City report · Tianjin, China
Tianjin Air quality today
Air quality in Tianjin currently reads AQI 170 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 170
Unhealthy
- PM2.5, fine particles (µg/m³)
- 82.6
- tree cover
- 17.2%
- trees in this area
- 53.0K
- more trees needed
- 70.3K
Measured across a 2 km radius around China, 天津市南开区老城厢 (12.57 km²), from a satellite image of Sep 15, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Tianjin · AQI 170 (Unhealthy)
Tianjin's tree count comes to 53,009 trees across 12.33 km² of land, 23 points below the 40% tree-cover level considered healthy for this area, so roughly 70,267 more trees would close the gap.
Air quality detail
Air quality in Tianjin today: AQI 170, 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 · Qinjian street, Tianjin (天津勤俭道), 3.8 km away · median of 4 stations
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
82.6
PM10
124.7
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 Tianjin's daily AQI at 127 on average, from 105 on Nov 8 to an hourly peak of 229 on Nov 8.
Where Tianjin stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Tianjin: Critically low
17.2% tree cover against a 40% healthy-neighborhood target, across 12.33 km² of land.
Trees in this area
53,009
Target trees
123,276
More trees needed
70,267
CO₂ if planted / yr
1,546 t
Deforestation · 2001–2025
How much forest has Tianjin lost?
Since 2001, the area within 10 km of Tianjin has lost about 19 hectares of forest (about 27 football pitches): 8.8% of the forest it had in 2000. The biggest cause was towns and roads (38%). About 7 hectares (38%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 19 haabout 27 football pitches
- Share of its forest
- 8.8%of what there was in 2000
- Cleared for good
- 7 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 10 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 | 4 ha | 6 ha | 10 ha |
| 2002 | 1 ha | 2 ha | 3 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | 1 ha |
| 2005 | under 1 ha | under 1 ha | 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 | 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 Tianjin?
- Towns and roadscleared for good38% · 7 ha
- Unknown causescause unknown61% · 12 ha
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
- 702 ha
- Forest in 2020
- 1,600 ha
- Overall change
- +896 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Tianjin grew from about 702 hectares to 1,600 hectares, a net gain of about 896 hectares (+128%). New forest grew on about 900 hectares, while 5 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 Tianjin
What is the air quality (AQI) in Tianjin right now?
The latest reading for Tianjin shows an AQI of 170 (Unhealthy), measured Nov 11, 22:00 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Qinjian street, Tianjin (天津勤俭道), 3.8 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 Tianjin today?
At AQI 170 (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 Tianjin been like this week?
Over the last 7 days, the CAMS air-quality model put Tianjin's daily AQI at 127 on average, from 105 on Nov 8 to an hourly peak of 229 on Nov 8. On 7 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Tianjin lost since 2001?
Since 2001, the area within 10 km of Tianjin has lost about 19 hectares of forest (about 27 football pitches): 8.8% of the forest it had in 2000. The biggest cause was towns and roads (38%). About 7 hectares (38%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Tianjin grew from about 702 hectares to 1,600 hectares, a net gain of about 896 hectares (+128%). New forest grew on about 900 hectares, while 5 hectares were lost.
What is the tree count in Tianjin?
Tianjin has an estimated 53,009 trees across the 12.33 km² of land measured — 17.2% tree cover, 23 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Tianjin need?
Tianjin needs roughly 70,267 more trees to close a 23-point shortfall against its 40% tree-cover target — about 1,546 t of extra CO₂ absorbed per year once grown.
How are Tianjin's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near China, 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 China; the tree count is an estimate derived from that cover.
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