City report · Henan, China
Kaifeng Air quality today
Air quality in Kaifeng currently reads AQI 154 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 154
Unhealthy
- PM2.5, fine particles (µg/m³)
- 59.4
- tree cover
- 14.8%
- trees in this area
- 46.2K
- more trees needed
- 78.6K
Measured across a 2 km radius around Longting District, Kaifeng, Henan, China (12.57 km²), from a satellite image of Sep 10, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Kaifeng · AQI 154 (Unhealthy)
Kaifeng's tree count comes to 46,170 trees across 12.48 km² of land, 25 points below the 40% tree-cover level considered healthy for this area, so roughly 78,614 more trees would close the gap.
Air quality detail
Air quality in Kaifeng today: AQI 154, 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 · Kaifeng (开封), 200 m away · median of 2 stations
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
59.4
PM10
87.3
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Henan Environmental Protection Agency (河南环保 > 网站首页)
- 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 Kaifeng's daily AQI at 104 on average, from 74 on Nov 8 to an hourly peak of 161 on Nov 6.
Where Kaifeng stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Kaifeng: Critically low
14.8% tree cover against a 40% healthy-neighborhood target, across 12.48 km² of land.
Trees in this area
46,170
Target trees
124,784
More trees needed
78,614
CO₂ if planted / yr
1,730 t
Deforestation · 2001–2025
How much forest has Kaifeng lost?
There was almost no forest around Kaifeng in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
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
- 379 ha
- Forest in 2020
- 1,110 ha
- Overall change
- +726 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Kaifeng grew from about 379 hectares to 1,110 hectares, a net gain of about 726 hectares (+192%). New forest grew on about 726 hectares, while under 1 hectare was 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 Kaifeng
What is the air quality (AQI) in Kaifeng right now?
The latest reading for Kaifeng shows an AQI of 154 (Unhealthy), measured Nov 11, 22:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Kaifeng (开封), 200 m away). The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Kaifeng today?
At AQI 154 (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 Kaifeng been like this week?
Over the last 7 days, the CAMS air-quality model put Kaifeng's daily AQI at 104 on average, from 74 on Nov 8 to an hourly peak of 161 on Nov 6. On 3 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Kaifeng lost since 2001?
There was almost no forest around Kaifeng in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here. Comparing satellite maps from 2000 and 2020, the forest around Kaifeng grew from about 379 hectares to 1,110 hectares, a net gain of about 726 hectares (+192%). New forest grew on about 726 hectares, while under 1 hectare was lost.
What is the tree count in Kaifeng?
Kaifeng has an estimated 46,170 trees across the 12.48 km² of land measured — 14.8% tree cover, 25 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Kaifeng need?
Kaifeng needs roughly 78,614 more trees to close a 25-point shortfall against its 40% tree-cover target — about 1,730 t of extra CO₂ absorbed per year once grown.
How are Kaifeng's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Longting District, 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 Longting District; the tree count is an estimate derived from that cover.
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