City report · Oregon, United States
Eugene Air quality today
Air quality in Eugene currently reads AQI 64 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 64
Moderate
- PM2.5, fine particles (µg/m³)
- 15.9
- tree cover
- 36.9%
- trees in this area
- 113K
- more trees needed
- 0
Measured across a 1.2 mi (2 km) radius around Downtown, Eugene, OR, 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.
Eugene · AQI 64 (Moderate)
Eugene's tree count comes to 113,143 trees across 4.7 sq mi (12.27 km²) of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Eugene today: AQI 64, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 07:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · SPS Farm, 3.0 mi (4.8 km) away · median of 2 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
15.9
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirNow
- 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 Eugene's daily AQI at 28 on average, from 10 on Nov 10 to an hourly peak of 64 on Nov 9.
Where Eugene stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Eugene: Healthy tree cover
36.9% tree cover against a 30% healthy-neighborhood target, across 4.7 sq mi (12.27 km²) of land.
Trees in this area
113,143
Target trees
113,143
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Eugene lost?
Since 2001, the area within 10 km of Eugene has lost about 2,460 acres (998 hectares) of forest (about 1,900 football fields): 9.2% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 745 acres (302 hectares) (30%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km southeast of the city center.
- Forest lost since 2001
- 2,460 acres (998 ha)about 1,900 football fields
- Share of its forest
- 9.2%of what there was in 2000
- Cleared for good
- 745 acres (302 ha)deforestation: turned into farms, mines or towns
Forest loss is slowing down: about 77 acres (31 hectares) a year in 2021–2025, down from 195 acres (79 hectares) a year in 2016–2020. The worst year was 2017, when about 257 acres (104 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 | 36 acres (15 ha) | 25 acres (10 ha) | 61 acres (25 ha) |
| 2002 | 49 acres (20 ha) | 31 acres (13 ha) | 80 acres (32 ha) |
| 2003 | 19 acres (8 ha) | 6 acres (2 ha) | 25 acres (10 ha) |
| 2004 | 13 acres (5 ha) | 55 acres (22 ha) | 68 acres (28 ha) |
| 2005 | 36 acres (15 ha) | 23 acres (9 ha) | 59 acres (24 ha) |
| 2006 | 55 acres (22 ha) | 109 acres (44 ha) | 165 acres (67 ha) |
| 2007 | 90 acres (36 ha) | 14 acres (6 ha) | 103 acres (42 ha) |
| 2008 | 19 acres (8 ha) | 24 acres (10 ha) | 43 acres (17 ha) |
| 2009 | 12 acres (5 ha) | 6 acres (2 ha) | 18 acres (7 ha) |
| 2010 | 5 acres (2 ha) | 10 acres (4 ha) | 15 acres (6 ha) |
| 2011 | 13 acres (5 ha) | 37 acres (15 ha) | 50 acres (20 ha) |
| 2012 | 9 acres (4 ha) | 21 acres (9 ha) | 30 acres (12 ha) |
| 2013 | 12 acres (5 ha) | 19 acres (8 ha) | 31 acres (13 ha) |
| 2014 | 19 acres (8 ha) | 148 acres (60 ha) | 167 acres (68 ha) |
| 2015 | 44 acres (18 ha) | 151 acres (61 ha) | 195 acres (79 ha) |
| 2016 | 37 acres (15 ha) | 128 acres (52 ha) | 165 acres (67 ha) |
| 2017 | 54 acres (22 ha) | 203 acres (82 ha) | 257 acres (104 ha) |
| 2018 | 34 acres (14 ha) | 191 acres (77 ha) | 224 acres (91 ha) |
| 2019 | 31 acres (13 ha) | 103 acres (42 ha) | 134 acres (54 ha) |
| 2020 | 27 acres (11 ha) | 166 acres (67 ha) | 193 acres (78 ha) |
| 2021 | 26 acres (11 ha) | 49 acres (20 ha) | 76 acres (31 ha) |
| 2022 | 18 acres (7 ha) | 85 acres (34 ha) | 103 acres (42 ha) |
| 2023 | 15 acres (6 ha) | 15 acres (6 ha) | 30 acres (12 ha) |
| 2024 | 9 acres (4 ha) | 58 acres (24 ha) | 67 acres (27 ha) |
| 2025 | 62 acres (25 ha) | 45 acres (18 ha) | 107 acres (43 ha) |
What is causing deforestation around Eugene?
- Loggingcan grow back69% · 1,690 acres (685 ha)
- Towns and roadscleared for good20% · 504 acres (204 ha)
- Farms, pasture and plantationscleared for good9.6% · 236 acres (95 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
- 37,300 acres (15,100 ha)
- Forest in 2020
- 36,900 acres (14,900 ha)
- Overall change
- −445 acres (180 ha)less forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Eugene stayed about the same size, at about 36,900 acres (14,900 hectares): new forest grew on about 1,290 acres (522 hectares), and about 1,730 acres (702 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 Eugene
Same 2 km radius, same index — so they compare directly.
- Salem99.1 km
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- Tree cover
- 42%
- Air quality
- 51
- Hillsboro163.7 km
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- 41%
- Air quality
- 43
- Portland166.8 km
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- Tree cover
- 21%
- Air quality
- 44
- Gresham168.9 km
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- Tree cover
- 48%
- Air quality
- 9
- Vancouver179.6 km
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- Tree cover
- 36%
- Air quality
- 48
- Tacoma359.4 km
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- Tree cover
- 19%
- Air quality
- 38
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Frequently asked
Questions about Eugene
What is the air quality (AQI) in Eugene right now?
The latest reading for Eugene shows an AQI of 64 (Moderate), measured Nov 11, 07:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is SPS Farm, 3.0 mi (4.8 km) away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Eugene today?
At AQI 64 (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 Eugene been like this week?
Over the last 7 days, the CAMS air-quality model put Eugene's daily AQI at 28 on average, from 10 on Nov 10 to an hourly peak of 64 on Nov 9. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Eugene lost since 2001?
Since 2001, the area within 10 km of Eugene has lost about 2,460 acres (998 hectares) of forest (about 1,900 football fields): 9.2% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 745 acres (302 hectares) (30%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 77 acres (31 hectares) a year in 2021–2025, down from 195 acres (79 hectares) a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Eugene stayed about the same size, at about 36,900 acres (14,900 hectares): new forest grew on about 1,290 acres (522 hectares), and about 1,730 acres (702 hectares) were lost.
What is the tree count in Eugene?
Eugene has an estimated 113,143 trees across the 4.7 sq mi (12.27 km²) of land measured — 36.9% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Eugene need?
Eugene has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Eugene's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Downtown, 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 Downtown; the tree count is an estimate derived from that cover.
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