City report · São Paulo, Brazil
São Caetano do Sul Air quality today
Air quality in São Caetano do Sul currently reads AQI 46 (Good): Air quality is satisfactory for everyone.
AQI 46
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 8.2
- tree cover
- 12.0%
- trees in this area
- 37.7K
- more trees needed
- 56.5K
Measured across a 2 km radius around Barcelona, São Caetano do Sul - 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.
São Caetano do Sul · AQI 46 (Good)
São Caetano do Sul's tree count comes to 37,699 trees across 12.57 km², 18 points below the 30% tree-cover level considered healthy for this area, so roughly 56,549 more trees would close the gap.
Air quality detail
Air quality in São Caetano do Sul today: AQI 46, Good
Main pollutant: PM2.5 · Observed Nov 11, 12:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · S.André-Capuava, São Paulo, Brazil, 6.3 km away · median of 4 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
8.2
PM10
17.3
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, CETESB - Companhia Ambiental do Estado de São Paulo
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put São Caetano do Sul's daily AQI at 60 on average, from 39 on Nov 8 to an hourly peak of 113 on Nov 6.
Where São Caetano do Sul stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in São Caetano do Sul: Critically low
12.0% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
37,699
Target trees
94,248
More trees needed
56,549
CO₂ if planted / yr
1,244 t
Deforestation · 2001–2025
How much forest has São Caetano do Sul lost?
Since 2001, the area within 10 km of São Caetano do Sul has lost about 81 hectares of forest (about 110 football pitches): 6.5% of the forest it had in 2000. Most of it (90%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 81 haabout 110 football pitches
- Share of its forest
- 6.5%of what there was in 2000
- Cleared for good
- 73 hadeforestation: turned into farms, mines or towns
The worst year was 2018, when about 11 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 | 2 ha | under 1 ha | 2 ha |
| 2002 | 2 ha | under 1 ha | 3 ha |
| 2003 | 2 ha | under 1 ha | 2 ha |
| 2004 | 4 ha | under 1 ha | 5 ha |
| 2005 | 2 ha | under 1 ha | 3 ha |
| 2006 | 1 ha | 2 ha | 3 ha |
| 2007 | 2 ha | 1 ha | 3 ha |
| 2008 | under 1 ha | 2 ha | 3 ha |
| 2009 | 4 ha | under 1 ha | 5 ha |
| 2010 | 5 ha | under 1 ha | 5 ha |
| 2011 | 2 ha | under 1 ha | 2 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | 5 ha | under 1 ha | 5 ha |
| 2016 | 4 ha | under 1 ha | 4 ha |
| 2017 | 10 ha | under 1 ha | 10 ha |
| 2018 | 11 ha | under 1 ha | 11 ha |
| 2019 | 10 ha | under 1 ha | 10 ha |
| 2020 | 2 ha | under 1 ha | 2 ha |
| 2021 | 1 ha | under 1 ha | 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around São Caetano do Sul?
- Towns and roadscleared for good90% · 73 ha
- Loggingcan grow back6.8% · 6 ha
- Unknown causescause unknown3.1% · 3 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
- 2,310 ha
- Forest in 2020
- 2,690 ha
- Overall change
- +376 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around São Caetano do Sul grew from about 2,310 hectares to 2,690 hectares, a net gain of about 376 hectares (+16%). New forest grew on about 456 hectares, while 80 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 São Caetano do Sul
Same 2 km radius, same index — so they compare directly.
- São Paulo12.1 km
Brazil
- Tree cover
- 11%
- Air quality
- 59
- Guarulhos17.9 km
Brazil
- Tree cover
- 12%
- Air quality
- 66
- Taboão da Serra24.5 km
Brazil
- Tree cover
- 18%
- Air quality
- 51
- Itaquaquecetuba25.7 km
Brazil
- Tree cover
- 17%
- Air quality
- 25
- Osasco26.5 km
Brazil
- Tree cover
- 13%
- Air quality
- 42
- Itapecerica da Serra32.1 km
Brazil
- Tree cover
- 62%
- Air quality
- 40
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Frequently asked
Questions about São Caetano do Sul
What is the air quality (AQI) in São Caetano do Sul right now?
The latest reading for São Caetano do Sul shows an AQI of 46 (Good), measured Nov 11, 12:00 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is S.André-Capuava, São Paulo, Brazil, 6.3 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in São Caetano do Sul today?
At AQI 46 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in São Caetano do Sul been like this week?
Over the last 7 days, the CAMS air-quality model put São Caetano do Sul's daily AQI at 60 on average, from 39 on Nov 8 to an hourly peak of 113 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around São Caetano do Sul lost since 2001?
Since 2001, the area within 10 km of São Caetano do Sul has lost about 81 hectares of forest (about 110 football pitches): 6.5% of the forest it had in 2000. Most of it (90%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around São Caetano do Sul grew from about 2,310 hectares to 2,690 hectares, a net gain of about 376 hectares (+16%). New forest grew on about 456 hectares, while 80 hectares were lost.
What is the tree count in São Caetano do Sul?
São Caetano do Sul has an estimated 37,699 trees across the 12.57 km² measured — 12.0% tree cover, 18 percentage points short of the 30% tree-cover target set for this area.
How many more trees does São Caetano do Sul need?
São Caetano do Sul needs roughly 56,549 more trees to close a 18-point shortfall against its 30% tree-cover target — about 1,244 t of extra CO₂ absorbed per year once grown.
How are São Caetano do Sul's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Barcelona, 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 Barcelona; the tree count is an estimate derived from that cover.
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