City report · Tianjin, China
Tanggu Air quality today
Air quality in Tanggu currently reads AQI 163 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 163
Unhealthy
- PM2.5, fine particles (µg/m³)
- 72.9
- tree cover
- 8.0%
- trees in this area
- 23.1K
- more trees needed
- 92.4K
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.
Tanggu · AQI 163 (Unhealthy)
Tanggu's tree count comes to 23,097 trees across 11.55 km² of land, 32 points below the 40% tree-cover level considered healthy for this area, so roughly 92,388 more trees would close the gap.
Air quality detail
Air quality in Tanggu today: AQI 163, 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 · No.4 street, Tianjin (天津第四大街), 5.4 km away
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
72.9
PM10
121.7
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, China National Urban air quality real-time publishing platform (全国城市空气质量实时发布平台), Tianjin Environmental Monitoring Center (天津市环境监测中心)
- 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 Tanggu's daily AQI at 99 on average, from 72 on Nov 7 to an hourly peak of 163 on Nov 10.
Where Tanggu stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Tanggu: Critically low
8.0% tree cover against a 40% healthy-neighborhood target, across 11.55 km² of land.
Trees in this area
23,097
Target trees
115,485
More trees needed
92,388
CO₂ if planted / yr
2,033 t
Deforestation · 2001–2025
How much forest has Tanggu lost?
Since 2001, the area within 10 km of Tanggu has lost about 20 hectares of forest (about 28 football pitches): 16% of the forest it had in 2000. Most of it (81%) 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
- 20 haabout 28 football pitches
- Share of its forest
- 16%of what there was in 2000
- Cleared for good
- 16 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 | 10 ha | 2 ha | 11 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | 2 ha | under 1 ha | 2 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 | 1 ha | under 1 ha | 2 ha |
| 2008 | under 1 ha | under 1 ha | 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 Tanggu?
- Towns and roadscleared for good80% · 16 ha
- Unknown causescause unknown18% · 4 ha
Also: mining and energy.
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
- 242 ha
- Forest in 2020
- 806 ha
- Overall change
- +564 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Tanggu grew from about 242 hectares to 806 hectares, a net gain of about 564 hectares (+233%). New forest grew on about 566 hectares, while 1 hectare 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 Tanggu
What is the air quality (AQI) in Tanggu right now?
The latest reading for Tanggu shows an AQI of 163 (Unhealthy), measured Nov 11, 22:00 local time by the No.4 street, Tianjin (天津第四大街) ground monitoring station, 5.4 km away, via OpenAQ. The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Tanggu today?
At AQI 163 (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 Tanggu been like this week?
Over the last 7 days, the CAMS air-quality model put Tanggu'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 Tanggu lost since 2001?
Since 2001, the area within 10 km of Tanggu has lost about 20 hectares of forest (about 28 football pitches): 16% of the forest it had in 2000. Most of it (81%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Tanggu grew from about 242 hectares to 806 hectares, a net gain of about 564 hectares (+233%). New forest grew on about 566 hectares, while 1 hectare were lost.
What is the tree count in Tanggu?
Tanggu has an estimated 23,097 trees across the 11.55 km² of land measured — 8.0% tree cover, 32 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Tanggu need?
Tanggu needs roughly 92,388 more trees to close a 32-point shortfall against its 40% tree-cover target — about 2,033 t of extra CO₂ absorbed per year once grown.
How are Tanggu'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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