City report · Yunnan, China
Kaiyuan Air quality today
Air quality in Kaiyuan currently reads AQI 64 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 64
Moderate
- PM2.5, fine particles (µg/m³)
- 17.6
- tree cover
- 54.4%
- trees in this area
- 171K
- more trees needed
- 0
Measured across a 2 km radius around Kaiyuan, Honghe Hani and Yi Autonomous Prefecture, Yunnan, China (12.57 km²), from a satellite image of Sep 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Kaiyuan · AQI 64 (Moderate)
Kaiyuan's tree count comes to 170,903 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Kaiyuan today: AQI 64, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 17:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 125 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 4 station cities within 125 km, e.g. Honghe Hani and Yi Autonomous Prefecture and Honghe Hani and Yi Autonomous Prefecture
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
17.6
PM10
7.5
NO₂
12.5
O₃
59.0
SO₂
7.6
CO
311.0
- 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 Kaiyuan's daily AQI at 33 on average, from 11 on Nov 9 to an hourly peak of 74 on Nov 5.
Where Kaiyuan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Kaiyuan: Healthy tree cover
54.4% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
170,903
Target trees
170,903
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Kaiyuan lost?
Since 2001, the area within 10 km of Kaiyuan has lost about 141 hectares of forest (about 200 football pitches): 5.7% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 36 hectares (26%) was deforestation: forest cleared for good for farms, mines or towns.
2018: satellite photo from February 2018 of a 5 × 5 km area about 7 km northeast of the city center.
- Forest lost since 2001
- 141 haabout 200 football pitches
- Share of its forest
- 5.7%of what there was in 2000
- Cleared for good
- 36 hadeforestation: turned into farms, mines or towns
The worst year was 2024, when about 20 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 | under 1 ha | under 1 ha | under 1 ha |
| 2002 | under 1 ha | 1 ha | 2 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | 2 ha | 2 ha | 3 ha |
| 2006 | 3 ha | 1 ha | 4 ha |
| 2007 | under 1 ha | 2 ha | 2 ha |
| 2008 | 5 ha | 2 ha | 7 ha |
| 2009 | 6 ha | 5 ha | 11 ha |
| 2010 | under 1 ha | under 1 ha | 1 ha |
| 2011 | 2 ha | 5 ha | 7 ha |
| 2012 | 4 ha | 4 ha | 7 ha |
| 2013 | 1 ha | 2 ha | 3 ha |
| 2014 | under 1 ha | 6 ha | 6 ha |
| 2015 | under 1 ha | under 1 ha | 1 ha |
| 2016 | 1 ha | 15 ha | 16 ha |
| 2017 | under 1 ha | 2 ha | 3 ha |
| 2018 | under 1 ha | under 1 ha | 1 ha |
| 2019 | under 1 ha | 3 ha | 3 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | 4 ha | 5 ha |
| 2022 | 2 ha | 11 ha | 13 ha |
| 2023 | 3 ha | 15 ha | 18 ha |
| 2024 | 1 ha | 19 ha | 20 ha |
| 2025 | under 1 ha | 5 ha | 5 ha |
What is causing deforestation around Kaiyuan?
- Loggingcan grow back66% · 94 ha
- Farms, pasture and plantationscleared for good25% · 36 ha
- Wildfirescan grow back7.4% · 10 ha
Also: towns and roads, 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
- 6,290 ha
- Forest in 2020
- 8,020 ha
- Overall change
- +1,730 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Kaiyuan grew from about 6,290 hectares to 8,020 hectares, a net gain of about 1,730 hectares (+28%). New forest grew on about 1,960 hectares, while 232 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
In the same region
Measured cities near Kaiyuan
Same 2 km radius, same index — so they compare directly.
- Mengzi37.5 km
China
- Tree cover
- 24%
- Air quality
- 77
- Gejiu40.5 km
China
- Tree cover
- 42%
- Air quality
- 77
- Jianshui49.8 km
China
- Tree cover
- 20%
- Air quality
- 85
- Wenshan City103.4 km
China
- Tree cover
- 31%
- Air quality
- 60
- Yuxi106.4 km
China
- Tree cover
- 16%
- Air quality
- 53
- Haikou, Yunnan141.2 km
China
- Tree cover
- 30%
- Air quality
- 56
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Frequently asked
Questions about Kaiyuan
What is the air quality (AQI) in Kaiyuan right now?
The latest reading for Kaiyuan shows an AQI of 64 (Moderate), observed Nov 10, 17:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 125 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 Kaiyuan today?
At AQI 64 (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 Kaiyuan been like this week?
Over the last 7 days, the CAMS air-quality model put Kaiyuan's daily AQI at 33 on average, from 11 on Nov 9 to an hourly peak of 74 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 Kaiyuan lost since 2001?
Since 2001, the area within 10 km of Kaiyuan has lost about 141 hectares of forest (about 200 football pitches): 5.7% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 36 hectares (26%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Kaiyuan grew from about 6,290 hectares to 8,020 hectares, a net gain of about 1,730 hectares (+28%). New forest grew on about 1,960 hectares, while 232 hectares were lost.
What is the tree count in Kaiyuan?
Kaiyuan has an estimated 170,903 trees across the 12.57 km² measured — 54.4% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Kaiyuan need?
Kaiyuan has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Kaiyuan'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 Kaiyuan; the tree count is an estimate derived from that cover.
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