City report · Biobio, Chile
Coronel Air quality today
Air quality in Coronel currently reads AQI 44 (Good): Air quality is satisfactory for everyone.
AQI 44
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 7.4
- tree cover
- 36.2%
- trees in this area
- 83.9K
- more trees needed
- 0
Measured across a 2 km radius around Coronel, Bio Bio, Chile (12.57 km²), from a satellite image of Mar 13, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Coronel · AQI 44 (Good)
Coronel's tree count comes to 83,930 trees across 9.28 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Coronel today: AQI 44, Good
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
Air quality is satisfactory for everyone.
PM2.5
7.4
PM10
9.6
NO₂
3.5
O₃
37.0
SO₂
1.2
CO
293.0
- 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 Coronel's daily AQI at 25 on average, from 13 on Nov 6 to an hourly peak of 54 on Nov 5.
Where Coronel stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Coronel: Healthy tree cover
36.2% tree cover against a 30% healthy-neighborhood target, across 9.28 km² of land.
Trees in this area
83,930
Target trees
83,930
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Coronel lost?
Since 2001, the area within 10 km of Coronel has lost about 10,200 hectares of forest (about 14,000 football pitches): 74% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 29 hectares (under 1%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from January 2017 of a 5 × 5 km area about 5 km east of the city center.
- Forest lost since 2001
- 10,200 haabout 14,000 football pitches
- Share of its forest
- 74%of what there was in 2000
- Cleared for good
- 29 hadeforestation: turned into farms, mines or towns
Forest loss is speeding up: about 516 hectares a year in 2021–2025, up from 359 hectares a year in 2016–2020. The worst year was 2023, when about 1,860 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 | 124 ha | 124 ha |
| 2002 | under 1 ha | 165 ha | 166 ha |
| 2003 | 4 ha | 229 ha | 233 ha |
| 2004 | under 1 ha | 187 ha | 187 ha |
| 2005 | under 1 ha | 120 ha | 120 ha |
| 2006 | under 1 ha | 54 ha | 55 ha |
| 2007 | 2 ha | 348 ha | 350 ha |
| 2008 | 2 ha | 416 ha | 418 ha |
| 2009 | 2 ha | 503 ha | 505 ha |
| 2010 | under 1 ha | 586 ha | 587 ha |
| 2011 | under 1 ha | 635 ha | 636 ha |
| 2012 | 2 ha | 481 ha | 483 ha |
| 2013 | under 1 ha | 1,030 ha | 1,040 ha |
| 2014 | under 1 ha | 548 ha | 549 ha |
| 2015 | 5 ha | 329 ha | 334 ha |
| 2016 | 2 ha | 501 ha | 503 ha |
| 2017 | 2 ha | 492 ha | 494 ha |
| 2018 | under 1 ha | 158 ha | 158 ha |
| 2019 | 1 ha | 521 ha | 522 ha |
| 2020 | 2 ha | 116 ha | 118 ha |
| 2021 | under 1 ha | 382 ha | 382 ha |
| 2022 | under 1 ha | 121 ha | 121 ha |
| 2023 | under 1 ha | 1,860 ha | 1,860 ha |
| 2024 | under 1 ha | 138 ha | 138 ha |
| 2025 | under 1 ha | 86 ha | 86 ha |
What is causing deforestation around Coronel?
- Loggingcan grow back90% · 9,100 ha
- Wildfirescan grow back10% · 1,030 ha
Also: towns and roads, farms, pasture and plantations, 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
- 13,700 ha
- Forest in 2020
- 13,100 ha
- Overall change
- −623 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Coronel shrank from about 13,700 hectares to 13,100 hectares, a net loss of about 623 hectares (−4.5%). New forest grew on about 729 hectares, but 1,350 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 Coronel
Same 2 km radius, same index — so they compare directly.
- Concepción24.4 km
Chile
- Tree cover
- 28%
- Air quality
- 48
- Talcahuano34.4 km
Chile
- Tree cover
- 19%
- Air quality
- 48
- Los Ángeles84.8 km
Chile
- Tree cover
- 15%
- Air quality
- 58
- Chillán103.8 km
Chile
- Tree cover
- 11%
- Air quality
- 55
- Villa Mercedes110.7 km
Chile
- Tree cover
- 33%
- Air quality
- 29
- Temuco195.2 km
Chile
- Tree cover
- 26%
- Air quality
- 48
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Frequently asked
Questions about Coronel
What is the air quality (AQI) in Coronel right now?
The latest reading for Coronel shows an AQI of 44 (Good), observed Nov 10, 23:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Coronel today?
At AQI 44 (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 Coronel been like this week?
Over the last 7 days, the CAMS air-quality model put Coronel's daily AQI at 25 on average, from 13 on Nov 6 to an hourly peak of 54 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 Coronel lost since 2001?
Since 2001, the area within 10 km of Coronel has lost about 10,200 hectares of forest (about 14,000 football pitches): 74% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 29 hectares (under 1%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is speeding up: about 516 hectares a year in 2021–2025, up from 359 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Coronel shrank from about 13,700 hectares to 13,100 hectares, a net loss of about 623 hectares (−4.5%). New forest grew on about 729 hectares, but 1,350 hectares were lost.
What is the tree count in Coronel?
Coronel has an estimated 83,930 trees across the 9.28 km² of land measured — 36.2% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Coronel need?
Coronel has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Coronel'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 Coronel; the tree count is an estimate derived from that cover.
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