City report · Rio de Janeiro, Brazil
Maricá Air quality today
Air quality in Maricá currently reads AQI 14 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 14
Good
- PM2.5, fine particles (µg/m³)
- 2.3
- tree cover
- 47.7%
- trees in this area
- 138K
- more trees needed
- 0
Measured across a 2 km radius around Eldorado, Maricá - RJ, Brazil (12.57 km²), from a satellite image of Oct 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Maricá · AQI 14 (Good)
Maricá's tree count comes to 137,866 trees across 11.56 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Maricá today: AQI 14, Good
Main pollutant: PM2.5 · Observed Nov 10, 11:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 45 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 3 station cities within 45 km, e.g. São Gonçalo and Niterói
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.3
PM10
14.8
NO₂
1.1
O₃
57.0
SO₂
0.7
CO
74.0
- 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 Maricá's daily AQI at 57 on average, from 43 on Nov 7 to an hourly peak of 104 on Nov 4.
Where Maricá stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Maricá: Healthy tree cover
47.7% tree cover against a 30% healthy-neighborhood target, across 11.56 km² of land.
Trees in this area
137,866
Target trees
137,866
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Maricá lost?
Since 2001, the area within 10 km of Maricá has lost about 864 hectares of forest (about 1,200 football pitches): 7.4% of the forest it had in 2000. Most of it (95%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from June 2017 of a 5 × 5 km area about 7 km east of the city center.
- Forest lost since 2001
- 864 haabout 1,200 football pitches
- Share of its forest
- 7.4%of what there was in 2000
- Cleared for good
- 821 hadeforestation: turned into farms, mines or towns
The worst year was 2017, when about 199 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 | 56 ha | 2 ha | 57 ha |
| 2002 | 23 ha | under 1 ha | 23 ha |
| 2003 | 14 ha | under 1 ha | 14 ha |
| 2004 | 10 ha | under 1 ha | 11 ha |
| 2005 | 16 ha | under 1 ha | 16 ha |
| 2006 | 6 ha | under 1 ha | 6 ha |
| 2007 | 104 ha | 1 ha | 105 ha |
| 2008 | 20 ha | under 1 ha | 21 ha |
| 2009 | 12 ha | under 1 ha | 12 ha |
| 2010 | 15 ha | under 1 ha | 15 ha |
| 2011 | 17 ha | under 1 ha | 17 ha |
| 2012 | 28 ha | under 1 ha | 28 ha |
| 2013 | 11 ha | under 1 ha | 11 ha |
| 2014 | 87 ha | 1 ha | 89 ha |
| 2015 | 23 ha | under 1 ha | 23 ha |
| 2016 | 10 ha | under 1 ha | 10 ha |
| 2017 | 165 ha | 34 ha | 199 ha |
| 2018 | 4 ha | under 1 ha | 4 ha |
| 2019 | 21 ha | under 1 ha | 21 ha |
| 2020 | 16 ha | under 1 ha | 16 ha |
| 2021 | 19 ha | under 1 ha | 19 ha |
| 2022 | 17 ha | under 1 ha | 17 ha |
| 2023 | 30 ha | 1 ha | 31 ha |
| 2024 | 32 ha | under 1 ha | 32 ha |
| 2025 | 67 ha | under 1 ha | 67 ha |
What is causing deforestation around Maricá?
- Farms, pasture and plantationscleared for good55% · 476 ha
- Towns and roadscleared for good40% · 343 ha
- Wildfirescan grow back4.5% · 39 ha
Also: 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
- 10,400 ha
- Forest in 2020
- 10,300 ha
- Overall change
- −34 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Maricá stayed about the same size, at about 10,300 hectares: new forest grew on about 298 hectares, and about 332 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 Maricá
Same 2 km radius, same index — so they compare directly.
- Itaboraí19.9 km
Brazil
- Tree cover
- 45%
- Air quality
- 12
- São Gonçalo26.2 km
Brazil
- Tree cover
- 30%
- Air quality
- 21
- Niterói29.5 km
Brazil
- Tree cover
- 33%
- Air quality
- 21
- Rio de Janeiro37.3 km
Brazil
- Tree cover
- 21%
- Air quality
- 21
- Magé37.4 km
Brazil
- Tree cover
- 62%
- Air quality
- 25
- Araruama49.0 km
Brazil
- Tree cover
- 31%
- Air quality
- 17
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Frequently asked
Questions about Maricá
What is the air quality (AQI) in Maricá right now?
The latest reading for Maricá shows an AQI of 14 (Good), observed Nov 10, 11:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 45 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Maricá today?
At AQI 14 (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 Maricá been like this week?
Over the last 7 days, the CAMS air-quality model put Maricá's daily AQI at 57 on average, from 43 on Nov 7 to an hourly peak of 104 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Maricá lost since 2001?
Since 2001, the area within 10 km of Maricá has lost about 864 hectares of forest (about 1,200 football pitches): 7.4% of the forest it had in 2000. Most of it (95%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Maricá stayed about the same size, at about 10,300 hectares: new forest grew on about 298 hectares, and about 332 hectares were lost.
What is the tree count in Maricá?
Maricá has an estimated 137,866 trees across the 11.56 km² of land measured — 47.7% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Maricá need?
Maricá has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Maricá'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 Eldorado; the tree count is an estimate derived from that cover.
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