City report · Castille and León, Spain
León Air quality today
Air quality in León currently reads AQI 23 (Good): Air quality is satisfactory for everyone.
AQI 23
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 2.0
- tree cover
- 13.2%
- trees in this area
- 41.5K
- more trees needed
- 52.8K
Measured across a 2 km radius around León, Province of León, Spain (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
León · AQI 23 (Good)
León's tree count comes to 41,469 trees across 12.57 km², 17 points below the 30% tree-cover level considered healthy for this area, so roughly 52,779 more trees would close the gap.
Air quality detail
Air quality in León today: AQI 23, Good
Main pollutant: Ozone · Observed Nov 11, 16:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · BARRIO PINILLA, 1.4 km away · median of 2 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.0
PM10
3.0
NO₂
—
O₃
51.0
SO₂
—
CO
100.0
Data: OpenAQ · EEA
- 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 León's daily AQI at 30 on average, from 10 on Nov 10 to an hourly peak of 60 on Nov 6.
Where León stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in León: Critically low
13.2% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
41,469
Target trees
94,248
More trees needed
52,779
CO₂ if planted / yr
1,161 t
Deforestation · 2001–2025
How much forest has León lost?
Since 2001, the area within 10 km of León has lost about 279 hectares of forest (about 390 football pitches): 17% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 30 hectares (11%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from September 2017 of a 5 × 5 km area about 7 km northwest of the city center.
- Forest lost since 2001
- 279 haabout 390 football pitches
- Share of its forest
- 17%of what there was in 2000
- Cleared for good
- 30 hadeforestation: turned into farms, mines or towns
The worst year was 2020, when about 27 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | under 1 ha | 1 ha |
| 2002 | 3 ha | 9 ha | 11 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 2 ha | 7 ha | 9 ha |
| 2005 | 2 ha | 4 ha | 6 ha |
| 2006 | under 1 ha | 4 ha | 5 ha |
| 2007 | 1 ha | 6 ha | 7 ha |
| 2008 | 1 ha | 13 ha | 14 ha |
| 2009 | under 1 ha | 24 ha | 24 ha |
| 2010 | 1 ha | 7 ha | 8 ha |
| 2011 | under 1 ha | 12 ha | 13 ha |
| 2012 | 2 ha | 11 ha | 13 ha |
| 2013 | under 1 ha | 12 ha | 12 ha |
| 2014 | 1 ha | 7 ha | 8 ha |
| 2015 | under 1 ha | 16 ha | 17 ha |
| 2016 | 7 ha | 19 ha | 26 ha |
| 2017 | under 1 ha | 10 ha | 11 ha |
| 2018 | under 1 ha | 15 ha | 15 ha |
| 2019 | 2 ha | 17 ha | 19 ha |
| 2020 | 2 ha | 25 ha | 27 ha |
| 2021 | under 1 ha | 10 ha | 11 ha |
| 2022 | under 1 ha | 10 ha | 11 ha |
| 2023 | under 1 ha | 6 ha | 6 ha |
| 2024 | under 1 ha | 5 ha | 5 ha |
| 2025 | 2 ha | 1 ha | 3 ha |
What is causing deforestation around León?
- Loggingcan grow back83% · 231 ha
- Towns and roadscleared for good5.7% · 16 ha
- Farms, pasture and plantationscleared for good5.1% · 14 ha
Also: wildfires, 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
- 2,050 ha
- Forest in 2020
- 2,030 ha
- Overall change
- −22 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around León stayed about the same size, at about 2,030 hectares: new forest grew on about 253 hectares, and about 275 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
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Frequently asked
Questions about León
What is the air quality (AQI) in León right now?
The latest reading for León shows an AQI of 23 (Good), measured Nov 11, 16:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is BARRIO PINILLA, 1.4 km away). The main pollutant is Ozone. Air quality is satisfactory for everyone.
Is it safe to exercise outside in León today?
At AQI 23 (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 León been like this week?
Over the last 7 days, the CAMS air-quality model put León's daily AQI at 30 on average, from 10 on Nov 10 to an hourly peak of 60 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 León lost since 2001?
Since 2001, the area within 10 km of León has lost about 279 hectares of forest (about 390 football pitches): 17% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 30 hectares (11%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around León stayed about the same size, at about 2,030 hectares: new forest grew on about 253 hectares, and about 275 hectares were lost.
What is the tree count in León?
León has an estimated 41,469 trees across the 12.57 km² measured — 13.2% tree cover, 17 percentage points short of the 30% tree-cover target set for this area.
How many more trees does León need?
León needs roughly 52,779 more trees to close a 17-point shortfall against its 30% tree-cover target — about 1,161 t of extra CO₂ absorbed per year once grown.
How are León's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near León, 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 2 km radius around León; the tree count is an estimate derived from that cover.
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