City report · Washington, United States
Bellevue Air quality today
Air quality in Bellevue currently reads AQI 6 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 6
Good
- PM2.5, fine particles (µg/m³)
- 1.0
- tree cover
- 49.1%
- trees in this area
- 134K
- more trees needed
- 0
Measured across a 1.2 mi (2 km) radius around West Bellevue, Bellevue, WA, 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.
Bellevue · AQI 6 (Good)
Bellevue's tree count comes to 134,045 trees across 4.2 sq mi (10.92 km²) of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Bellevue today: AQI 6, Good
Main pollutant: PM2.5 · Observed Nov 11, 04:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · SE 12th St, Bellevue, Washington, USA, 2.5 mi (4.1 km) away
Health signal
Air quality is satisfactory for everyone.
PM2.5
1.0
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Washington State Department of Ecology, Air Now - US EPA
- 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 Bellevue's daily AQI at 48 on average, from 21 on Nov 10 to an hourly peak of 83 on Nov 4.
Where Bellevue stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Bellevue: Healthy tree cover
49.1% tree cover against a 30% healthy-neighborhood target, across 4.2 sq mi (10.92 km²) of land.
Trees in this area
134,045
Target trees
134,045
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Bellevue lost?
Since 2001, the area within 10 km of Bellevue has lost about 939 acres (380 hectares) of forest (about 710 football fields): 4.3% of the forest it had in 2000. Most of it (96%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km south of the city center.
- Forest lost since 2001
- 939 acres (380 ha)about 710 football fields
- Share of its forest
- 4.3%of what there was in 2000
- Cleared for good
- 898 acres (364 ha)deforestation: turned into farms, mines or towns
The worst year was 2022, when about 74 acres (30 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 | 23 acres (9 ha) | 3 acres (1 ha) | 26 acres (11 ha) |
| 2002 | 22 acres (9 ha) | under 1 ha | 22 acres (9 ha) |
| 2003 | 29 acres (12 ha) | under 1 ha | 30 acres (12 ha) |
| 2004 | 40 acres (16 ha) | under 1 ha | 40 acres (16 ha) |
| 2005 | 35 acres (14 ha) | 4 acres (2 ha) | 39 acres (16 ha) |
| 2006 | 44 acres (18 ha) | 3 acres (1 ha) | 47 acres (19 ha) |
| 2007 | 34 acres (14 ha) | under 1 ha | 35 acres (14 ha) |
| 2008 | 31 acres (13 ha) | 3 acres (1 ha) | 34 acres (14 ha) |
| 2009 | 13 acres (5 ha) | under 1 ha | 15 acres (6 ha) |
| 2010 | 12 acres (5 ha) | under 1 ha | 14 acres (6 ha) |
| 2011 | 14 acres (6 ha) | under 1 ha | 15 acres (6 ha) |
| 2012 | 42 acres (17 ha) | under 1 ha | 43 acres (17 ha) |
| 2013 | 37 acres (15 ha) | under 1 ha | 38 acres (15 ha) |
| 2014 | 37 acres (15 ha) | 3 acres (1 ha) | 40 acres (16 ha) |
| 2015 | 56 acres (23 ha) | 4 acres (2 ha) | 60 acres (24 ha) |
| 2016 | 49 acres (20 ha) | under 1 ha | 51 acres (21 ha) |
| 2017 | 68 acres (28 ha) | under 1 ha | 69 acres (28 ha) |
| 2018 | 69 acres (28 ha) | under 1 ha | 69 acres (28 ha) |
| 2019 | 33 acres (13 ha) | under 1 ha | 34 acres (14 ha) |
| 2020 | 26 acres (11 ha) | under 1 ha | 27 acres (11 ha) |
| 2021 | 53 acres (21 ha) | under 1 ha | 54 acres (22 ha) |
| 2022 | 74 acres (30 ha) | under 1 ha | 74 acres (30 ha) |
| 2023 | 19 acres (8 ha) | under 1 ha | 19 acres (8 ha) |
| 2024 | 19 acres (8 ha) | under 1 ha | 19 acres (8 ha) |
| 2025 | 20 acres (8 ha) | 4 acres (2 ha) | 25 acres (10 ha) |
What is causing deforestation around Bellevue?
- Towns and roadscleared for good96% · 897 acres (363 ha)
- Unknown causescause unknown4.4% · 42 acres (17 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
- 40,800 acres (16,500 ha)
- Forest in 2020
- 41,400 acres (16,800 ha)
- Overall change
- +588 acres (238 ha)more forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Bellevue stayed about the same size, at about 41,400 acres (16,800 hectares): new forest grew on about 976 acres (395 hectares), and about 390 acres (158 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 Bellevue
Same 2 km radius, same index — so they compare directly.
- Renton14.2 km
United States
- Tree cover
- 32%
- Air quality
- 27
- Kent25.6 km
United States
- Tree cover
- 36%
- Air quality
- 21
- Everett41.0 km
United States
- Tree cover
- 23%
- Air quality
- 22
- Tacoma43.8 km
United States
- Tree cover
- 19%
- Air quality
- 38
- Victoria125.5 km
Canada
- Tree cover
- 36%
- Air quality
- 36
- Saanich130.9 km
Canada
- Tree cover
- 47%
- Air quality
- 36
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Frequently asked
Questions about Bellevue
What is the air quality (AQI) in Bellevue right now?
The latest reading for Bellevue shows an AQI of 6 (Good), measured Nov 11, 04:00 local time by the SE 12th St, Bellevue, Washington, USA ground monitoring station, 2.5 mi (4.1 km) away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Bellevue today?
At AQI 6 (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 Bellevue been like this week?
Over the last 7 days, the CAMS air-quality model put Bellevue's daily AQI at 48 on average, from 21 on Nov 10 to an hourly peak of 83 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 Bellevue lost since 2001?
Since 2001, the area within 10 km of Bellevue has lost about 939 acres (380 hectares) of forest (about 710 football fields): 4.3% of the forest it had in 2000. Most of it (96%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Bellevue stayed about the same size, at about 41,400 acres (16,800 hectares): new forest grew on about 976 acres (395 hectares), and about 390 acres (158 hectares) were lost.
What is the tree count in Bellevue?
Bellevue has an estimated 134,045 trees across the 4.2 sq mi (10.92 km²) of land measured — 49.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Bellevue need?
Bellevue has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Bellevue's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near West Bellevue, 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 West Bellevue; the tree count is an estimate derived from that cover.
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