City report · Shanxi, China
Yongji Air quality today
Air quality in Yongji currently reads AQI 122 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Air quality right now
AQI 122
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 52.4
- tree cover
- 14.8%
- trees in this area
- 46.5K
- more trees needed
- 63.5K
Measured across a 2 km radius around Yongji, Shanxi, Yuncheng, Shanxi, China (12.57 km²), from a satellite image of Sep 14, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Yongji · AQI 122 (Unhealthy for sensitive groups)
Yongji's tree count comes to 46,496 trees across 12.57 km², 20 points below the 35% tree-cover level considered healthy for this area, so roughly 63,460 more trees would close the gap.
Air quality detail
Air quality in Yongji today: AQI 122, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 18:00 local time via Open-Meteo / CAMS, corrected with 14 ground-station cities within 250 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 14 station cities within 250 km, e.g. Weinan and Yuncheng
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
52.4
PM10
77.8
NO₂
57.0
O₃
18.0
SO₂
32.4
CO
644.0
- Outdoor exercise
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise
- Windows
- Close them to keep the outside air out
- Mask
- Sensitive groups: an N95 outdoors
- Air purifier
- Run one, especially in bedrooms
Over the last 7 days, the CAMS air-quality model put Yongji's daily AQI at 111 on average, from 73 on Nov 9 to an hourly peak of 180 on Nov 7.
Where Yongji stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Yongji: Critically low
14.8% tree cover against a 35% healthy-neighborhood target, across 12.57 km².
Trees in this area
46,496
Target trees
109,956
More trees needed
63,460
CO₂ if planted / yr
1,396 t
Deforestation · 2001–2025
How much forest has Yongji lost?
Since 2001, the area within 10 km of Yongji has lost about 50 hectares of forest (about 70 football pitches): under 1% of the forest it had in 2000. The biggest cause was logging (44%), after which forest can grow back. About 16 hectares (31%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 50 haabout 70 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- 16 hadeforestation: turned into farms, mines or towns
The worst year was 2006, when about 17 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 | 3 ha | 3 ha |
| 2002 | under 1 ha | 5 ha | 5 ha |
| 2003 | under 1 ha | 4 ha | 4 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | 17 ha | 17 ha |
| 2007 | under 1 ha | 3 ha | 3 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | 2 ha | 3 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | 9 ha | under 1 ha | 9 ha |
| 2020 | 4 ha | under 1 ha | 4 ha |
| 2021 | 1 ha | under 1 ha | 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 Yongji?
- Loggingcan grow back44% · 22 ha
- Mining and energycleared for good24% · 12 ha
- Storms, floods and other natural causescan grow back8% · 4 ha
Also: towns and roads, farms, pasture and plantations, wildfires, 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
- 9,120 ha
- Forest in 2020
- 9,230 ha
- Overall change
- +108 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Yongji stayed about the same size, at about 9,230 hectares: new forest grew on about 132 hectares, and about 23 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 Yongji
What is the air quality (AQI) in Yongji right now?
The latest reading for Yongji shows an AQI of 122 (Unhealthy for sensitive groups), observed Nov 11, 18:00 local time via Open-Meteo / CAMS, corrected with 14 ground-station cities within 250 km, US EPA index. The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Yongji today?
At AQI 122 (Unhealthy for sensitive groups): children, older adults and people with asthma or heart disease should cut down long or hard exercise. Windows: close them to keep the outside air out. Masks: sensitive groups: an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Yongji been like this week?
Over the last 7 days, the CAMS air-quality model put Yongji's daily AQI at 111 on average, from 73 on Nov 9 to an hourly peak of 180 on Nov 7. On 4 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Yongji lost since 2001?
Since 2001, the area within 10 km of Yongji has lost about 50 hectares of forest (about 70 football pitches): under 1% of the forest it had in 2000. The biggest cause was logging (44%), after which forest can grow back. About 16 hectares (31%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Yongji stayed about the same size, at about 9,230 hectares: new forest grew on about 132 hectares, and about 23 hectares were lost.
What is the tree count in Yongji?
Yongji has an estimated 46,496 trees across the 12.57 km² measured — 14.8% tree cover, 20 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Yongji need?
Yongji needs roughly 63,460 more trees to close a 20-point shortfall against its 35% tree-cover target — about 1,396 t of extra CO₂ absorbed per year once grown.
How are Yongji'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 Yongji; the tree count is an estimate derived from that cover.
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