City report · Henan, China
Jiyuan Air quality today
Air quality in Jiyuan currently reads AQI 75 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 75
Moderate
- PM2.5, fine particles (µg/m³)
- 28.3
- tree cover
- 15.6%
- trees in this area
- 49.0K
- more trees needed
- 45.2K
Measured across a 2 km radius around Jiyuan, Henan, China (12.57 km²), from a satellite image of Sep 6, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Jiyuan · AQI 75 (Moderate)
Jiyuan's tree count comes to 48,960 trees across 12.56 km² of land, 14 points below the 30% tree-cover level considered healthy for this area, so roughly 45,194 more trees would close the gap.
Air quality detail
Air quality in Jiyuan today: AQI 75, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 19:00 local time via Open-Meteo / CAMS, corrected with 12 ground-station cities within 245 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 12 station cities within 245 km, e.g. Luoyang and Jincheng
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
28.3
PM10
30.4
NO₂
54.3
O₃
21.0
SO₂
16.9
CO
768.0
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Jiyuan's daily AQI at 75 on average, from 41 on Nov 9 to an hourly peak of 155 on Nov 7.
Where Jiyuan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Jiyuan: Critically low
15.6% tree cover against a 30% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
48,960
Target trees
94,154
More trees needed
45,194
CO₂ if planted / yr
994.3 t
Deforestation · 2001–2025
How much forest has Jiyuan lost?
Since 2001, the area within 10 km of Jiyuan has lost about 5 hectares of forest (about 7 football pitches): 2.9% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (19%). About 2 hectares (38%) 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
- 5 haabout 7 football pitches
- Share of its forest
- 2.9%of what there was in 2000
- Cleared for good
- 2 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 3 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 | 1 ha | 2 ha | 3 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 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 | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 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 | under 1 ha | under 1 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 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 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 Jiyuan?
- Farms, pasture and plantationscleared for good19% · 1 ha
- Towns and roadscleared for good12% · under 1 ha
- Mining and energycleared for good5.8% · under 1 ha
Also: 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
- 1,280 ha
- Forest in 2020
- 1,760 ha
- Overall change
- +484 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Jiyuan grew from about 1,280 hectares to 1,760 hectares, a net gain of about 484 hectares (+38%). New forest grew on about 495 hectares, while 11 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 Jiyuan
What is the air quality (AQI) in Jiyuan right now?
The latest reading for Jiyuan shows an AQI of 75 (Moderate), observed Nov 11, 19:00 local time via Open-Meteo / CAMS, corrected with 12 ground-station cities within 245 km, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Jiyuan today?
At AQI 75 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Jiyuan been like this week?
Over the last 7 days, the CAMS air-quality model put Jiyuan's daily AQI at 75 on average, from 41 on Nov 9 to an hourly peak of 155 on Nov 7. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Jiyuan lost since 2001?
Since 2001, the area within 10 km of Jiyuan has lost about 5 hectares of forest (about 7 football pitches): 2.9% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (19%). About 2 hectares (38%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Jiyuan grew from about 1,280 hectares to 1,760 hectares, a net gain of about 484 hectares (+38%). New forest grew on about 495 hectares, while 11 hectares were lost.
What is the tree count in Jiyuan?
Jiyuan has an estimated 48,960 trees across the 12.56 km² of land measured — 15.6% tree cover, 14 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Jiyuan need?
Jiyuan needs roughly 45,194 more trees to close a 14-point shortfall against its 30% tree-cover target — about 994.3 t of extra CO₂ absorbed per year once grown.
How are Jiyuan'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 Jiyuan; the tree count is an estimate derived from that cover.
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