 | 29 ha | 5 ha | 34 ha |
| 2017 | 110 ha | 4 ha | 114 ha |
| 2018 | 34 ha | under 1 ha | 35 ha |
| 2019 | 67 ha | 1 ha | 69 ha |
| 2020 | 70 ha | under 1 ha | 71 ha |
| 2021 | 112 ha | 2 ha | 114 ha |
| 2022 | 69 ha | 1 ha | 70 ha |
| 2023 | 72 ha | 4 ha | 77 ha |
| 2024 | 73 ha | 7 ha | 80 ha |
| 2025 | 65 ha | 7 ha | 71 ha |
What is causing deforestation around Cotia?
- Towns and roadscleared for good87% · 1,620 ha
- Farms, pasture and plantationscleared for good9% · 168 ha
- Loggingcan grow back3.7% · 69 ha
Also: storms, floods and other natural causes, 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
- 18,100 ha
- Forest in 2020
- 17,300 ha
- Overall change
- −793 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Cotia shrank from about 18,100 hectares to 17,300 hectares, a net loss of about 793 hectares (−4.4%). New forest grew on about 382 hectares, but 1,180 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 Cotia
Same 2 km radius, same index — so they compare directly.
- Taboão da Serra13.2 km
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- Tree cover
- 18%
- Air quality
- 46
- Itapecerica da Serra14.4 km
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- Tree cover
- 62%
- Air quality
- 33
- Osasco15.2 km
Brazil
- Tree cover
- 13%
- Air quality
- 56
- Santana de Parnaíba17.8 km
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- Tree cover
- 50%
- Air quality
- 56
- São Paulo29.5 km
Brazil
- Tree cover
- 11%
- Air quality
- 55
- Caieiras32.3 km
Brazil
- Tree cover
- 68%
- Air quality
- 46
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Frequently asked
Questions about Cotia
What is the air quality (AQI) in Cotia right now?
The latest reading for Cotia shows an AQI of 51 (Moderate), measured Nov 11, 13:00 local time by 7 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Carapicuíba, São Paulo, Brazil, 11.7 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Cotia today?
At AQI 51 (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 Cotia been like this week?
Over the last 7 days, the CAMS air-quality model put Cotia's daily AQI at 60 on average, from 30 on Nov 8 to an hourly peak of 106 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Cotia lost since 2001?
Since 2001, the area within 10 km of Cotia has lost about 1,860 hectares of forest (about 2,600 football pitches): 12% of the forest it had in 2000. Most of it (96%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss is speeding up: about 82 hectares a year in 2021–2025, up from 64 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Cotia shrank from about 18,100 hectares to 17,300 hectares, a net loss of about 793 hectares (−4.4%). New forest grew on about 382 hectares, but 1,180 hectares were lost.
What is the tree count in Cotia?
Cotia has an estimated 137,602 trees across the 12.57 km² measured — 43.8% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Cotia need?
Cotia has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Cotia's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Vila Sao Francisco de Assis, 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 Vila Sao Francisco de Assis; the tree count is an estimate derived from that cover.
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