City report · Gansu, China
Tianshui Air quality today
Air quality in Tianshui currently reads AQI 86 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 86
Moderate
- PM2.5, fine particles (µg/m³)
- 30.0
- tree cover
- 31.4%
- trees in this area
- 98.0K
- more trees needed
- 0
Measured across a 2 km radius around Qinzhou District, Tianshui, Gansu, China (12.57 km²), from a satellite image of Sep 2, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Tianshui · AQI 86 (Moderate)
Tianshui's tree count comes to 97,955 trees across 12.48 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Tianshui today: AQI 86, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 00:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 205 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 3 station cities within 205 km, e.g. Pingliang and Baoji
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
30.0
PM10
23.6
NO₂
14.5
O₃
50.0
SO₂
8.1
CO
904.0
- 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 Tianshui's daily AQI at 58 on average, from 42 on Nov 8 to an hourly peak of 101 on Nov 5.
Where Tianshui stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Tianshui: Healthy tree cover
31.4% tree cover against a 30% healthy-neighborhood target, across 12.48 km² of land.
Trees in this area
97,955
Target trees
97,955
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Tianshui lost?
Almost no forest has been lost around Tianshui since 2001: less than 1 hectare of the 125 hectares there in 2000.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
Forest gained and lost, 2000–2020
- Forest in 2000
- 1,480 ha
- Forest in 2020
- 1,860 ha
- Overall change
- +385 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Tianshui grew from about 1,480 hectares to 1,860 hectares, a net gain of about 385 hectares (+26%). New forest grew on about 404 hectares, while 18 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 Tianshui
What is the air quality (AQI) in Tianshui right now?
The latest reading for Tianshui shows an AQI of 86 (Moderate), observed Nov 11, 00:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 205 km, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Tianshui today?
At AQI 86 (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 Tianshui been like this week?
Over the last 7 days, the CAMS air-quality model put Tianshui's daily AQI at 58 on average, from 42 on Nov 8 to an hourly peak of 101 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Tianshui lost since 2001?
Almost no forest has been lost around Tianshui since 2001: less than 1 hectare of the 125 hectares there in 2000. Comparing satellite maps from 2000 and 2020, the forest around Tianshui grew from about 1,480 hectares to 1,860 hectares, a net gain of about 385 hectares (+26%). New forest grew on about 404 hectares, while 18 hectares were lost.
What is the tree count in Tianshui?
Tianshui has an estimated 97,955 trees across the 12.48 km² of land measured — 31.4% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Tianshui need?
Tianshui has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Tianshui'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 Qinzhou District; the tree count is an estimate derived from that cover.
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