United States · Oregon · 5 places
Air quality in Oregon today The AQI right now, city by city
Right now, Gresham has the cleanest air of the 5 Oregon cities we track (AQI 9, Good), and Eugene the worst (AQI 64, Moderate). Gresham has the most tree cover, at 47.5% — #19 of 278 large US cities.
Every place is measured the same way, over the same 1.2 mi (2 km) around its center: the air quality right now, from ground stations where there are any, and its tree cover.
Average right now
AQI 42
Good
- places tracked
- 5
- average tree cover
- 37.7%
- US cities: 25.1%
- worst air now: Eugene
- 64
- cleanest air now: Gresham
- 9
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
Oregon · average AQI 42
Air quality today across Oregon, city by city
| Portland | 44Good | 21.4% | 23.7K | #150 of 278 |
|---|---|---|---|---|
| Eugene | 64Moderate | 36.9% | — | #51 of 278 |
| Salem | 51Moderate | 42.2% | — | #27 of 278 |
| Gresham | 9Good | 47.5% | — | #19 of 278 |
| Hillsboro | 43Good | 40.5% | — | #37 of 278 |
Air quality is the US AQI from ground monitoring stations via OpenAQ where available, otherwise the Open-Meteo / CAMS model, refreshed hourly. Tree cover is measured within 1.2 mi (2 km) of each city center from Sentinel-2 imagery. The US greenness rank covers cities of 100,000+ people; see the full ranking.
Deforestation · 2001–2025
How much forest has Oregon lost?
Since 2001, Oregon has lost about 6.62 million acres (2.68 million hectares) of forest (about 27,000 km²): 28% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 101,000 acres (40,700 hectares) (1.5%) was deforestation: forest cleared for good for farms, mines or towns.
- Forest lost since 2001
- 6.62 million acres (2.68 million ha)about 27,000 km²
- Share of its forest
- 28%of what there was in 2000
- Cleared for good
- 101,000 acres (40,700 ha)deforestation: turned into farms, mines or towns
Acres of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 4,670 acres (1,890 ha) | 160,000 acres (64,700 ha) | 165,000 acres (66,600 ha) |
| 2002 | 5,680 acres (2,300 ha) | 479,000 acres (194,000 ha) | 484,000 acres (196,000 ha) |
| 2003 | 5,390 acres (2,180 ha) | 230,000 acres (93,200 ha) | 236,000 acres (95,400 ha) |
| 2004 | 6,500 acres (2,630 ha) | 309,000 acres (125,000 ha) | 316,000 acres (128,000 ha) |
| 2005 | 6,510 acres (2,640 ha) | 181,000 acres (73,100 ha) | 187,000 acres (75,800 ha) |
| 2006 | 6,510 acres (2,640 ha) | 217,000 acres (87,900 ha) | 224,000 acres (90,600 ha) |
| 2007 | 5,100 acres (2,060 ha) | 192,000 acres (77,800 ha) | 197,000 acres (79,900 ha) |
| 2008 | 3,910 acres (1,580 ha) | 208,000 acres (84,200 ha) | 212,000 acres (85,800 ha) |
| 2009 | 2,440 acres (989 ha) | 149,000 acres (60,400 ha) | 152,000 acres (61,400 ha) |
| 2010 | 2,760 acres (1,120 ha) | 171,000 acres (69,300 ha) | 174,000 acres (70,400 ha) |
| 2011 | 3,970 acres (1,610 ha) | 161,000 acres (65,300 ha) | 165,000 acres (66,900 ha) |
| 2012 | 4,100 acres (1,660 ha) | 188,000 acres (76,200 ha) | 192,000 acres (77,900 ha) |
| 2013 | 2,720 acres (1,100 ha) | 176,000 acres (71,200 ha) | 179,000 acres (72,300 ha) |
| 2014 | 2,980 acres (1,210 ha) | 203,000 acres (82,000 ha) | 206,000 acres (83,200 ha) |
| 2015 | 3,850 acres (1,560 ha) | 199,000 acres (80,700 ha) | 203,000 acres (82,300 ha) |
| 2016 | 4,750 acres (1,920 ha) | 267,000 acres (108,000 ha) | 272,000 acres (110,000 ha) |
| 2017 | 4,920 acres (1,990 ha) | 320,000 acres (130,000 ha) | 325,000 acres (132,000 ha) |
| 2018 | 4,420 acres (1,790 ha) | 342,000 acres (138,000 ha) | 347,000 acres (140,000 ha) |
| 2019 | 3,690 acres (1,490 ha) | 254,000 acres (103,000 ha) | 257,000 acres (104,000 ha) |
| 2020 | 2,790 acres (1,130 ha) | 452,000 acres (183,000 ha) | 455,000 acres (184,000 ha) |
| 2021 | 3,700 acres (1,500 ha) | 492,000 acres (199,000 ha) | 496,000 acres (201,000 ha) |
| 2022 | 2,760 acres (1,120 ha) | 333,000 acres (135,000 ha) | 336,000 acres (136,000 ha) |
| 2023 | 1,890 acres (763 ha) | 244,000 acres (98,600 ha) | 246,000 acres (99,400 ha) |
| 2024 | 1,820 acres (738 ha) | 398,000 acres (161,000 ha) | 400,000 acres (162,000 ha) |
| 2025 | 2,710 acres (1,100 ha) | 194,000 acres (78,500 ha) | 197,000 acres (79,600 ha) |
Forest loss has stayed about the same: about 335,000 acres (136,000 hectares) a year in 2021–2025, against 331,000 acres (134,000 hectares) a year in 2016–2020. The worst year was 2021, when about 496,000 acres (201,000 hectares) of forest were lost, mostly to wildfires.
What is causing deforestation in Oregon?
- Loggingcan grow back57% · 3.8 million acres (1.54 million ha)
- Wildfirescan grow back39% · 2.6 million acres (1.05 million ha)
- Storms, floods and other natural causescan grow back1.4% · 90,200 acres (36,500 ha)
Also: farms, pasture and plantations, towns and roads, mining and energy, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
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. How it's measured
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