City report · Heilongjiang, China
Longfeng Air quality today
Air quality in Longfeng currently reads AQI 240 (Very unhealthy): Health alert — everyone should avoid long outdoor exertion.
Air quality right now
AQI 240
Very unhealthy
- PM2.5, fine particles (µg/m³)
- 164.6
- tree cover
- 11.6%
- trees in this area
- 35.0K
- more trees needed
- 101K
Measured across a 2 km radius around Longfeng District, Daqing, Heilongjiang, China (12.57 km²), from a satellite image of Sep 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Longfeng · AQI 240 (Very unhealthy)
Longfeng's tree count comes to 35,021 trees across 12.08 km² of land, 33 points below the 45% tree-cover level considered healthy for this area, so roughly 100,837 more trees would close the gap.
Air quality detail
Air quality in Longfeng today: AQI 240, Very unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 21:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Longfeng District, Daqing (大庆龙凤区), 800 m away · median of 2 stations
Health signal
Health alert — everyone should avoid long outdoor exertion.
PM2.5
164.6
PM10
219.7
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Helongjiang Environmental Protection Agency (黑龙江省空气质量实时发布平台)
- Outdoor exercise
- Everyone should avoid long or hard exercise outdoors; sensitive groups, all outdoor exertion
- Windows
- Keep them closed
- Mask
- Wear an N95 if you go out
- Air purifier
- Run one on high
Over the last 7 days, the CAMS air-quality model put Longfeng's daily AQI at 84 on average, from 58 on Nov 9 to an hourly peak of 149 on Nov 10.
Where Longfeng stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Longfeng: Critically low
11.6% tree cover against a 45% healthy-neighborhood target, across 12.08 km² of land.
Trees in this area
35,021
Target trees
135,858
More trees needed
100,837
CO₂ if planted / yr
2,218 t
Deforestation · 2001–2025
How much forest has Longfeng lost?
There was almost no forest around Longfeng 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
- 31 ha
- Forest in 2020
- 129 ha
- Overall change
- +98 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Longfeng grew from about 31 hectares to 129 hectares, a net gain of about 98 hectares. New forest grew on about 97 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 Longfeng
What is the air quality (AQI) in Longfeng right now?
The latest reading for Longfeng shows an AQI of 240 (Very unhealthy), measured Nov 11, 21:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Longfeng District, Daqing (大庆龙凤区), 800 m away). The main pollutant is PM2.5. Health alert — everyone should avoid long outdoor exertion.
Is it safe to exercise outside in Longfeng today?
At AQI 240 (Very unhealthy): everyone should avoid long or hard exercise outdoors; sensitive groups, all outdoor exertion. Windows: keep them closed. Masks: wear an N95 if you go out. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Longfeng been like this week?
Over the last 7 days, the CAMS air-quality model put Longfeng's daily AQI at 84 on average, from 58 on Nov 9 to an hourly peak of 149 on Nov 10. On 2 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Longfeng lost since 2001?
There was almost no forest around Longfeng 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 Longfeng grew from about 31 hectares to 129 hectares, a net gain of about 98 hectares. New forest grew on about 97 hectares, while under 1 hectare was lost.
What is the tree count in Longfeng?
Longfeng has an estimated 35,021 trees across the 12.08 km² of land measured — 11.6% tree cover, 33 percentage points short of the 45% tree-cover target set for this area.
How many more trees does Longfeng need?
Longfeng needs roughly 100,837 more trees to close a 33-point shortfall against its 45% tree-cover target — about 2,218 t of extra CO₂ absorbed per year once grown.
How are Longfeng's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Longfeng 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 Longfeng District; the tree count is an estimate derived from that cover.
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