City report · Santiago Metropolitan, Chile
Puente Alto Air quality today
Air quality in Puente Alto currently reads AQI 58 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 58
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 13.2
- tree cover
- 7.9%
- trees in this area
- 24.8K
- more trees needed
- 69.4K
Measured across a 2 km radius around Puente Alto, 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.
Puente Alto · AQI 58 (Moderate)
Puente Alto's tree count comes to 24,819 trees across 12.57 km², 22 points below the 30% tree-cover level considered healthy for this area, so roughly 69,429 more trees would close the gap.
Air quality detail
Air quality in Puente Alto today: AQI 58, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 22:00 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
13.2
PM10
13.2
NO₂
14.3
O₃
128.0
SO₂
16.1
CO
1304.0
- 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 Puente Alto's daily AQI at 54 on average, from 38 on Nov 4 to an hourly peak of 97 on Nov 10.
Where Puente Alto stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Puente Alto: Critically low
7.9% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
24,819
Target trees
94,248
More trees needed
69,429
CO₂ if planted / yr
1,527 t
Deforestation · 2001–2025
How much forest has Puente Alto lost?
Since 2001, the area within 10 km of Puente Alto has lost about 38 hectares of forest (about 54 football pitches): 1.8% of the forest it had in 2000. The biggest cause was wildfires (41%), after which forest can grow back. About 14 hectares (37%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from March 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 38 haabout 54 football pitches
- Share of its forest
- 1.8%of what there was in 2000
- Cleared for good
- 14 hadeforestation: turned into farms, mines or towns
The worst year was 2014, when about 18 hectares of forest were lost, mostly to wildfires.
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 | under 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 | 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 2 ha | under 1 ha | 2 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | 2 ha | 2 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | 1 ha | 1 ha |
| 2012 | under 1 ha | 2 ha | 2 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | 3 ha | 15 ha | 18 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 4 ha | under 1 ha | 4 ha |
| 2017 | 4 ha | under 1 ha | 4 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 | 2 ha | 2 ha |
| 2021 | under 1 ha | under 1 ha | under 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 Puente Alto?
- Wildfirescan grow back41% · 16 ha
- Farms, pasture and plantationscleared for good24% · 9 ha
- Mining and energycleared for good11% · 4 ha
Also: logging, towns and roads, 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
- 2,920 ha
- Forest in 2020
- 2,940 ha
- Overall change
- +23 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Puente Alto stayed about the same size, at about 2,940 hectares: new forest grew on about 66 hectares, and about 43 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 Puente Alto
Same 2 km radius, same index — so they compare directly.
- Peñalolén16.4 km
Chile
- Tree cover
- 18%
- Air quality
- 58
- Santiago18.5 km
Chile
- Tree cover
- 9%
- Air quality
- 64
- Maipú20.6 km
Chile
- Tree cover
- 8%
- Air quality
- 70
- Quilicura30.0 km
Chile
- Tree cover
- 6%
- Air quality
- 62
- Lampa45.6 km
Chile
- Tree cover
- 11%
- Air quality
- 65
- Colina46.2 km
Chile
- Tree cover
- 7%
- Air quality
- 65
Also compared:Puente Alto vs Rancagua
Build your own
Compare Puente Alto with anywhere
This place
Puente Alto
Use this data
Put Puente Alto's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Puente Alto
What is the air quality (AQI) in Puente Alto right now?
The latest reading for Puente Alto shows an AQI of 58 (Moderate), observed Nov 10, 22:00 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 Puente Alto today?
At AQI 58 (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 Puente Alto been like this week?
Over the last 7 days, the CAMS air-quality model put Puente Alto's daily AQI at 54 on average, from 38 on Nov 4 to an hourly peak of 97 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Puente Alto lost since 2001?
Since 2001, the area within 10 km of Puente Alto has lost about 38 hectares of forest (about 54 football pitches): 1.8% of the forest it had in 2000. The biggest cause was wildfires (41%), after which forest can grow back. About 14 hectares (37%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Puente Alto stayed about the same size, at about 2,940 hectares: new forest grew on about 66 hectares, and about 43 hectares were lost.
What is the tree count in Puente Alto?
Puente Alto has an estimated 24,819 trees across the 12.57 km² measured — 7.9% tree cover, 22 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Puente Alto need?
Puente Alto needs roughly 69,429 more trees to close a 22-point shortfall against its 30% tree-cover target — about 1,527 t of extra CO₂ absorbed per year once grown.
How are Puente Alto'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 Puente Alto; the tree count is an estimate derived from that cover.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same air-quality and tree-cover breakdown.
Check my address