City report · São Paulo, Brazil
Assis Air quality today
Air quality in Assis currently reads AQI 46 (Good): Air quality is satisfactory for everyone.
AQI 46
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 7.8
- tree cover
- 17.4%
- trees in this area
- 54.7K
- more trees needed
- 39.6K
Measured across a 2 km radius around Centro, Assis - SP, Brazil (12.57 km²), from a satellite image of Sep 18, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Assis · AQI 46 (Good)
Assis's tree count comes to 54,664 trees across 12.57 km², 13 points below the 30% tree-cover level considered healthy for this area, so roughly 39,584 more trees would close the gap.
Air quality detail
Air quality in Assis today: AQI 46, Good
Main pollutant: PM2.5 · Observed Nov 10, 14:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 245 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 3 station cities within 245 km, e.g. Presidente Prudente and Bauru
Health signal
Air quality is satisfactory for everyone.
PM2.5
7.8
PM10
9.7
NO₂
1.2
O₃
97.0
SO₂
1.4
CO
155.0
- 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 Assis's daily AQI at 100 on average, from 42 on Nov 9 to an hourly peak of 253 on Nov 8.
Where Assis stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Assis: Critically low
17.4% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
54,664
Target trees
94,248
More trees needed
39,584
CO₂ if planted / yr
870.8 t
Deforestation · 2001–2025
How much forest has Assis lost?
Since 2001, the area within 10 km of Assis has lost about 824 hectares of forest (about 1,200 football pitches): 16% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 72 hectares (8.7%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from September 2017 of a 5 × 5 km area about 7 km northeast of the city center.
- Forest lost since 2001
- 824 haabout 1,200 football pitches
- Share of its forest
- 16%of what there was in 2000
- Cleared for good
- 72 hadeforestation: turned into farms, mines or towns
The worst year was 2025, when about 132 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 | 11 ha | 56 ha | 67 ha |
| 2002 | 4 ha | 86 ha | 91 ha |
| 2003 | 2 ha | 80 ha | 83 ha |
| 2004 | 7 ha | 37 ha | 44 ha |
| 2005 | 3 ha | 96 ha | 99 ha |
| 2006 | 2 ha | 60 ha | 62 ha |
| 2007 | 3 ha | 60 ha | 63 ha |
| 2008 | 3 ha | 29 ha | 31 ha |
| 2009 | 1 ha | 12 ha | 14 ha |
| 2010 | 8 ha | 28 ha | 37 ha |
| 2011 | under 1 ha | 15 ha | 15 ha |
| 2012 | 4 ha | 11 ha | 14 ha |
| 2013 | under 1 ha | 9 ha | 9 ha |
| 2014 | under 1 ha | 1 ha | 2 ha |
| 2015 | 2 ha | under 1 ha | 2 ha |
| 2016 | 1 ha | 8 ha | 9 ha |
| 2017 | 1 ha | 6 ha | 8 ha |
| 2018 | 1 ha | under 1 ha | 2 ha |
| 2019 | under 1 ha | 1 ha | 2 ha |
| 2020 | 2 ha | under 1 ha | 2 ha |
| 2021 | under 1 ha | 2 ha | 2 ha |
| 2022 | under 1 ha | 2 ha | 2 ha |
| 2023 | under 1 ha | under 1 ha | 1 ha |
| 2024 | 2 ha | 30 ha | 32 ha |
| 2025 | 11 ha | 121 ha | 132 ha |
What is causing deforestation around Assis?
- Loggingcan grow back88% · 724 ha
- Farms, pasture and plantationscleared for good7% · 58 ha
- Towns and roadscleared for good1.7% · 14 ha
Also: 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
- 6,050 ha
- Forest in 2020
- 6,380 ha
- Overall change
- +329 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Assis grew from about 6,050 hectares to 6,380 hectares, a net gain of about 329 hectares (+5.4%). New forest grew on about 411 hectares, while 81 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 Assis
What is the air quality (AQI) in Assis right now?
The latest reading for Assis shows an AQI of 46 (Good), observed Nov 10, 14:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 245 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Assis 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 Assis been like this week?
Over the last 7 days, the CAMS air-quality model put Assis's daily AQI at 100 on average, from 42 on Nov 9 to an hourly peak of 253 on Nov 8. On 5 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Assis lost since 2001?
Since 2001, the area within 10 km of Assis has lost about 824 hectares of forest (about 1,200 football pitches): 16% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 72 hectares (8.7%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Assis grew from about 6,050 hectares to 6,380 hectares, a net gain of about 329 hectares (+5.4%). New forest grew on about 411 hectares, while 81 hectares were lost.
What is the tree count in Assis?
Assis has an estimated 54,664 trees across the 12.57 km² measured — 17.4% tree cover, 13 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Assis need?
Assis needs roughly 39,584 more trees to close a 13-point shortfall against its 30% tree-cover target — about 870.8 t of extra CO₂ absorbed per year once grown.
How are Assis'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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