City report · Jilin, China
Dehui Air quality today
Air quality in Dehui currently reads AQI 240 (Very unhealthy): Health alert — everyone should avoid long outdoor exertion.
Air quality right now
AQI 240
Very unhealthy
- PM2.5, fine particles (µg/m³)
- 145.3
- tree cover
- 7.8%
- trees in this area
- 24.5K
- more trees needed
- 117K
Measured across a 2 km radius around Dehui, Changchun, Jilin, China (12.57 km²), from a satellite image of Sep 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Dehui · AQI 240 (Very unhealthy)
Dehui's tree count comes to 24,480 trees across 12.56 km² of land, 37 points below the 45% tree-cover level considered healthy for this area, so roughly 116,750 more trees would close the gap.
Air quality detail
Air quality in Dehui today: AQI 240, Very unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 03:00 local time via Open-Meteo / CAMS, corrected with 8 ground-station cities within 225 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 8 station cities within 225 km, e.g. Songyuan and Jilin City
Health signal
Health alert — everyone should avoid long outdoor exertion.
PM2.5
145.3
PM10
72.6
NO₂
41.9
O₃
0.0
SO₂
15.1
CO
1129.0
- Outdoor exercise
- Everyone should avoid long or hard exercise outdoors; sensitive groups, all outdoor exertion
- Windows
- Keep them closed
- Mask
- Wear an N95 if you go out
- Air purifier
- Run one on high
Over the last 7 days, the CAMS air-quality model put Dehui's daily AQI at 92 on average, from 50 on Nov 6 to an hourly peak of 179 on Nov 10.
Where Dehui stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Dehui: Critically low
7.8% tree cover against a 45% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
24,480
Target trees
141,230
More trees needed
116,750
CO₂ if planted / yr
2,569 t
Deforestation · 2001–2025
How much forest has Dehui lost?
There was almost no forest around Dehui 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.
Forest gained and lost, 2000–2020
- Forest in 2000
- 88 ha
- Forest in 2020
- 122 ha
- Overall change
- +34 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Dehui grew from about 88 hectares to 122 hectares, a net gain of about 34 hectares. New forest grew on about 35 hectares, while 1 hectare 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 Dehui
What is the air quality (AQI) in Dehui right now?
The latest reading for Dehui shows an AQI of 240 (Very unhealthy), observed Nov 11, 03:00 local time via Open-Meteo / CAMS, corrected with 8 ground-station cities within 225 km, US EPA index. The main pollutant is PM2.5. Health alert — everyone should avoid long outdoor exertion.
Is it safe to exercise outside in Dehui today?
At AQI 240 (Very unhealthy): everyone should avoid long or hard exercise outdoors; sensitive groups, all outdoor exertion. Windows: keep them closed. Masks: wear an N95 if you go out. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Dehui been like this week?
Over the last 7 days, the CAMS air-quality model put Dehui's daily AQI at 92 on average, from 50 on Nov 6 to an hourly peak of 179 on Nov 10. On 2 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Dehui lost since 2001?
There was almost no forest around Dehui 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. Comparing satellite maps from 2000 and 2020, the forest around Dehui grew from about 88 hectares to 122 hectares, a net gain of about 34 hectares. New forest grew on about 35 hectares, while 1 hectare were lost.
What is the tree count in Dehui?
Dehui has an estimated 24,480 trees across the 12.56 km² of land measured — 7.8% tree cover, 37 percentage points short of the 45% tree-cover target set for this area.
How many more trees does Dehui need?
Dehui needs roughly 116,750 more trees to close a 37-point shortfall against its 45% tree-cover target — about 2,569 t of extra CO₂ absorbed per year once grown.
How are Dehui'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 Dehui; the tree count is an estimate derived from that cover.
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