City report · California, United States
Fairfield Air quality today
Air quality in Fairfield currently reads AQI 8 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 8
Good
- PM2.5, fine particles (µg/m³)
- 1.1
- tree cover
- 11.4%
- trees in this area
- 35.3K
- more trees needed
- 57.6K
Measured across a 1.2 mi (2 km) radius around Fairfield, CA, USA (4.9 sq mi), from a satellite image of Sep 15, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Fairfield · AQI 8 (Good)
Fairfield's tree count comes to 35,277 trees across 4.8 sq mi (12.38 km²) of land, 19 points below the 30% tree-cover level considered healthy for this area, so roughly 57,557 more trees would close the gap.
Air quality detail
Air quality in Fairfield today: AQI 8, Good
Main pollutant: PM2.5 · Observed Nov 10, 10:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 45 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 4 station cities within 28.0 mi (45 km), e.g. Vallejo and Concord
Health signal
Air quality is satisfactory for everyone.
PM2.5
1.1
PM10
4.4
NO₂
6.6
O₃
53.0
SO₂
0.2
CO
206.0
- 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 Fairfield's daily AQI at 49 on average, from 43 on Nov 4 to an hourly peak of 81 on Nov 7.
Where Fairfield stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Fairfield: Critically low
11.4% tree cover against a 30% healthy-neighborhood target, across 4.8 sq mi (12.38 km²) of land.
Trees in this area
35,277
Target trees
92,834
More trees needed
57,557
CO₂ if planted / yr
1,266 t
Deforestation · 2001–2025
How much forest has Fairfield lost?
Since 2001, the area within 10 km of Fairfield has lost about 991 acres (401 hectares) of forest (about 750 football fields): 17% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (43%). About 459 acres (186 hectares) (46%) 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 north of the city center.
- Forest lost since 2001
- 991 acres (401 ha)about 750 football fields
- Share of its forest
- 17%of what there was in 2000
- Cleared for good
- 459 acres (186 ha)deforestation: turned into farms, mines or towns
The worst year was 2001, when about 299 acres (121 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 | 175 acres (71 ha) | 124 acres (50 ha) | 299 acres (121 ha) |
| 2002 | 10 acres (4 ha) | 4 acres (2 ha) | 14 acres (6 ha) |
| 2003 | 38 acres (15 ha) | 9 acres (4 ha) | 47 acres (19 ha) |
| 2004 | 17 acres (7 ha) | under 1 ha | 18 acres (7 ha) |
| 2005 | 54 acres (22 ha) | 3 acres (1 ha) | 57 acres (23 ha) |
| 2006 | 26 acres (11 ha) | 27 acres (11 ha) | 54 acres (22 ha) |
| 2007 | 20 acres (8 ha) | 64 acres (26 ha) | 84 acres (34 ha) |
| 2008 | 44 acres (18 ha) | 5 acres (2 ha) | 48 acres (20 ha) |
| 2009 | 10 acres (4 ha) | under 1 ha | 12 acres (5 ha) |
| 2010 | 2 acres (1 ha) | under 1 ha | 4 acres (2 ha) |
| 2011 | 6 acres (3 ha) | under 1 ha | 8 acres (3 ha) |
| 2012 | 14 acres (6 ha) | 22 acres (9 ha) | 37 acres (15 ha) |
| 2013 | under 1 ha | 12 acres (5 ha) | 14 acres (6 ha) |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | 3 acres (1 ha) |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | 4 acres (2 ha) | under 1 ha | 4 acres (2 ha) |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | 9 acres (4 ha) | 9 acres (4 ha) |
| 2021 | 3 acres (1 ha) | 243 acres (98 ha) | 246 acres (100 ha) |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | 26 acres (11 ha) | under 1 ha | 26 acres (11 ha) |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Fairfield?
- Farms, pasture and plantationscleared for good43% · 423 acres (171 ha)
- Storms, floods and other natural causescan grow back25% · 252 acres (102 ha)
- Wildfirescan grow back25% · 250 acres (101 ha)
Also: 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.
Forest gained and lost, 2000–2020
- Forest in 2000
- 5,560 acres (2,250 ha)
- Forest in 2020
- 6,380 acres (2,580 ha)
- Overall change
- +813 acres (329 ha)more forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Fairfield grew from about 5,560 acres (2,250 hectares) to 6,380 acres (2,580 hectares), a net gain of about 813 acres (329 hectares) (+15%). New forest grew on about 882 acres (357 hectares), while 68 acres (28 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 Fairfield
Same 2 km radius, same index — so they compare directly.
- Vallejo24.9 km
United States
- Tree cover
- 14%
- Air quality
- 7
- Concord30.2 km
United States
- Tree cover
- 22%
- Air quality
- 8
- Antioch34.0 km
United States
- Tree cover
- 14%
- Air quality
- 8
- Richmond44.1 km
United States
- Tree cover
- 5%
- Air quality
- 10
- Oakland53.5 km
United States
- Tree cover
- 7%
- Air quality
- 31
- Sacramento60.2 km
United States
- Tree cover
- 26%
- Air quality
- 63
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Frequently asked
Questions about Fairfield
What is the air quality (AQI) in Fairfield right now?
The latest reading for Fairfield shows an AQI of 8 (Good), observed Nov 10, 10:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 45 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Fairfield today?
At AQI 8 (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 Fairfield been like this week?
Over the last 7 days, the CAMS air-quality model put Fairfield's daily AQI at 49 on average, from 43 on Nov 4 to an hourly peak of 81 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Fairfield lost since 2001?
Since 2001, the area within 10 km of Fairfield has lost about 991 acres (401 hectares) of forest (about 750 football fields): 17% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (43%). About 459 acres (186 hectares) (46%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Fairfield grew from about 5,560 acres (2,250 hectares) to 6,380 acres (2,580 hectares), a net gain of about 813 acres (329 hectares) (+15%). New forest grew on about 882 acres (357 hectares), while 68 acres (28 hectares) were lost.
What is the tree count in Fairfield?
Fairfield has an estimated 35,277 trees across the 4.8 sq mi (12.38 km²) of land measured — 11.4% tree cover, 19 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Fairfield need?
Fairfield needs roughly 57,557 more trees to close a 19-point shortfall against its 30% tree-cover target — about 1,266 t of extra CO₂ absorbed per year once grown.
How are Fairfield'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 1.2 mi (2 km) radius around Fairfield; the tree count is an estimate derived from that cover.
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