City report · Heilongjiang, China
Mudanjiang Air quality today
Air quality in Mudanjiang currently reads AQI 162 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 162
Unhealthy
- PM2.5, fine particles (µg/m³)
- 71.0
- tree cover
- 12.5%
- trees in this area
- 34.4K
- more trees needed
- 75.6K
Measured across a 2 km radius around Dongan, Mudanjiang, Heilongjiang, China (12.57 km²), from a satellite image of Sep 18, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Mudanjiang · AQI 162 (Unhealthy)
Mudanjiang's tree count comes to 34,361 trees across 11 km² of land, 28 points below the 40% tree-cover level considered healthy for this area, so roughly 75,595 more trees would close the gap.
Air quality detail
Air quality in Mudanjiang today: AQI 162, Unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 22:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Mudanjiang (牡丹江), 700 m away · median of 3 stations
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
71.0
PM10
103.5
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Helongjiang Environmental Protection Agency (黑龙江省空气质量实时发布平台)
- 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 Mudanjiang's daily AQI at 72 on average, from 59 on Nov 7 to an hourly peak of 111 on Nov 4.
Where Mudanjiang stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Mudanjiang: Critically low
12.5% tree cover against a 40% healthy-neighborhood target, across 11 km² of land.
Trees in this area
34,361
Target trees
109,956
More trees needed
75,595
CO₂ if planted / yr
1,663 t
Deforestation · 2001–2025
How much forest has Mudanjiang lost?
Since 2001, the area within 10 km of Mudanjiang has lost about 113 hectares of forest (about 160 football pitches): 3.6% of the forest it had in 2000. The biggest cause was logging (43%), after which forest can grow back. About 37 hectares (33%) 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
- 113 haabout 160 football pitches
- Share of its forest
- 3.6%of what there was in 2000
- Cleared for good
- 37 hadeforestation: turned into farms, mines or towns
The worst year was 2019, when about 38 hectares of forest were lost, mostly to wildfires.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 4 ha | 2 ha | 6 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | 2 ha | under 1 ha | 2 ha |
| 2004 | 1 ha | 4 ha | 5 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 12 ha | 7 ha | 20 ha |
| 2007 | 1 ha | 1 ha | 2 ha |
| 2008 | under 1 ha | under 1 ha | 1 ha |
| 2009 | 2 ha | 2 ha | 4 ha |
| 2010 | under 1 ha | 2 ha | 3 ha |
| 2011 | 1 ha | 3 ha | 4 ha |
| 2012 | under 1 ha | 1 ha | 2 ha |
| 2013 | under 1 ha | under 1 ha | 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | 4 ha | 4 ha |
| 2016 | 2 ha | under 1 ha | 3 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | 2 ha | 9 ha | 11 ha |
| 2019 | 2 ha | 36 ha | 38 ha |
| 2020 | 1 ha | under 1 ha | 2 ha |
| 2021 | 1 ha | under 1 ha | 2 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 | 2 ha | under 1 ha | 3 ha |
What is causing deforestation around Mudanjiang?
- Loggingcan grow back43% · 48 ha
- Towns and roadscleared for good31% · 36 ha
- Wildfirescan grow back21% · 23 ha
Also: mining and energy, 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
- 4,440 ha
- Forest in 2020
- 5,110 ha
- Overall change
- +676 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Mudanjiang grew from about 4,440 hectares to 5,110 hectares, a net gain of about 676 hectares (+15%). New forest grew on about 783 hectares, while 107 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
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Frequently asked
Questions about Mudanjiang
What is the air quality (AQI) in Mudanjiang right now?
The latest reading for Mudanjiang shows an AQI of 162 (Unhealthy), measured Nov 11, 22:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Mudanjiang (牡丹江), 700 m away). The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Mudanjiang today?
At AQI 162 (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 Mudanjiang been like this week?
Over the last 7 days, the CAMS air-quality model put Mudanjiang's daily AQI at 72 on average, from 59 on Nov 7 to an hourly peak of 111 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Mudanjiang lost since 2001?
Since 2001, the area within 10 km of Mudanjiang has lost about 113 hectares of forest (about 160 football pitches): 3.6% of the forest it had in 2000. The biggest cause was logging (43%), after which forest can grow back. About 37 hectares (33%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Mudanjiang grew from about 4,440 hectares to 5,110 hectares, a net gain of about 676 hectares (+15%). New forest grew on about 783 hectares, while 107 hectares were lost.
What is the tree count in Mudanjiang?
Mudanjiang has an estimated 34,361 trees across the 11 km² of land measured — 12.5% tree cover, 28 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Mudanjiang need?
Mudanjiang needs roughly 75,595 more trees to close a 28-point shortfall against its 40% tree-cover target — about 1,663 t of extra CO₂ absorbed per year once grown.
How are Mudanjiang's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Dongan, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 Dongan; the tree count is an estimate derived from that cover.
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