City report · Maranhão, Brazil
Caxias Air quality today
Air quality in Caxias currently reads AQI 60 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 60
Moderate
- PM2.5, fine particles (µg/m³)
- 13.9
- tree cover
- 33.3%
- trees in this area
- 105K
- more trees needed
- 0
Measured across a 2 km radius around Centro, Caxias - MA, Brazil (12.57 km²), from a satellite image of Nov 9, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Caxias · AQI 60 (Moderate)
Caxias's tree count comes to 104,615 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 Caxias today: AQI 60, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 10:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
13.9
PM10
19.0
NO₂
0.5
O₃
78.0
SO₂
0.7
CO
146.0
- 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 Caxias's daily AQI at 56 on average, from 50 on Nov 9 to an hourly peak of 80 on Nov 8.
Where Caxias stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Caxias: Healthy tree cover
33.3% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
104,615
Target trees
104,615
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Caxias lost?
Since 2001, the area within 10 km of Caxias has lost about 5,270 hectares of forest (about 7,400 football pitches): 25% of the forest it had in 2000. Most of it (85%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from July 2017 of a 5 × 5 km area about 6 km northeast of the city center.
- Forest lost since 2001
- 5,270 haabout 7,400 football pitches
- Share of its forest
- 25%of what there was in 2000
- Cleared for good
- 4,480 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 264 hectares a year in 2021–2025, against 349 hectares a year in 2016–2020. The worst year was 2016, when about 655 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 | 67 ha | 13 ha | 79 ha |
| 2002 | 151 ha | 21 ha | 172 ha |
| 2003 | 26 ha | 8 ha | 34 ha |
| 2004 | 224 ha | 30 ha | 254 ha |
| 2005 | 63 ha | 7 ha | 70 ha |
| 2006 | 68 ha | 2 ha | 71 ha |
| 2007 | 122 ha | 7 ha | 129 ha |
| 2008 | 194 ha | 12 ha | 206 ha |
| 2009 | 142 ha | 10 ha | 152 ha |
| 2010 | 300 ha | 17 ha | 317 ha |
| 2011 | 58 ha | 5 ha | 63 ha |
| 2012 | 205 ha | 16 ha | 221 ha |
| 2013 | 178 ha | 6 ha | 184 ha |
| 2014 | 107 ha | 15 ha | 122 ha |
| 2015 | 126 ha | 7 ha | 133 ha |
| 2016 | 464 ha | 191 ha | 655 ha |
| 2017 | 356 ha | 264 ha | 620 ha |
| 2018 | 196 ha | 52 ha | 248 ha |
| 2019 | 85 ha | 9 ha | 94 ha |
| 2020 | 113 ha | 14 ha | 127 ha |
| 2021 | 191 ha | 16 ha | 207 ha |
| 2022 | 308 ha | 13 ha | 321 ha |
| 2023 | 182 ha | 13 ha | 195 ha |
| 2024 | 353 ha | 12 ha | 365 ha |
| 2025 | 200 ha | 32 ha | 232 ha |
What is causing deforestation around Caxias?
- Farms, pasture and plantationscleared for good65% · 3,420 ha
- Towns and roadscleared for good11% · 596 ha
- Wildfirescan grow back11% · 563 ha
Also: mining and energy, shifting farming, logging, 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
- 15,100 ha
- Forest in 2020
- 13,500 ha
- Overall change
- −1,620 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Caxias shrank from about 15,100 hectares to 13,500 hectares, a net loss of about 1,620 hectares (−11%). New forest grew on about 192 hectares, but 1,820 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 Caxias
What is the air quality (AQI) in Caxias right now?
The latest reading for Caxias shows an AQI of 60 (Moderate), observed Nov 11, 10:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Caxias today?
At AQI 60 (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 Caxias been like this week?
Over the last 7 days, the CAMS air-quality model put Caxias's daily AQI at 56 on average, from 50 on Nov 9 to an hourly peak of 80 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 Caxias lost since 2001?
Since 2001, the area within 10 km of Caxias has lost about 5,270 hectares of forest (about 7,400 football pitches): 25% of the forest it had in 2000. Most of it (85%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss has stayed about the same: about 264 hectares a year in 2021–2025, against 349 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Caxias shrank from about 15,100 hectares to 13,500 hectares, a net loss of about 1,620 hectares (−11%). New forest grew on about 192 hectares, but 1,820 hectares were lost.
What is the tree count in Caxias?
Caxias has an estimated 104,615 trees across the 12.57 km² measured — 33.3% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Caxias need?
Caxias has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Caxias'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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