City report · Heilongjiang, China
Heihe Air quality today
Air quality in Heihe currently reads AQI 99 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 99
Moderate
- PM2.5, fine particles (µg/m³)
- 39.7
- tree cover
- 18.7%
- trees in this area
- 49.7K
- more trees needed
- 30.0K
Measured across a 2 km radius around Aihui District, Heihe, 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.
Heihe · AQI 99 (Moderate)
Heihe's tree count comes to 49,701 trees across 10.63 km² of land, 11 points below the 30% tree-cover level considered healthy for this area, so roughly 30,033 more trees would close the gap.
Air quality detail
Air quality in Heihe today: AQI 99, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
39.7
PM10
44.4
NO₂
20.0
O₃
47.0
SO₂
6.8
CO
486.0
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Heihe's daily AQI at 56 on average, from 35 on Nov 7 to an hourly peak of 123 on Nov 11.
Where Heihe stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Heihe: Below target
18.7% tree cover against a 30% healthy-neighborhood target, across 10.63 km² of land.
Trees in this area
49,701
Target trees
79,734
More trees needed
30,033
CO₂ if planted / yr
660.7 t
Deforestation · 2001–2025
How much forest has Heihe lost?
Since 2001, the area within 10 km of Heihe has lost about 224 hectares of forest (about 310 football pitches): 7.6% of the forest it had in 2000. Most of it (66%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km north of the city center.
- Forest lost since 2001
- 224 haabout 310 football pitches
- Share of its forest
- 7.6%of what there was in 2000
- Cleared for good
- 147 hadeforestation: turned into farms, mines or towns
The worst year was 2024, when about 33 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 | 2 ha | under 1 ha | 3 ha |
| 2002 | under 1 ha | 5 ha | 6 ha |
| 2003 | under 1 ha | under 1 ha | 1 ha |
| 2004 | 16 ha | 14 ha | 29 ha |
| 2005 | 3 ha | under 1 ha | 3 ha |
| 2006 | 7 ha | 9 ha | 16 ha |
| 2007 | 2 ha | under 1 ha | 3 ha |
| 2008 | 17 ha | under 1 ha | 18 ha |
| 2009 | 14 ha | 3 ha | 16 ha |
| 2010 | 6 ha | under 1 ha | 7 ha |
| 2011 | 4 ha | under 1 ha | 4 ha |
| 2012 | under 1 ha | 2 ha | 3 ha |
| 2013 | 2 ha | under 1 ha | 2 ha |
| 2014 | 4 ha | under 1 ha | 5 ha |
| 2015 | 3 ha | under 1 ha | 3 ha |
| 2016 | 1 ha | under 1 ha | 2 ha |
| 2017 | 4 ha | 1 ha | 5 ha |
| 2018 | under 1 ha | 4 ha | 5 ha |
| 2019 | 7 ha | 12 ha | 19 ha |
| 2020 | 6 ha | 3 ha | 9 ha |
| 2021 | 4 ha | under 1 ha | 4 ha |
| 2022 | 19 ha | under 1 ha | 19 ha |
| 2023 | 7 ha | 1 ha | 8 ha |
| 2024 | 16 ha | 18 ha | 33 ha |
| 2025 | 2 ha | under 1 ha | 2 ha |
What is causing deforestation around Heihe?
- Towns and roadscleared for good49% · 110 ha
- Loggingcan grow back30% · 66 ha
- Mining and energycleared for good14% · 31 ha
Also: wildfires, farms, pasture and plantations, 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
- 3,440 ha
- Forest in 2020
- 3,280 ha
- Overall change
- −157 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Heihe shrank from about 3,440 hectares to 3,280 hectares, a net loss of about 157 hectares (−4.6%). New forest grew on about 25 hectares, but 183 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 Heihe
Same 2 km radius, same index — so they compare directly.
- Aihui29.4 km
China
- Tree cover
- 20%
- Air quality
- 118
- Bei’an229.2 km
China
- Tree cover
- 4%
- Air quality
- 339
- Jiagedaqi240.2 km
China
- Tree cover
- 20%
- Air quality
- 93
- Nehe272.9 km
China
- Tree cover
- 9%
- Air quality
- 649
- Yichun, Heilongjiang298.2 km
China
- Tree cover
- 41%
- Air quality
- 71
- Daxing’anling302.1 km
China
- Tree cover
- 36%
- Air quality
- 54
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Frequently asked
Questions about Heihe
What is the air quality (AQI) in Heihe right now?
The latest reading for Heihe shows an AQI of 99 (Moderate), observed Nov 11, 17:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Heihe today?
At AQI 99 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Heihe been like this week?
Over the last 7 days, the CAMS air-quality model put Heihe's daily AQI at 56 on average, from 35 on Nov 7 to an hourly peak of 123 on Nov 11. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Heihe lost since 2001?
Since 2001, the area within 10 km of Heihe has lost about 224 hectares of forest (about 310 football pitches): 7.6% of the forest it had in 2000. Most of it (66%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Heihe shrank from about 3,440 hectares to 3,280 hectares, a net loss of about 157 hectares (−4.6%). New forest grew on about 25 hectares, but 183 hectares were lost.
What is the tree count in Heihe?
Heihe has an estimated 49,701 trees across the 10.63 km² of land measured — 18.7% tree cover, 11 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Heihe need?
Heihe needs roughly 30,033 more trees to close a 11-point shortfall against its 30% tree-cover target — about 660.7 t of extra CO₂ absorbed per year once grown.
How are Heihe'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 Aihui District; the tree count is an estimate derived from that cover.
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