City report · Mongolia
Choibalsan Air quality today
Air quality in Choibalsan currently reads AQI 11 (Good): Air quality is satisfactory for everyone.
AQI 11
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 2.6
- tree cover
- 2.7%
- trees in this area
- 8.4K
- more trees needed
- 85.3K
Measured across a 2 km radius around Choibalsan, Dornod, Mongolia (12.57 km²), from a satellite image of Sep 19, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Choibalsan · AQI 11 (Good)
Choibalsan's tree count comes to 8,440 trees across 12.51 km² of land, 27 points below the 30% tree-cover level considered healthy for this area, so roughly 85,337 more trees would close the gap.
Air quality detail
Air quality in Choibalsan today: AQI 11, Good
Main pollutant: PM2.5 · Observed Nov 11, 18:00 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
2.6
PM10
3.2
NO₂
5.1
O₃
34.0
SO₂
2.5
CO
250.0
- 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 Choibalsan's daily AQI at 23 on average, from 6 on Nov 11 to an hourly peak of 85 on Nov 7.
Where Choibalsan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Choibalsan: Critically low
2.7% tree cover against a 30% healthy-neighborhood target, across 12.51 km² of land.
Trees in this area
8,440
Target trees
93,777
More trees needed
85,337
CO₂ if planted / yr
1,877 t
Deforestation · 2001–2025
How much forest has Choibalsan lost?
There was almost no forest around Choibalsan in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
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. Images: contains modified Copernicus Sentinel data. How it's measured
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Frequently asked
Questions about Choibalsan
What is the air quality (AQI) in Choibalsan right now?
The latest reading for Choibalsan shows an AQI of 11 (Good), observed Nov 11, 18:00 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 Choibalsan today?
At AQI 11 (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 Choibalsan been like this week?
Over the last 7 days, the CAMS air-quality model put Choibalsan's daily AQI at 23 on average, from 6 on Nov 11 to an hourly peak of 85 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Choibalsan lost since 2001?
There was almost no forest around Choibalsan in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
What is the tree count in Choibalsan?
Choibalsan has an estimated 8,440 trees across the 12.51 km² of land measured — 2.7% tree cover, 27 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Choibalsan need?
Choibalsan needs roughly 85,337 more trees to close a 27-point shortfall against its 30% tree-cover target — about 1,877 t of extra CO₂ absorbed per year once grown.
How are Choibalsan'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 Choibalsan; the tree count is an estimate derived from that cover.
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