City report · Qinghai, China
Tongren Air quality today
Air quality in Tongren currently reads AQI 27 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 27
Good
- PM2.5, fine particles (µg/m³)
- 6.1
- tree cover
- 5.5%
- trees in this area
- 17.3K
- more trees needed
- 76.9K
Measured across a 2 km radius around Tongren County, Huangnan Tibetan Autonomous Prefecture, Qinghai, China (12.57 km²), from a satellite image of Sep 18, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Tongren · AQI 27 (Good)
Tongren's tree count comes to 17,261 trees across 12.56 km² of land, 25 points below the 30% tree-cover level considered healthy for this area, so roughly 76,892 more trees would close the gap.
Air quality detail
Air quality in Tongren today: AQI 27, Good
Main pollutant: PM2.5 · Observed Nov 10, 21:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 245 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 3 station cities within 245 km, e.g. Xining and Lanzhou
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.1
PM10
3.7
NO₂
7.1
O₃
79.0
SO₂
2.2
CO
209.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Tongren's daily AQI at 38 on average, from 18 on Nov 10 to an hourly peak of 76 on Nov 4.
Where Tongren stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Tongren: Critically low
5.5% tree cover against a 30% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
17,261
Target trees
94,153
More trees needed
76,892
CO₂ if planted / yr
1,692 t
Deforestation · 2001–2025
How much forest has Tongren lost?
Almost no forest has been lost around Tongren since 2001: less than 1 hectare of the 308 hectares there in 2000.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
Forest gained and lost, 2000–2020
- Forest in 2000
- 861 ha
- Forest in 2020
- 890 ha
- Overall change
- +29 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Tongren grew from about 861 hectares to 890 hectares, a net gain of about 29 hectares (+3.4%). New forest grew on about 32 hectares, while 3 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 Tongren
What is the air quality (AQI) in Tongren right now?
The latest reading for Tongren shows an AQI of 27 (Good), observed Nov 10, 21:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 245 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Tongren today?
At AQI 27 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Tongren been like this week?
Over the last 7 days, the CAMS air-quality model put Tongren's daily AQI at 38 on average, from 18 on Nov 10 to an hourly peak of 76 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Tongren lost since 2001?
Almost no forest has been lost around Tongren since 2001: less than 1 hectare of the 308 hectares there in 2000. Comparing satellite maps from 2000 and 2020, the forest around Tongren grew from about 861 hectares to 890 hectares, a net gain of about 29 hectares (+3.4%). New forest grew on about 32 hectares, while 3 hectares were lost.
What is the tree count in Tongren?
Tongren has an estimated 17,261 trees across the 12.56 km² of land measured — 5.5% tree cover, 25 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Tongren need?
Tongren needs roughly 76,892 more trees to close a 25-point shortfall against its 30% tree-cover target — about 1,692 t of extra CO₂ absorbed per year once grown.
How are Tongren's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. 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 Tongren County; the tree count is an estimate derived from that cover.
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