City report · Colombia
Pasto Air quality today
Air quality in Pasto currently reads AQI 20 (Good): Air quality is satisfactory for everyone.
AQI 20
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 3.3
- tree cover
- 7.0%
- trees in this area
- 22.0K
- more trees needed
- 72.3K
Measured across a 2 km radius around Pasto, Narino, Colombia (12.57 km²), from a satellite image of Oct 27, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Pasto · AQI 20 (Good)
Pasto's tree count comes to 21,991 trees across 12.57 km², 23 points below the 30% tree-cover level considered healthy for this area, so roughly 72,257 more trees would close the gap.
Air quality detail
Air quality in Pasto today: AQI 20, Good
Main pollutant: PM2.5 · Observed Nov 11, 04:00 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
3.3
PM10
3.4
NO₂
1.3
O₃
37.0
SO₂
0.4
CO
124.0
- 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 Pasto's daily AQI at 21 on average, from 13 on Nov 7 to an hourly peak of 53 on Nov 8.
Where Pasto stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Pasto: Critically low
7.0% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
21,991
Target trees
94,248
More trees needed
72,257
CO₂ if planted / yr
1,590 t
Deforestation · 2001–2025
How much forest has Pasto lost?
Since 2001, the area within 10 km of Pasto has lost about 817 hectares of forest (about 1,100 football pitches): 5.8% of the forest it had in 2000. Most of it (78%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 817 haabout 1,100 football pitches
- Share of its forest
- 5.8%of what there was in 2000
- Cleared for good
- 639 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 100 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 | 85 ha | 15 ha | 100 ha |
| 2002 | 15 ha | 17 ha | 32 ha |
| 2003 | 22 ha | 11 ha | 32 ha |
| 2004 | 32 ha | 18 ha | 50 ha |
| 2005 | 55 ha | 4 ha | 60 ha |
| 2006 | 31 ha | 17 ha | 47 ha |
| 2007 | 52 ha | 21 ha | 73 ha |
| 2008 | 55 ha | 8 ha | 63 ha |
| 2009 | 32 ha | 4 ha | 36 ha |
| 2010 | 71 ha | 7 ha | 78 ha |
| 2011 | 38 ha | 12 ha | 49 ha |
| 2012 | 48 ha | 31 ha | 79 ha |
| 2013 | 19 ha | 2 ha | 21 ha |
| 2014 | 22 ha | 1 ha | 23 ha |
| 2015 | 1 ha | under 1 ha | 1 ha |
| 2016 | 18 ha | under 1 ha | 19 ha |
| 2017 | 13 ha | under 1 ha | 13 ha |
| 2018 | 4 ha | 2 ha | 6 ha |
| 2019 | 1 ha | 3 ha | 5 ha |
| 2020 | 4 ha | 1 ha | 5 ha |
| 2021 | 8 ha | 1 ha | 10 ha |
| 2022 | 6 ha | under 1 ha | 6 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | 2 ha | 2 ha | 4 ha |
| 2025 | 5 ha | under 1 ha | 6 ha |
What is causing deforestation around Pasto?
- Farms, pasture and plantationscleared for good77% · 629 ha
- Loggingcan grow back20% · 160 ha
- Towns and roadscleared for good1.2% · 10 ha
Also: storms, floods and other natural causes, 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
- 12,300 ha
- Forest in 2020
- 12,500 ha
- Overall change
- +156 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Pasto stayed about the same size, at about 12,500 hectares: new forest grew on about 432 hectares, and about 277 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 Pasto
What is the air quality (AQI) in Pasto right now?
The latest reading for Pasto shows an AQI of 20 (Good), observed Nov 11, 04:00 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 Pasto today?
At AQI 20 (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 Pasto been like this week?
Over the last 7 days, the CAMS air-quality model put Pasto's daily AQI at 21 on average, from 13 on Nov 7 to an hourly peak of 53 on Nov 8. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Pasto lost since 2001?
Since 2001, the area within 10 km of Pasto has lost about 817 hectares of forest (about 1,100 football pitches): 5.8% of the forest it had in 2000. Most of it (78%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Pasto stayed about the same size, at about 12,500 hectares: new forest grew on about 432 hectares, and about 277 hectares were lost.
What is the tree count in Pasto?
Pasto has an estimated 21,991 trees across the 12.57 km² measured — 7.0% tree cover, 23 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Pasto need?
Pasto needs roughly 72,257 more trees to close a 23-point shortfall against its 30% tree-cover target — about 1,590 t of extra CO₂ absorbed per year once grown.
How are Pasto'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 Pasto; the tree count is an estimate derived from that cover.
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