City report · Santa Catarina, Brazil
São José Air quality today
Air quality in São José currently reads AQI 39 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 39
Good
- PM2.5, fine particles (µg/m³)
- 7.9
- tree cover
- 24.6%
- trees in this area
- 43.1K
- more trees needed
- 9.5K
Measured across a 2 km radius around Centro, São José - SC, Brazil (12.57 km²), from a satellite image of Oct 20, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
São José · AQI 39 (Good)
São José's tree count comes to 43,124 trees across 7.01 km² of land, 5 points below the 30% tree-cover level considered healthy for this area, so roughly 9,466 more trees would close the gap.
Air quality detail
Air quality in São José today: AQI 39, Good
Main pollutant: PM2.5 · Observed Nov 11, 01:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Air quality is satisfactory for everyone.
PM2.5
7.9
PM10
12.6
NO₂
3.7
O₃
39.0
SO₂
0.6
CO
156.0
- 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 José's daily AQI at 34 on average, from 21 on Nov 7 to an hourly peak of 55 on Nov 8.
Where São José stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in São José: Below target
24.6% tree cover against a 30% healthy-neighborhood target, across 7.01 km² of land.
Trees in this area
43,124
Target trees
52,590
More trees needed
9,466
CO₂ if planted / yr
208.3 t
Deforestation · 2001–2025
How much forest has São José lost?
Since 2001, the area within 10 km of São José has lost about 956 hectares of forest (about 1,300 football pitches): 14% of the forest it had in 2000. Most of it (86%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from January 2017 of a 5 × 5 km area about 5 km northwest of the city center.
- Forest lost since 2001
- 956 haabout 1,300 football pitches
- Share of its forest
- 14%of what there was in 2000
- Cleared for good
- 821 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 25 hectares a year in 2021–2025, down from 52 hectares a year in 2016–2020. The worst year was 2016, when about 173 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 | 8 ha | 1 ha | 10 ha |
| 2002 | 17 ha | under 1 ha | 17 ha |
| 2003 | 36 ha | under 1 ha | 36 ha |
| 2004 | 39 ha | under 1 ha | 40 ha |
| 2005 | 61 ha | under 1 ha | 61 ha |
| 2006 | 80 ha | under 1 ha | 80 ha |
| 2007 | 54 ha | under 1 ha | 55 ha |
| 2008 | 36 ha | under 1 ha | 37 ha |
| 2009 | 16 ha | under 1 ha | 16 ha |
| 2010 | 60 ha | under 1 ha | 60 ha |
| 2011 | 42 ha | under 1 ha | 43 ha |
| 2012 | 16 ha | 2 ha | 19 ha |
| 2013 | 25 ha | under 1 ha | 25 ha |
| 2014 | 57 ha | under 1 ha | 57 ha |
| 2015 | 19 ha | under 1 ha | 19 ha |
| 2016 | 50 ha | 123 ha | 173 ha |
| 2017 | 33 ha | 2 ha | 35 ha |
| 2018 | 20 ha | under 1 ha | 20 ha |
| 2019 | 8 ha | under 1 ha | 8 ha |
| 2020 | 20 ha | 2 ha | 21 ha |
| 2021 | 25 ha | under 1 ha | 25 ha |
| 2022 | 25 ha | under 1 ha | 25 ha |
| 2023 | 36 ha | under 1 ha | 36 ha |
| 2024 | 14 ha | under 1 ha | 14 ha |
| 2025 | 24 ha | under 1 ha | 24 ha |
What is causing deforestation around São José?
- Towns and roadscleared for good78% · 748 ha
- Storms, floods and other natural causescan grow back11% · 103 ha
- Farms, pasture and plantationscleared for good7.6% · 72 ha
Also: logging, 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
- 6,570 ha
- Forest in 2020
- 6,200 ha
- Overall change
- −368 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around São José shrank from about 6,570 hectares to 6,200 hectares, a net loss of about 368 hectares (−5.6%). New forest grew on about 273 hectares, but 641 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 José
Same 2 km radius, same index — so they compare directly.
- Brusque64.0 km
Brazil
- Tree cover
- 47%
- Air quality
- 45
- Balneário Camboriú69.4 km
Brazil
- Tree cover
- 11%
- Air quality
- 52
- Itajaí78.7 km
Brazil
- Tree cover
- 15%
- Air quality
- 53
- Blumenau88.7 km
Brazil
- Tree cover
- 62%
- Air quality
- 38
- Tubarão101.8 km
Brazil
- Tree cover
- 18%
- Air quality
- 34
- Jaraguá do Sul132.8 km
Brazil
- Tree cover
- 45%
- Air quality
- 22
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Frequently asked
Questions about São José
What is the air quality (AQI) in São José right now?
The latest reading for São José shows an AQI of 39 (Good), observed Nov 11, 01:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in São José today?
At AQI 39 (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 José been like this week?
Over the last 7 days, the CAMS air-quality model put São José's daily AQI at 34 on average, from 21 on Nov 7 to an hourly peak of 55 on Nov 8. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around São José lost since 2001?
Since 2001, the area within 10 km of São José has lost about 956 hectares of forest (about 1,300 football pitches): 14% of the forest it had in 2000. Most of it (86%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss is slowing down: about 25 hectares a year in 2021–2025, down from 52 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around São José shrank from about 6,570 hectares to 6,200 hectares, a net loss of about 368 hectares (−5.6%). New forest grew on about 273 hectares, but 641 hectares were lost.
What is the tree count in São José?
São José has an estimated 43,124 trees across the 7.01 km² of land measured — 24.6% tree cover, 5 percentage points short of the 30% tree-cover target set for this area.
How many more trees does São José need?
São José needs roughly 9,466 more trees to close a 5-point shortfall against its 30% tree-cover target — about 208.3 t of extra CO₂ absorbed per year once grown.
How are São José's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. 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 Centro; the tree count is an estimate derived from that cover.
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