City report · Heilongjiang, China
Lianhe Air quality today
Air quality in Lianhe currently reads AQI 104 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Air quality right now
AQI 104
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 32.1
- tree cover
- 33.1%
- trees in this area
- 102K
- more trees needed
- 5.9K
Measured across a 2 km radius around Nancha County, Yichun, Heilongjiang, China (12.57 km²), from a satellite image of Sep 21, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Lianhe · AQI 104 (Unhealthy for sensitive groups)
Lianhe's tree count comes to 102,323 trees across 12.37 km² of land, 2 points below the 35% tree-cover level considered healthy for this area, so roughly 5,874 more trees would close the gap.
Air quality detail
Air quality in Lianhe today: AQI 104, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 12:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 185 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 5 station cities within 185 km, e.g. Hegang and Jiamusi
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
32.1
PM10
24.0
NO₂
1.7
O₃
80.0
SO₂
3.3
CO
359.0
- 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 Lianhe's daily AQI at 61 on average, from 44 on Nov 7 to an hourly peak of 100 on Nov 11.
Where Lianhe stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Lianhe: Below target
33.1% tree cover against a 35% healthy-neighborhood target, across 12.37 km² of land.
Trees in this area
102,323
Target trees
108,197
More trees needed
5,874
CO₂ if planted / yr
129.2 t
Deforestation · 2001–2025
How much forest has Lianhe lost?
Since 2001, the area within 10 km of Lianhe has lost about 150 hectares of forest (about 210 football pitches): under 1% of the forest it had in 2000. The biggest cause was logging (47%), after which forest can grow back. About 58 hectares (39%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 150 haabout 210 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- 58 hadeforestation: turned into farms, mines or towns
The worst year was 2013, when about 35 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 | 2 ha | 2 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | 13 ha | 14 ha |
| 2004 | 2 ha | 15 ha | 17 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | 2 ha | 2 ha |
| 2007 | under 1 ha | 15 ha | 15 ha |
| 2008 | 2 ha | 6 ha | 7 ha |
| 2009 | under 1 ha | 8 ha | 8 ha |
| 2010 | under 1 ha | 12 ha | 13 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | 5 ha | 5 ha |
| 2013 | 30 ha | 4 ha | 35 ha |
| 2014 | 7 ha | 2 ha | 9 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 | 3 ha | 3 ha |
| 2019 | 9 ha | under 1 ha | 9 ha |
| 2020 | 4 ha | under 1 ha | 4 ha |
| 2021 | under 1 ha | 5 ha | 6 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 | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Lianhe?
- Loggingcan grow back47% · 71 ha
- Towns and roadscleared for good33% · 50 ha
- Mining and energycleared for good4.8% · 7 ha
Also: storms, floods and other natural causes, 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
- 22,400 ha
- Forest in 2020
- 22,300 ha
- Overall change
- −66 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Lianhe stayed about the same size, at about 22,300 hectares: new forest grew on about 17 hectares, and about 83 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 Lianhe
Same 2 km radius, same index — so they compare directly.
- Yichun, Heilongjiang72.0 km
China
- Tree cover
- 41%
- Air quality
- 71
- Hegang80.3 km
China
- Tree cover
- 21%
- Air quality
- 161
- Jiamusi87.1 km
China
- Tree cover
- 20%
- Air quality
- 182
- Tieli94.5 km
China
- Tree cover
- 9%
- Air quality
- 153
- Shuangyashan150.0 km
China
- Tree cover
- 22%
- Air quality
- 169
- 172.7 km
- Tree cover
- 34%
- Air quality
- 169
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Frequently asked
Questions about Lianhe
What is the air quality (AQI) in Lianhe right now?
The latest reading for Lianhe shows an AQI of 104 (Unhealthy for sensitive groups), observed Nov 11, 12:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 185 km, 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 Lianhe today?
At AQI 104 (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 Lianhe been like this week?
Over the last 7 days, the CAMS air-quality model put Lianhe's daily AQI at 61 on average, from 44 on Nov 7 to an hourly peak of 100 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 Lianhe lost since 2001?
Since 2001, the area within 10 km of Lianhe has lost about 150 hectares of forest (about 210 football pitches): under 1% of the forest it had in 2000. The biggest cause was logging (47%), after which forest can grow back. About 58 hectares (39%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Lianhe stayed about the same size, at about 22,300 hectares: new forest grew on about 17 hectares, and about 83 hectares were lost.
What is the tree count in Lianhe?
Lianhe has an estimated 102,323 trees across the 12.37 km² of land measured — 33.1% tree cover, 2 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Lianhe need?
Lianhe needs roughly 5,874 more trees to close a 2-point shortfall against its 35% tree-cover target — about 129.2 t of extra CO₂ absorbed per year once grown.
How are Lianhe'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 Nancha County; the tree count is an estimate derived from that cover.
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