City report · São Paulo, Brazil
Jacareí Air quality today
Air quality in Jacareí currently reads AQI 23 (Good): Air quality is satisfactory for everyone.
AQI 23
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 4.1
- tree cover
- 26.9%
- trees in this area
- 84.1K
- more trees needed
- 9.7K
Measured across a 2 km radius around Vila Denise, Jacareí - 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.
Jacareí · AQI 23 (Good)
Jacareí's tree count comes to 84,086 trees across 12.51 km² of land, 3 points below the 30% tree-cover level considered healthy for this area, so roughly 9,690 more trees would close the gap.
Air quality detail
Air quality in Jacareí today: AQI 23, 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.José Campos-Jd.Satélite, São Paulo, Brazil, 11.9 km away
Health signal
Air quality is satisfactory for everyone.
PM2.5
4.1
PM10
20.5
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 Jacareí's daily AQI at 44 on average, from 25 on Nov 10 to an hourly peak of 87 on Nov 5.
Where Jacareí stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Jacareí: Below target
26.9% tree cover against a 30% healthy-neighborhood target, across 12.51 km² of land.
Trees in this area
84,086
Target trees
93,776
More trees needed
9,690
CO₂ if planted / yr
213.2 t
Deforestation · 2001–2025
How much forest has Jacareí lost?
Since 2001, the area within 10 km of Jacareí has lost about 1,050 hectares of forest (about 1,500 football pitches): 15% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 186 hectares (18%) 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 south of the city center.
- Forest lost since 2001
- 1,050 haabout 1,500 football pitches
- Share of its forest
- 15%of what there was in 2000
- Cleared for good
- 186 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 37 hectares a year in 2021–2025, down from 72 hectares a year in 2016–2020. The worst year was 2016, when about 221 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 | 17 ha | 18 ha | 35 ha |
| 2002 | 5 ha | 96 ha | 100 ha |
| 2003 | 9 ha | 47 ha | 56 ha |
| 2004 | 4 ha | 6 ha | 10 ha |
| 2005 | 6 ha | 6 ha | 12 ha |
| 2006 | under 1 ha | 3 ha | 3 ha |
| 2007 | 50 ha | 10 ha | 60 ha |
| 2008 | 4 ha | 39 ha | 43 ha |
| 2009 | 4 ha | 53 ha | 56 ha |
| 2010 | 8 ha | 6 ha | 13 ha |
| 2011 | 3 ha | 31 ha | 34 ha |
| 2012 | 5 ha | 10 ha | 15 ha |
| 2013 | 1 ha | 5 ha | 6 ha |
| 2014 | 18 ha | 11 ha | 30 ha |
| 2015 | 2 ha | 27 ha | 29 ha |
| 2016 | 3 ha | 218 ha | 221 ha |
| 2017 | 13 ha | 49 ha | 62 ha |
| 2018 | 11 ha | 25 ha | 36 ha |
| 2019 | 2 ha | 13 ha | 15 ha |
| 2020 | 2 ha | 24 ha | 27 ha |
| 2021 | 3 ha | 6 ha | 8 ha |
| 2022 | 2 ha | 4 ha | 6 ha |
| 2023 | 4 ha | 20 ha | 24 ha |
| 2024 | 6 ha | 10 ha | 16 ha |
| 2025 | 5 ha | 128 ha | 133 ha |
What is causing deforestation around Jacareí?
- Loggingcan grow back81% · 848 ha
- Farms, pasture and plantationscleared for good12% · 129 ha
- Towns and roadscleared for good5.3% · 56 ha
Also: storms, floods and other natural causes, mining and energy, 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
- 8,550 ha
- Forest in 2020
- 9,310 ha
- Overall change
- +759 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Jacareí grew from about 8,550 hectares to 9,310 hectares, a net gain of about 759 hectares (+8.9%). New forest grew on about 1,080 hectares, while 319 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 Jacareí
Same 2 km radius, same index — so they compare directly.
- São José dos Campos16.2 km
Brazil
- Tree cover
- 48%
- Air quality
- 23
- Mogi das Cruzes33.2 km
Brazil
- Tree cover
- 17%
- Air quality
- 25
- Caçapava34.9 km
Brazil
- Tree cover
- 26%
- Air quality
- 57
- Itaquaquecetuba43.9 km
Brazil
- Tree cover
- 17%
- Air quality
- 25
- Taubaté52.2 km
Brazil
- Tree cover
- 17%
- Air quality
- 72
- Guarulhos60.5 km
Brazil
- Tree cover
- 12%
- Air quality
- 66
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Frequently asked
Questions about Jacareí
What is the air quality (AQI) in Jacareí right now?
The latest reading for Jacareí shows an AQI of 23 (Good), measured Nov 11, 12:00 local time by the S.José Campos-Jd.Satélite, São Paulo, Brazil ground monitoring station, 11.9 km away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Jacareí today?
At AQI 23 (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 Jacareí been like this week?
Over the last 7 days, the CAMS air-quality model put Jacareí's daily AQI at 44 on average, from 25 on Nov 10 to an hourly peak of 87 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 Jacareí lost since 2001?
Since 2001, the area within 10 km of Jacareí has lost about 1,050 hectares of forest (about 1,500 football pitches): 15% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 186 hectares (18%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 37 hectares a year in 2021–2025, down from 72 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Jacareí grew from about 8,550 hectares to 9,310 hectares, a net gain of about 759 hectares (+8.9%). New forest grew on about 1,080 hectares, while 319 hectares were lost.
What is the tree count in Jacareí?
Jacareí has an estimated 84,086 trees across the 12.51 km² of land measured — 26.9% tree cover, 3 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Jacareí need?
Jacareí needs roughly 9,690 more trees to close a 3-point shortfall against its 30% tree-cover target — about 213.2 t of extra CO₂ absorbed per year once grown.
How are Jacareí's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Vila Denise, 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 Denise; the tree count is an estimate derived from that cover.
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