City report · Tianjin, China
Hangu Air quality today
Air quality in Hangu currently reads AQI 162 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 162
Unhealthy
- PM2.5, fine particles (µg/m³)
- 71.0
- tree cover
- 5.5%
- trees in this area
- 15.3K
- more trees needed
- 96.2K
Measured across a 2 km radius around Binhai, Tianjin, China (12.57 km²), from a satellite image of Sep 15, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Hangu · AQI 162 (Unhealthy)
Hangu's tree count comes to 15,344 trees across 11.16 km² of land, 35 points below the 40% tree-cover level considered healthy for this area, so roughly 96,246 more trees would close the gap.
Air quality detail
Air quality in Hangu today: AQI 162, 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 · Hexi Yijing road, Tianjin (天津河西一经路), 300 m away · median of 2 stations
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
71.0
PM10
125.8
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Tianjin Environmental Monitoring Center (天津市环境监测中心), China National Urban air quality real-time publishing platform (全国城市空气质量实时发布平台)
- 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 Hangu's daily AQI at 99 on average, from 72 on Nov 7 to an hourly peak of 163 on Nov 10.
Where Hangu stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hangu: Critically low
5.5% tree cover against a 40% healthy-neighborhood target, across 11.16 km² of land.
Trees in this area
15,344
Target trees
111,590
More trees needed
96,246
CO₂ if planted / yr
2,117 t
Deforestation · 2001–2025
How much forest has Hangu lost?
Since 2001, the area within 10 km of Hangu has lost about 21 hectares of forest (about 30 football pitches): 15% of the forest it had in 2000. Most of it (61%) 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
- 21 haabout 30 football pitches
- Share of its forest
- 15%of what there was in 2000
- Cleared for good
- 13 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 11 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 | 7 ha | 4 ha | 11 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | 2 ha | under 1 ha | 3 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 | 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | 1 ha |
| 2009 | 2 ha | under 1 ha | 3 ha |
| 2010 | under 1 ha | under 1 ha | 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 Hangu?
- Towns and roadscleared for good54% · 12 ha
- Storms, floods and other natural causescan grow back12% · 3 ha
- Farms, pasture and plantationscleared for good6.5% · 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
- 151 ha
- Forest in 2020
- 371 ha
- Overall change
- +220 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hangu grew from about 151 hectares to 371 hectares, a net gain of about 220 hectares (+146%). New forest grew on about 221 hectares, while under 1 hectare was 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 Hangu
What is the air quality (AQI) in Hangu right now?
The latest reading for Hangu shows an AQI of 162 (Unhealthy), measured Nov 11, 22:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Hexi Yijing road, Tianjin (天津河西一经路), 300 m away). The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Hangu today?
At AQI 162 (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 Hangu been like this week?
Over the last 7 days, the CAMS air-quality model put Hangu's daily AQI at 99 on average, from 72 on Nov 7 to an hourly peak of 163 on Nov 10. On 4 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Hangu lost since 2001?
Since 2001, the area within 10 km of Hangu has lost about 21 hectares of forest (about 30 football pitches): 15% of the forest it had in 2000. Most of it (61%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Hangu grew from about 151 hectares to 371 hectares, a net gain of about 220 hectares (+146%). New forest grew on about 221 hectares, while under 1 hectare was lost.
What is the tree count in Hangu?
Hangu has an estimated 15,344 trees across the 11.16 km² of land measured — 5.5% tree cover, 35 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Hangu need?
Hangu needs roughly 96,246 more trees to close a 35-point shortfall against its 40% tree-cover target — about 2,117 t of extra CO₂ absorbed per year once grown.
How are Hangu's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Binhai, 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 Binhai; the tree count is an estimate derived from that cover.
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