City report · Henan, China
Zhengzhou Air quality today
Air quality in Zhengzhou currently reads AQI 149 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Air quality right now
AQI 149
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 54.8
- tree cover
- 19.1%
- trees in this area
- 59.9K
- more trees needed
- 49.9K
Measured across a 2 km radius around Erqi District, Zhengzhou, Henan, China (12.57 km²), from a satellite image of Sep 3, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Zhengzhou · AQI 149 (Unhealthy for sensitive groups)
Zhengzhou's tree count comes to 59,944 trees across 12.56 km² of land, 16 points below the 35% tree-cover level considered healthy for this area, so roughly 49,901 more trees would close the gap.
Air quality detail
Air quality in Zhengzhou today: AQI 149, Unhealthy for sensitive groups
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 · Henan Medical University, Zhengzhou (郑州河医大), 1.3 km away · median of 6 stations
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
54.8
PM10
63.1
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Henan Environmental Protection Agency (河南环保 > 网站首页)
- Outdoor exercise
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise
- Windows
- Close them to keep the outside air out
- Mask
- Sensitive groups: an N95 outdoors
- Air purifier
- Run one, especially in bedrooms
Over the last 7 days, the CAMS air-quality model put Zhengzhou's daily AQI at 120 on average, from 93 on Nov 10 to an hourly peak of 163 on Nov 7.
Where Zhengzhou stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Zhengzhou: Critically low
19.1% tree cover against a 35% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
59,944
Target trees
109,845
More trees needed
49,901
CO₂ if planted / yr
1,098 t
Deforestation · 2001–2025
How much forest has Zhengzhou lost?
There was almost no forest around Zhengzhou 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
- 816 ha
- Forest in 2020
- 1,660 ha
- Overall change
- +843 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Zhengzhou grew from about 816 hectares to 1,660 hectares, a net gain of about 843 hectares (+103%). New forest grew on about 845 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 Zhengzhou
What is the air quality (AQI) in Zhengzhou right now?
The latest reading for Zhengzhou shows an AQI of 149 (Unhealthy for sensitive groups), measured Nov 11, 22:00 local time by 6 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Henan Medical University, Zhengzhou (郑州河医大), 1.3 km away). The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Zhengzhou today?
At AQI 149 (Unhealthy for sensitive groups): children, older adults and people with asthma or heart disease should cut down long or hard exercise. Windows: close them to keep the outside air out. Masks: sensitive groups: an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Zhengzhou been like this week?
Over the last 7 days, the CAMS air-quality model put Zhengzhou's daily AQI at 120 on average, from 93 on Nov 10 to an hourly peak of 163 on Nov 7. On 6 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Zhengzhou lost since 2001?
There was almost no forest around Zhengzhou 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 Zhengzhou grew from about 816 hectares to 1,660 hectares, a net gain of about 843 hectares (+103%). New forest grew on about 845 hectares, while 3 hectares were lost.
What is the tree count in Zhengzhou?
Zhengzhou has an estimated 59,944 trees across the 12.56 km² of land measured — 19.1% tree cover, 16 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Zhengzhou need?
Zhengzhou needs roughly 49,901 more trees to close a 16-point shortfall against its 35% tree-cover target — about 1,098 t of extra CO₂ absorbed per year once grown.
How are Zhengzhou's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Erqi 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 Erqi District; the tree count is an estimate derived from that cover.
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