City report · Shaanxi, China
Tongchuanshi Air quality today
Air quality in Tongchuanshi currently reads AQI 173 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 173
Unhealthy
- PM2.5, fine particles (µg/m³)
- 87.5
- tree cover
- 21.4%
- trees in this area
- 67.2K
- more trees needed
- 58.4K
Measured across a 2 km radius around Wangyi District, Tongchuan, Shaanxi, China (12.57 km²), from a satellite image of Aug 30, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Tongchuanshi · AQI 173 (Unhealthy)
Tongchuanshi's tree count comes to 67,230 trees across 12.57 km², 19 points below the 40% tree-cover level considered healthy for this area, so roughly 58,434 more trees would close the gap.
Air quality detail
Air quality in Tongchuanshi today: AQI 173, Unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 22:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Wangyi District Government, Tongchuan (铜川王益区政府), 1.5 km away · median of 2 stations
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
87.5
PM10
119.7
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Shaanxi Provincial Environmental Protection Office (陕西省环保厅)
- Outdoor exercise
- Everyone should cut down long or hard exercise; sensitive groups should avoid it
- Windows
- Keep them closed
- Mask
- Wear an N95 outdoors
- Air purifier
- Run one
Over the last 7 days, the CAMS air-quality model put Tongchuanshi's daily AQI at 82 on average, from 42 on Nov 8 to an hourly peak of 147 on Nov 5.
Where Tongchuanshi stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Tongchuanshi: Critically low
21.4% tree cover against a 40% healthy-neighborhood target, across 12.57 km².
Trees in this area
67,230
Target trees
125,664
More trees needed
58,434
CO₂ if planted / yr
1,286 t
Deforestation · 2001–2025
How much forest has Tongchuanshi lost?
Since 2001, the area within 10 km of Tongchuanshi has lost about 32 hectares of forest (about 45 football pitches): 2.5% of the forest it had in 2000. Most of it (91%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 32 haabout 45 football pitches
- Share of its forest
- 2.5%of what there was in 2000
- Cleared for good
- 29 hadeforestation: turned into farms, mines or towns
The worst year was 2019, when about 18 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 | under 1 ha | under 1 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 | 2 ha | under 1 ha | 2 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | 2 ha | under 1 ha | 2 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 | 1 ha |
| 2018 | 1 ha | under 1 ha | 1 ha |
| 2019 | 16 ha | 1 ha | 18 ha |
| 2020 | 2 ha | under 1 ha | 2 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | 2 ha | under 1 ha | 2 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 Tongchuanshi?
- Towns and roadscleared for good73% · 23 ha
- Farms, pasture and plantationscleared for good10% · 3 ha
- Mining and energycleared for good7.8% · 3 ha
Also: logging, 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
- 7,900 ha
- Forest in 2020
- 8,200 ha
- Overall change
- +300 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Tongchuanshi grew from about 7,900 hectares to 8,200 hectares, a net gain of about 300 hectares (+3.8%). New forest grew on about 386 hectares, while 86 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 Tongchuanshi
What is the air quality (AQI) in Tongchuanshi right now?
The latest reading for Tongchuanshi shows an AQI of 173 (Unhealthy), measured Nov 11, 22:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Wangyi District Government, Tongchuan (铜川王益区政府), 1.5 km away). The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Tongchuanshi today?
At AQI 173 (Unhealthy): everyone should cut down long or hard exercise; sensitive groups should avoid it. Windows: keep them closed. Masks: wear an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Tongchuanshi been like this week?
Over the last 7 days, the CAMS air-quality model put Tongchuanshi's daily AQI at 82 on average, from 42 on Nov 8 to an hourly peak of 147 on Nov 5. On 2 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Tongchuanshi lost since 2001?
Since 2001, the area within 10 km of Tongchuanshi has lost about 32 hectares of forest (about 45 football pitches): 2.5% of the forest it had in 2000. Most of it (91%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Tongchuanshi grew from about 7,900 hectares to 8,200 hectares, a net gain of about 300 hectares (+3.8%). New forest grew on about 386 hectares, while 86 hectares were lost.
What is the tree count in Tongchuanshi?
Tongchuanshi has an estimated 67,230 trees across the 12.57 km² measured — 21.4% tree cover, 19 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Tongchuanshi need?
Tongchuanshi needs roughly 58,434 more trees to close a 19-point shortfall against its 40% tree-cover target — about 1,286 t of extra CO₂ absorbed per year once grown.
How are Tongchuanshi's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Wangyi District, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 Wangyi District; the tree count is an estimate derived from that cover.
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