City report · Heilongjiang, China
Hengshan Air quality today
Air quality in Hengshan currently reads AQI 177 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 177
Unhealthy
- PM2.5, fine particles (µg/m³)
- 98.2
- tree cover
- 40.6%
- trees in this area
- 127K
- more trees needed
- 0
Measured across a 2 km radius around Hengshan District, Jixi, Jixi, Heilongjiang, China (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Hengshan · AQI 177 (Unhealthy)
Hengshan's tree count comes to 127,421 trees across 12.56 km² of land, already at or above the 40% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Hengshan today: AQI 177, Unhealthy
Main pollutant: PM2.5 · Observed Nov 10, 22:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 165 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 4 station cities within 165 km, e.g. Mudanjiang and Mudanjiang
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
98.2
PM10
44.8
NO₂
31.5
O₃
22.0
SO₂
34.1
CO
1126.0
- 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 Hengshan's daily AQI at 68 on average, from 53 on Nov 7 to an hourly peak of 139 on Nov 10.
Where Hengshan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hengshan: Healthy tree cover
40.6% tree cover against a 40% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
127,421
Target trees
127,421
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Hengshan lost?
Since 2001, the area within 10 km of Hengshan has lost about 1,340 hectares of forest (about 1,900 football pitches): 16% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 348 hectares (26%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from September 2017 of a 5 × 5 km area about 5 km southwest of the city center.
- Forest lost since 2001
- 1,340 haabout 1,900 football pitches
- Share of its forest
- 16%of what there was in 2000
- Cleared for good
- 348 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 67 hectares a year in 2021–2025, down from 97 hectares a year in 2016–2020. The worst year was 2016, when about 147 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 | 3 ha | 7 ha | 10 ha |
| 2002 | 2 ha | 4 ha | 5 ha |
| 2003 | 3 ha | 7 ha | 11 ha |
| 2004 | 2 ha | 11 ha | 13 ha |
| 2005 | 2 ha | 5 ha | 7 ha |
| 2006 | 14 ha | 35 ha | 49 ha |
| 2007 | 6 ha | 13 ha | 18 ha |
| 2008 | 3 ha | 41 ha | 44 ha |
| 2009 | 5 ha | 81 ha | 86 ha |
| 2010 | 6 ha | 20 ha | 26 ha |
| 2011 | 9 ha | 52 ha | 62 ha |
| 2012 | 11 ha | 39 ha | 50 ha |
| 2013 | 3 ha | 37 ha | 40 ha |
| 2014 | 10 ha | 41 ha | 51 ha |
| 2015 | 16 ha | 33 ha | 50 ha |
| 2016 | 67 ha | 80 ha | 147 ha |
| 2017 | 82 ha | 33 ha | 115 ha |
| 2018 | 22 ha | 36 ha | 58 ha |
| 2019 | 20 ha | 83 ha | 103 ha |
| 2020 | 3 ha | 61 ha | 63 ha |
| 2021 | 7 ha | 64 ha | 71 ha |
| 2022 | 32 ha | 53 ha | 86 ha |
| 2023 | 7 ha | 62 ha | 70 ha |
| 2024 | 5 ha | 31 ha | 36 ha |
| 2025 | 8 ha | 64 ha | 72 ha |
What is causing deforestation around Hengshan?
- Loggingcan grow back73% · 985 ha
- Mining and energycleared for good13% · 173 ha
- Farms, pasture and plantationscleared for good12% · 159 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
- 10,600 ha
- Forest in 2020
- 10,000 ha
- Overall change
- −590 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hengshan shrank from about 10,600 hectares to 10,000 hectares, a net loss of about 590 hectares (−5.6%). New forest grew on about 542 hectares, but 1,130 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 Hengshan
Same 2 km radius, same index — so they compare directly.
- Didao16.2 km
China
- Tree cover
- 16%
- Air quality
- 180
- Qitaihe62.7 km
China
- Tree cover
- 25%
- Air quality
- 194
- Suifenhe92.0 km
China
- Tree cover
- 26%
- Air quality
- 172
- Mudanjiang124.3 km
China
- Tree cover
- 13%
- Air quality
- 162
- Hailin138.6 km
China
- Tree cover
- 15%
- Air quality
- 162
- 156.7 km
- Tree cover
- 34%
- Air quality
- 169
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Frequently asked
Questions about Hengshan
What is the air quality (AQI) in Hengshan right now?
The latest reading for Hengshan shows an AQI of 177 (Unhealthy), observed Nov 10, 22:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 165 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 Hengshan today?
At AQI 177 (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 Hengshan been like this week?
Over the last 7 days, the CAMS air-quality model put Hengshan's daily AQI at 68 on average, from 53 on Nov 7 to an hourly peak of 139 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Hengshan lost since 2001?
Since 2001, the area within 10 km of Hengshan has lost about 1,340 hectares of forest (about 1,900 football pitches): 16% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 348 hectares (26%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 67 hectares a year in 2021–2025, down from 97 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Hengshan shrank from about 10,600 hectares to 10,000 hectares, a net loss of about 590 hectares (−5.6%). New forest grew on about 542 hectares, but 1,130 hectares were lost.
What is the tree count in Hengshan?
Hengshan has an estimated 127,421 trees across the 12.56 km² of land measured — 40.6% tree cover, already past the 40% tree-cover target set for this area.
How many more trees does Hengshan need?
Hengshan has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Hengshan'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 Hengshan District; the tree count is an estimate derived from that cover.
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