City report · Santiago Metropolitan, Chile
Colina Air quality today
Air quality in Colina currently reads AQI 65 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 65
Moderate
- PM2.5, fine particles (µg/m³)
- 18.1
- tree cover
- 6.6%
- trees in this area
- 20.7K
- more trees needed
- 73.5K
Measured across a 2 km radius around Colina, Santiago Metropolitan Region, Chile (12.57 km²), from a satellite image of Mar 13, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Colina · AQI 65 (Moderate)
Colina's tree count comes to 20,735 trees across 12.57 km², 23 points below the 30% tree-cover level considered healthy for this area, so roughly 73,513 more trees would close the gap.
Air quality detail
Air quality in Colina today: AQI 65, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 23:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
18.1
PM10
18.2
NO₂
43.9
O₃
51.0
SO₂
20.1
CO
835.0
- 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 Colina's daily AQI at 55 on average, from 41 on Nov 6 to an hourly peak of 87 on Nov 5.
Where Colina stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Colina: Critically low
6.6% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
20,735
Target trees
94,248
More trees needed
73,513
CO₂ if planted / yr
1,617 t
Deforestation · 2001–2025
How much forest has Colina lost?
Since 2001, the area within 10 km of Colina has lost about 41 hectares of forest (about 57 football pitches): 8.2% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from January 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 41 haabout 57 football pitches
- Share of its forest
- 8.2%of what there was in 2000
- Cleared for good
- 38 hadeforestation: turned into farms, mines or towns
The worst year was 2008, when about 29 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 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | 29 ha | under 1 ha | 29 ha |
| 2009 | 2 ha | under 1 ha | 2 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 3 ha | under 1 ha | 3 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | 1 ha | under 1 ha | 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 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 Colina?
- Farms, pasture and plantationscleared for good89% · 36 ha
- Towns and roadscleared for good4.7% · 2 ha
- Wildfirescan grow back2% · under 1 ha
Also: 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
- 1,210 ha
- Forest in 2020
- 1,250 ha
- Overall change
- +48 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Colina grew from about 1,210 hectares to 1,250 hectares, a net gain of about 48 hectares (+4%). New forest grew on about 141 hectares, while 94 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 Colina
What is the air quality (AQI) in Colina right now?
The latest reading for Colina shows an AQI of 65 (Moderate), observed Nov 10, 23:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Colina today?
At AQI 65 (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 Colina been like this week?
Over the last 7 days, the CAMS air-quality model put Colina's daily AQI at 55 on average, from 41 on Nov 6 to an hourly peak of 87 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Colina lost since 2001?
Since 2001, the area within 10 km of Colina has lost about 41 hectares of forest (about 57 football pitches): 8.2% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Colina grew from about 1,210 hectares to 1,250 hectares, a net gain of about 48 hectares (+4%). New forest grew on about 141 hectares, while 94 hectares were lost.
What is the tree count in Colina?
Colina has an estimated 20,735 trees across the 12.57 km² measured — 6.6% tree cover, 23 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Colina need?
Colina needs roughly 73,513 more trees to close a 23-point shortfall against its 30% tree-cover target — about 1,617 t of extra CO₂ absorbed per year once grown.
How are Colina'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 2 km radius around Colina; the tree count is an estimate derived from that cover.
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