City report · Hubei, China
Shiyan Air quality today
Air quality in Shiyan currently reads AQI 92 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 92
Moderate
- PM2.5, fine particles (µg/m³)
- 31.1
- tree cover
- 40.3%
- trees in this area
- 126K
- more trees needed
- 0
Measured across a 2 km radius around Zhangwan District, Shiyan, Hubei, China (12.57 km²), from a satellite image of Sep 6, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Shiyan · AQI 92 (Moderate)
Shiyan's tree count comes to 126,480 trees across 12.56 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Shiyan today: AQI 92, Moderate
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 · Riverside Village , Shiyan, Hubei (十堰滨河新村), 300 m away · median of 3 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
31.1
PM10
59.0
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Hubei Environmental Protection Agency (湖北省环境保护厅)
- 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 Shiyan's daily AQI at 83 on average, from 54 on Nov 9 to an hourly peak of 157 on Nov 7.
Where Shiyan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Shiyan: Healthy tree cover
40.3% tree cover against a 30% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
126,480
Target trees
126,480
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Shiyan lost?
Since 2001, the area within 10 km of Shiyan has lost about 2,220 hectares of forest (about 3,100 football pitches): 15% of the forest it had in 2000. Most of it (97%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km north of the city center.
- Forest lost since 2001
- 2,220 haabout 3,100 football pitches
- Share of its forest
- 15%of what there was in 2000
- Cleared for good
- 2,160 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 85 hectares a year in 2021–2025, against 111 hectares a year in 2016–2020. The worst year was 2011, when about 496 hectares of forest were lost.
Shiyan's full deforestation reportHectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 2 ha | under 1 ha | 2 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | 2 ha | under 1 ha | 2 ha |
| 2004 | 10 ha | under 1 ha | 10 ha |
| 2005 | 21 ha | under 1 ha | 21 ha |
| 2006 | 19 ha | under 1 ha | 19 ha |
| 2007 | 51 ha | under 1 ha | 52 ha |
| 2008 | 48 ha | under 1 ha | 48 ha |
| 2009 | 45 ha | under 1 ha | 45 ha |
| 2010 | 25 ha | under 1 ha | 25 ha |
| 2011 | 495 ha | 1 ha | 496 ha |
| 2012 | 235 ha | 7 ha | 242 ha |
| 2013 | 109 ha | 1 ha | 110 ha |
| 2014 | 93 ha | under 1 ha | 93 ha |
| 2015 | 74 ha | 2 ha | 76 ha |
| 2016 | 126 ha | 3 ha | 129 ha |
| 2017 | 110 ha | 1 ha | 111 ha |
| 2018 | 53 ha | under 1 ha | 53 ha |
| 2019 | 157 ha | 5 ha | 162 ha |
| 2020 | 102 ha | under 1 ha | 102 ha |
| 2021 | 105 ha | 1 ha | 106 ha |
| 2022 | 80 ha | 3 ha | 83 ha |
| 2023 | 76 ha | 13 ha | 89 ha |
| 2024 | 65 ha | 9 ha | 74 ha |
| 2025 | 58 ha | 16 ha | 74 ha |
What is causing deforestation around Shiyan?
- Towns and roadscleared for good69% · 1,540 ha
- Mining and energycleared for good28% · 626 ha
- Loggingcan grow back2.6% · 58 ha
Also: farms, pasture and plantations, 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
- 23,000 ha
- Forest in 2020
- 19,600 ha
- Overall change
- −3,390 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Shiyan shrank from about 23,000 hectares to 19,600 hectares, a net loss of about 3,390 hectares (−15%). New forest grew on about 317 hectares, but 3,710 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 Shiyan
What is the air quality (AQI) in Shiyan right now?
The latest reading for Shiyan shows an AQI of 92 (Moderate), measured Nov 11, 22:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Riverside Village , Shiyan, Hubei (十堰滨河新村), 300 m away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Shiyan today?
At AQI 92 (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 Shiyan been like this week?
Over the last 7 days, the CAMS air-quality model put Shiyan's daily AQI at 83 on average, from 54 on Nov 9 to an hourly peak of 157 on Nov 7. On 2 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Shiyan lost since 2001?
Since 2001, the area within 10 km of Shiyan has lost about 2,220 hectares of forest (about 3,100 football pitches): 15% of the forest it had in 2000. Most of it (97%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss has stayed about the same: about 85 hectares a year in 2021–2025, against 111 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Shiyan shrank from about 23,000 hectares to 19,600 hectares, a net loss of about 3,390 hectares (−15%). New forest grew on about 317 hectares, but 3,710 hectares were lost.
What is the tree count in Shiyan?
Shiyan has an estimated 126,480 trees across the 12.56 km² of land measured — 40.3% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Shiyan need?
Shiyan has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Shiyan's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Zhangwan 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 Zhangwan District; the tree count is an estimate derived from that cover.
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