City report · Heilongjiang, China
Longjiang Air quality today
Air quality in Longjiang currently reads AQI 199 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 199
Unhealthy
- PM2.5, fine particles (µg/m³)
- 123.1
- tree cover
- 8.0%
- trees in this area
- 25.1K
- more trees needed
- 100K
Measured across a 2 km radius around Longjiang County, Qiqihar, 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.
Longjiang · AQI 199 (Unhealthy)
Longjiang's tree count comes to 25,082 trees across 12.54 km² of land, 32 points below the 40% tree-cover level considered healthy for this area, so roughly 100,330 more trees would close the gap.
Air quality detail
Air quality in Longjiang today: AQI 199, Unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 00:00 local time via Open-Meteo / CAMS, corrected with 6 ground-station cities within 205 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 6 station cities within 205 km, e.g. Qiqihar and Daqing
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
123.1
PM10
38.4
NO₂
54.7
O₃
2.0
SO₂
11.7
CO
618.0
- 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 Longjiang's daily AQI at 70 on average, from 51 on Nov 9 to an hourly peak of 108 on Nov 6.
Where Longjiang stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Longjiang: Critically low
8.0% tree cover against a 40% healthy-neighborhood target, across 12.54 km² of land.
Trees in this area
25,082
Target trees
125,412
More trees needed
100,330
CO₂ if planted / yr
2,207 t
Deforestation · 2001–2025
How much forest has Longjiang lost?
There was almost no forest around Longjiang 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 July 2017 of a 5 × 5 km area in the city center.
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. Images: contains modified Copernicus Sentinel data. How it's measured
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Frequently asked
Questions about Longjiang
What is the air quality (AQI) in Longjiang right now?
The latest reading for Longjiang shows an AQI of 199 (Unhealthy), observed Nov 11, 00:00 local time via Open-Meteo / CAMS, corrected with 6 ground-station cities within 205 km, US EPA index. The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Longjiang today?
At AQI 199 (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 Longjiang been like this week?
Over the last 7 days, the CAMS air-quality model put Longjiang's daily AQI at 70 on average, from 51 on Nov 9 to an hourly peak of 108 on Nov 6. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Longjiang lost since 2001?
There was almost no forest around Longjiang 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.
What is the tree count in Longjiang?
Longjiang has an estimated 25,082 trees across the 12.54 km² of land measured — 8.0% tree cover, 32 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Longjiang need?
Longjiang needs roughly 100,330 more trees to close a 32-point shortfall against its 40% tree-cover target — about 2,207 t of extra CO₂ absorbed per year once grown.
How are Longjiang'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 Longjiang County; the tree count is an estimate derived from that cover.
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