City report · Heilongjiang, China
Aihui Air quality today
Air quality in Aihui currently reads AQI 118 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Air quality right now
AQI 118
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 45.2
- tree cover
- 19.6%
- trees in this area
- 47.0K
- more trees needed
- 37.0K
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.
Aihui · AQI 118 (Unhealthy for sensitive groups)
Aihui's tree count comes to 47,043 trees across 9.6 km² of land, 15 points below the 35% tree-cover level considered healthy for this area, so roughly 36,963 more trees would close the gap.
Air quality detail
Air quality in Aihui today: AQI 118, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 19:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
45.2
PM10
53.2
NO₂
15.5
O₃
49.0
SO₂
4.6
CO
515.0
- 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 Aihui's daily AQI at 58 on average, from 43 on Nov 5 to an hourly peak of 125 on Nov 11.
Where Aihui stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Aihui: Critically low
19.6% tree cover against a 35% healthy-neighborhood target, across 9.6 km² of land.
Trees in this area
47,043
Target trees
84,006
More trees needed
36,963
CO₂ if planted / yr
813.2 t
Deforestation · 2001–2025
How much forest has Aihui lost?
Since 2001, the area within 10 km of Aihui has lost about 11 hectares of forest (about 15 football pitches): 1.9% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. Almost none of it was deforestation, meaning forest cleared for good.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 11 haabout 15 football pitches
- Share of its forest
- 1.9%of what there was in 2000
- Cleared for good
- under 1 hadeforestation: turned into farms, mines or towns
The worst year was 2024, when about 3 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 | under 1 ha | under 1 ha | under 1 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | 1 ha | 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | 1 ha | 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | 3 ha | 3 ha |
| 2025 | under 1 ha | 2 ha | 2 ha |
What is causing deforestation around Aihui?
- Loggingcan grow back60% · 7 ha
- Storms, floods and other natural causescan grow back13% · 1 ha
- Towns and roadscleared for good4.6% · under 1 ha
Also: 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
- 895 ha
- Forest in 2020
- 913 ha
- Overall change
- +18 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Aihui stayed about the same size, at about 913 hectares: new forest grew on about 20 hectares, and about 2 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 Aihui
Same 2 km radius, same index — so they compare directly.
- Heihe29.4 km
China
- Tree cover
- 19%
- Air quality
- 99
- Blagoveshchensk33.1 km
Russia
- Tree cover
- 24%
- Air quality
- 121
- Bei’an201.0 km
China
- Tree cover
- 4%
- Air quality
- 339
- Jiagedaqi244.3 km
China
- Tree cover
- 20%
- Air quality
- 93
- Nehe252.5 km
China
- Tree cover
- 9%
- Air quality
- 649
- Yichun, Heilongjiang271.0 km
China
- Tree cover
- 41%
- Air quality
- 71
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Frequently asked
Questions about Aihui
What is the air quality (AQI) in Aihui right now?
The latest reading for Aihui shows an AQI of 118 (Unhealthy for sensitive groups), observed Nov 11, 19:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Aihui today?
At AQI 118 (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 Aihui been like this week?
Over the last 7 days, the CAMS air-quality model put Aihui's daily AQI at 58 on average, from 43 on Nov 5 to an hourly peak of 125 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 Aihui lost since 2001?
Since 2001, the area within 10 km of Aihui has lost about 11 hectares of forest (about 15 football pitches): 1.9% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. Almost none of it was deforestation, meaning forest cleared for good. Comparing satellite maps from 2000 and 2020, the forest around Aihui stayed about the same size, at about 913 hectares: new forest grew on about 20 hectares, and about 2 hectares were lost.
What is the tree count in Aihui?
Aihui has an estimated 47,043 trees across the 9.6 km² of land measured — 19.6% tree cover, 15 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Aihui need?
Aihui needs roughly 36,963 more trees to close a 15-point shortfall against its 35% tree-cover target — about 813.2 t of extra CO₂ absorbed per year once grown.
How are Aihui'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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