City report · Rio de Janeiro, Brazil
Barra do Piraí Air quality today
Air quality in Barra do Piraí currently reads AQI 14 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 14
Good
- PM2.5, fine particles (µg/m³)
- 2.8
- tree cover
- 40.5%
- trees in this area
- 125K
- more trees needed
- 0
Measured across a 2 km radius around Centro, Barra do Piraí - RJ, Brazil (12.57 km²), from a satellite image of Sep 4, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Barra do Piraí · AQI 14 (Good)
Barra do Piraí's tree count comes to 124,690 trees across 12.32 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Barra do Piraí today: AQI 14, Good
Main pollutant: PM2.5 · Observed Nov 10, 16:00 local time via Open-Meteo / CAMS, corrected with 8 ground-station cities within 105 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 8 station cities within 105 km, e.g. Queimados and Itaguaí
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.8
PM10
15.3
NO₂
6.7
O₃
55.0
SO₂
10.1
CO
101.0
- 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 Barra do Piraí's daily AQI at 62 on average, from 43 on Nov 9 to an hourly peak of 118 on Nov 6.
Where Barra do Piraí stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Barra do Piraí: Healthy tree cover
40.5% tree cover against a 30% healthy-neighborhood target, across 12.32 km² of land.
Trees in this area
124,690
Target trees
124,690
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Barra do Piraí lost?
Since 2001, the area within 10 km of Barra do Piraí has lost about 791 hectares of forest (about 1,100 football pitches): 6% of the forest it had in 2000. Most of it (61%) 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 5 km west of the city center.
- Forest lost since 2001
- 791 haabout 1,100 football pitches
- Share of its forest
- 6%of what there was in 2000
- Cleared for good
- 481 hadeforestation: turned into farms, mines or towns
The worst year was 2007, when about 117 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 | 28 ha | 7 ha | 36 ha |
| 2002 | 23 ha | under 1 ha | 24 ha |
| 2003 | 20 ha | 2 ha | 22 ha |
| 2004 | 11 ha | under 1 ha | 12 ha |
| 2005 | 4 ha | under 1 ha | 4 ha |
| 2006 | 33 ha | 3 ha | 36 ha |
| 2007 | 109 ha | 8 ha | 117 ha |
| 2008 | 11 ha | 3 ha | 13 ha |
| 2009 | 16 ha | 3 ha | 19 ha |
| 2010 | 24 ha | 13 ha | 37 ha |
| 2011 | 55 ha | 57 ha | 112 ha |
| 2012 | 15 ha | 6 ha | 21 ha |
| 2013 | 7 ha | 13 ha | 20 ha |
| 2014 | 17 ha | 30 ha | 47 ha |
| 2015 | 7 ha | 16 ha | 22 ha |
| 2016 | 8 ha | 8 ha | 17 ha |
| 2017 | 32 ha | 13 ha | 45 ha |
| 2018 | 5 ha | 22 ha | 27 ha |
| 2019 | 8 ha | 24 ha | 32 ha |
| 2020 | 5 ha | 18 ha | 22 ha |
| 2021 | 3 ha | 10 ha | 13 ha |
| 2022 | 7 ha | 14 ha | 21 ha |
| 2023 | 4 ha | 16 ha | 19 ha |
| 2024 | 17 ha | 23 ha | 40 ha |
| 2025 | 12 ha | 2 ha | 14 ha |
What is causing deforestation around Barra do Piraí?
- Farms, pasture and plantationscleared for good57% · 447 ha
- Loggingcan grow back33% · 259 ha
- Wildfirescan grow back4.6% · 36 ha
Also: towns and roads, 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
- 14,500 ha
- Forest in 2020
- 14,400 ha
- Overall change
- −41 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Barra do Piraí stayed about the same size, at about 14,400 hectares: new forest grew on about 288 hectares, and about 329 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 Barra do Piraí
Same 2 km radius, same index — so they compare directly.
- Japeri26.1 km
Brazil
- Tree cover
- 55%
- Air quality
- 25
- Volta Redonda29.2 km
Brazil
- Tree cover
- 39%
- Air quality
- 9
- Queimados39.0 km
Brazil
- Tree cover
- 36%
- Air quality
- 45
- Itaguaí42.8 km
Brazil
- Tree cover
- 34%
- Air quality
- 14
- Nova Iguaçu50.1 km
Brazil
- Tree cover
- 33%
- Air quality
- 77
- Duque de Caxias63.4 km
Brazil
- Tree cover
- 17%
- Air quality
- 126
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Frequently asked
Questions about Barra do Piraí
What is the air quality (AQI) in Barra do Piraí right now?
The latest reading for Barra do Piraí shows an AQI of 14 (Good), observed Nov 10, 16:00 local time via Open-Meteo / CAMS, corrected with 8 ground-station cities within 105 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Barra do Piraí 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 Barra do Piraí been like this week?
Over the last 7 days, the CAMS air-quality model put Barra do Piraí's daily AQI at 62 on average, from 43 on Nov 9 to an hourly peak of 118 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Barra do Piraí lost since 2001?
Since 2001, the area within 10 km of Barra do Piraí has lost about 791 hectares of forest (about 1,100 football pitches): 6% of the forest it had in 2000. Most of it (61%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Barra do Piraí stayed about the same size, at about 14,400 hectares: new forest grew on about 288 hectares, and about 329 hectares were lost.
What is the tree count in Barra do Piraí?
Barra do Piraí has an estimated 124,690 trees across the 12.32 km² of land measured — 40.5% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Barra do Piraí need?
Barra do Piraí has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Barra do Piraí'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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