City report · Shaanxi, China
Hancheng Air quality today
Air quality in Hancheng currently reads AQI 91 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 91
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 29.8
- tree cover
- 12.0%
- trees in this area
- 37.7K
- more trees needed
- 56.5K
Measured across a 2 km radius around Hancheng, Weinan, Shaanxi, China (12.57 km²), from a satellite image of Sep 6, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Hancheng · AQI 91 (Moderate)
Hancheng's tree count comes to 37,699 trees across 12.57 km², 18 points below the 30% tree-cover level considered healthy for this area, so roughly 56,549 more trees would close the gap.
Air quality detail
Air quality in Hancheng today: AQI 91, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 00:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 125 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 3 station cities within 125 km, e.g. Yuncheng and Sanmenxia
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
29.8
PM10
25.4
NO₂
20.4
O₃
38.0
SO₂
6.5
CO
503.0
- 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 Hancheng's daily AQI at 70 on average, from 37 on Nov 9 to an hourly peak of 135 on Nov 7.
Where Hancheng stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hancheng: Critically low
12.0% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
37,699
Target trees
94,248
More trees needed
56,549
CO₂ if planted / yr
1,244 t
Deforestation · 2001–2025
How much forest has Hancheng lost?
Since 2001, the area within 10 km of Hancheng has lost about 35 hectares of forest (about 48 football pitches): 17% of the forest it had in 2000. Most of it (69%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 35 haabout 48 football pitches
- Share of its forest
- 17%of what there was in 2000
- Cleared for good
- 24 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 8 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 | 5 ha | 3 ha | 8 ha |
| 2002 | 4 ha | 2 ha | 6 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 5 ha | 2 ha | 8 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 | 2 ha | under 1 ha | 3 ha |
| 2010 | 5 ha | 1 ha | 6 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 Hancheng?
- Towns and roadscleared for good39% · 14 ha
- Farms, pasture and plantationscleared for good28% · 10 ha
- Unknown causescause unknown31% · 11 ha
Also: mining and energy, storms, floods and other natural 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
- 1,460 ha
- Forest in 2020
- 1,630 ha
- Overall change
- +170 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hancheng grew from about 1,460 hectares to 1,630 hectares, a net gain of about 170 hectares (+12%). New forest grew on about 202 hectares, while 33 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 Hancheng
What is the air quality (AQI) in Hancheng right now?
The latest reading for Hancheng shows an AQI of 91 (Moderate), observed Nov 11, 00:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 125 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 Hancheng today?
At AQI 91 (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 Hancheng been like this week?
Over the last 7 days, the CAMS air-quality model put Hancheng's daily AQI at 70 on average, from 37 on Nov 9 to an hourly peak of 135 on Nov 7. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Hancheng lost since 2001?
Since 2001, the area within 10 km of Hancheng has lost about 35 hectares of forest (about 48 football pitches): 17% of the forest it had in 2000. Most of it (69%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Hancheng grew from about 1,460 hectares to 1,630 hectares, a net gain of about 170 hectares (+12%). New forest grew on about 202 hectares, while 33 hectares were lost.
What is the tree count in Hancheng?
Hancheng has an estimated 37,699 trees across the 12.57 km² measured — 12.0% tree cover, 18 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Hancheng need?
Hancheng needs roughly 56,549 more trees to close a 18-point shortfall against its 30% tree-cover target — about 1,244 t of extra CO₂ absorbed per year once grown.
How are Hancheng'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 Hancheng; the tree count is an estimate derived from that cover.
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