City report · New York, United States
The Bronx Air quality today
Air quality in The Bronx currently reads AQI 28 (Good): Air quality is satisfactory for everyone.
AQI 28
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 5.1
- tree cover
- 30.1%
- trees in this area
- 94.6K
- more trees needed
- 0
Measured across a 1.2 mi (2 km) radius around Van Nest, Bronx, NY, USA (4.9 sq mi), from a satellite image of Sep 8, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
The Bronx · AQI 28 (Good)
The Bronx's tree count comes to 94,562 trees across 4.9 sq mi (12.57 km²), already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in The Bronx today: AQI 28, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Bronx - IS52, 3.0 mi (4.8 km) away · median of 4 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
5.1
PM10
—
NO₂
48.9
O₃
56.9
SO₂
—
CO
229.1
Data: OpenAQ · AirNow
- 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 The Bronx's daily AQI at 46 on average, from 28 on Nov 8 to an hourly peak of 107 on Nov 6.
Where The Bronx stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in The Bronx: Healthy tree cover
30.1% tree cover against a 30% healthy-neighborhood target, across 4.9 sq mi (12.57 km²).
Trees in this area
94,562
Target trees
94,562
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has The Bronx lost?
Since 2001, the area within 10 km of The Bronx has lost about 149 acres (60 hectares) of forest (about 110 football fields): 1.4% of the forest it had in 2000. Most of it (74%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 149 acres (60 ha)about 110 football fields
- Share of its forest
- 1.4%of what there was in 2000
- Cleared for good
- 110 acres (45 ha)deforestation: turned into farms, mines or towns
The worst year was 2005, when about 16 acres (6 hectares) of forest were lost.
Acres of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 3 acres (1 ha) | under 1 ha | 5 acres (2 ha) |
| 2002 | 9 acres (4 ha) | 3 acres (1 ha) | 11 acres (5 ha) |
| 2003 | 4 acres (2 ha) | under 1 ha | 5 acres (2 ha) |
| 2004 | 5 acres (2 ha) | 2 acres (1 ha) | 8 acres (3 ha) |
| 2005 | 14 acres (6 ha) | under 1 ha | 16 acres (6 ha) |
| 2006 | 6 acres (3 ha) | under 1 ha | 8 acres (3 ha) |
| 2007 | 6 acres (2 ha) | 4 acres (2 ha) | 10 acres (4 ha) |
| 2008 | 3 acres (1 ha) | 3 acres (1 ha) | 6 acres (2 ha) |
| 2009 | 3 acres (1 ha) | under 1 ha | 5 acres (2 ha) |
| 2010 | under 1 ha | under 1 ha | 5 acres (2 ha) |
| 2011 | 5 acres (2 ha) | under 1 ha | 6 acres (3 ha) |
| 2012 | 5 acres (2 ha) | under 1 ha | 6 acres (2 ha) |
| 2013 | under 1 ha | under 1 ha | 3 acres (1 ha) |
| 2014 | 2 acres (1 ha) | under 1 ha | 3 acres (1 ha) |
| 2015 | 4 acres (2 ha) | under 1 ha | 4 acres (2 ha) |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | 6 acres (3 ha) | under 1 ha | 7 acres (3 ha) |
| 2018 | 4 acres (2 ha) | under 1 ha | 4 acres (2 ha) |
| 2019 | 3 acres (1 ha) | under 1 ha | 4 acres (2 ha) |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | 3 acres (1 ha) | under 1 ha | 3 acres (1 ha) |
| 2022 | 7 acres (3 ha) | under 1 ha | 8 acres (3 ha) |
| 2023 | 6 acres (2 ha) | under 1 ha | 6 acres (2 ha) |
| 2024 | 5 acres (2 ha) | under 1 ha | 5 acres (2 ha) |
| 2025 | 3 acres (1 ha) | 4 acres (2 ha) | 7 acres (3 ha) |
What is causing deforestation around The Bronx?
- Towns and roadscleared for good72% · 107 acres (43 ha)
- Farms, pasture and plantationscleared for good2.2% · 3 acres (1 ha)
- Unknown causescause unknown26% · 39 acres (16 ha)
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
- 20,800 acres (8,430 ha)
- Forest in 2020
- 21,100 acres (8,530 ha)
- Overall change
- +252 acres (102 ha)more forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around The Bronx stayed about the same size, at about 21,100 acres (8,530 hectares): new forest grew on about 413 acres (167 hectares), and about 159 acres (64 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 The Bronx
Same 2 km radius, same index — so they compare directly.
- Queens18.9 km
United States
- Tree cover
- 12%
- Air quality
- 26
- New York19.2 km
United States
- Tree cover
- 15%
- Air quality
- 71
- Brooklyn23.3 km
United States
- Tree cover
- 23%
- Air quality
- 26
- Paterson26.7 km
United States
- Tree cover
- 26%
- Air quality
- 9
- Newark28.7 km
United States
- Tree cover
- 11%
- Air quality
- 26
- Elizabeth35.6 km
United States
- Tree cover
- 15%
- Air quality
- 28
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Frequently asked
Questions about The Bronx
What is the air quality (AQI) in The Bronx right now?
The latest reading for The Bronx shows an AQI of 28 (Good), measured Nov 11, 11:00 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Bronx - IS52, 3.0 mi (4.8 km) away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in The Bronx today?
At AQI 28 (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 The Bronx been like this week?
Over the last 7 days, the CAMS air-quality model put The Bronx's daily AQI at 46 on average, from 28 on Nov 8 to an hourly peak of 107 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 The Bronx lost since 2001?
Since 2001, the area within 10 km of The Bronx has lost about 149 acres (60 hectares) of forest (about 110 football fields): 1.4% of the forest it had in 2000. Most of it (74%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around The Bronx stayed about the same size, at about 21,100 acres (8,530 hectares): new forest grew on about 413 acres (167 hectares), and about 159 acres (64 hectares) were lost.
What is the tree count in The Bronx?
The Bronx has an estimated 94,562 trees across the 4.9 sq mi (12.57 km²) measured — 30.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does The Bronx need?
The Bronx has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are The Bronx's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Van Nest, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 1.2 mi (2 km) radius around Van Nest; the tree count is an estimate derived from that cover.
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