City report · Heilongjiang, China
Didao Air quality today
Air quality in Didao currently reads AQI 183 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
AQI 183
Air quality right now
Unhealthy
- PM2.5, fine particles (µg/m³)
- 87.9
- tree cover
- 15.7%
- trees in this area
- 49.3K
- more trees needed
- 76.3K
Measured across a 2 km radius around Didao District, 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.
Didao · AQI 183 (Unhealthy)
Didao's tree count comes to 49,274 trees across 12.56 km² of land, 24 points below the 40% tree-cover level considered healthy for this area, so roughly 76,264 more trees would close the gap.
Air quality detail
Air quality in Didao today: AQI 183, Unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 12:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 145 km, e.g. Shuangyashan and Mudanjiang
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
87.9
PM10
48.9
NO₂
8.3
O₃
55.0
SO₂
9.5
CO
391.0
- 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 Didao's daily AQI at 81 on average, from 53 on Nov 7 to an hourly peak of 159 on Nov 11.
Where Didao stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Didao: Critically low
15.7% tree cover against a 40% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
49,274
Target trees
125,538
More trees needed
76,264
CO₂ if planted / yr
1,678 t
Deforestation · 2001–2025
How much forest has Didao lost?
Since 2001, the area within 10 km of Didao has lost about 606 hectares of forest (about 850 football pitches): 12% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 125 hectares (21%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from September 2017 of a 5 × 5 km area about 7 km northwest of the city center.
- Forest lost since 2001
- 606 haabout 850 football pitches
- Share of its forest
- 12%of what there was in 2000
- Cleared for good
- 125 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 34 hectares a year in 2021–2025, down from 53 hectares a year in 2016–2020. The worst year was 2019, when about 65 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 | 2 ha | 4 ha |
| 2002 | 1 ha | 2 ha | 3 ha |
| 2003 | 1 ha | 1 ha | 3 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | 1 ha | 1 ha | 3 ha |
| 2006 | 1 ha | 15 ha | 16 ha |
| 2007 | under 1 ha | 2 ha | 3 ha |
| 2008 | under 1 ha | 13 ha | 13 ha |
| 2009 | 7 ha | 41 ha | 48 ha |
| 2010 | 2 ha | 1 ha | 3 ha |
| 2011 | 10 ha | 9 ha | 19 ha |
| 2012 | 1 ha | 1 ha | 2 ha |
| 2013 | 4 ha | 10 ha | 14 ha |
| 2014 | 2 ha | 14 ha | 16 ha |
| 2015 | 10 ha | 11 ha | 21 ha |
| 2016 | 9 ha | 54 ha | 63 ha |
| 2017 | 14 ha | 15 ha | 29 ha |
| 2018 | 19 ha | 32 ha | 50 ha |
| 2019 | 4 ha | 61 ha | 65 ha |
| 2020 | 5 ha | 52 ha | 58 ha |
| 2021 | 12 ha | 47 ha | 59 ha |
| 2022 | under 1 ha | 23 ha | 23 ha |
| 2023 | 6 ha | 46 ha | 52 ha |
| 2024 | under 1 ha | 10 ha | 10 ha |
| 2025 | 11 ha | 17 ha | 27 ha |
What is causing deforestation around Didao?
- Loggingcan grow back77% · 468 ha
- Mining and energycleared for good13% · 78 ha
- Farms, pasture and plantationscleared for good3.9% · 24 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
- 8,640 ha
- Forest in 2020
- 8,690 ha
- Overall change
- +46 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Didao stayed about the same size, at about 8,690 hectares: new forest grew on about 654 hectares, and about 609 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 Didao
Same 2 km radius, same index — so they compare directly.
- Hengshan16.2 km
China
- Tree cover
- 41%
- Air quality
- 171
- Qitaihe48.4 km
China
- Tree cover
- 25%
- Air quality
- 168
- Suifenhe108.2 km
China
- Tree cover
- 26%
- Air quality
- 174
- Mudanjiang130.3 km
China
- Tree cover
- 13%
- Air quality
- 163
- 143.1 km
- Tree cover
- 34%
- Air quality
- 166
- Hailin143.1 km
China
- Tree cover
- 15%
- Air quality
- 163
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Frequently asked
Questions about Didao
What is the air quality (AQI) in Didao right now?
The latest reading for Didao shows an AQI of 183 (Unhealthy), observed Nov 11, 12:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 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 Didao today?
At AQI 183 (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 Didao been like this week?
Over the last 7 days, the CAMS air-quality model put Didao's daily AQI at 81 on average, from 53 on Nov 7 to an hourly peak of 159 on Nov 11. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Didao lost since 2001?
Since 2001, the area within 10 km of Didao has lost about 606 hectares of forest (about 850 football pitches): 12% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 125 hectares (21%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 34 hectares a year in 2021–2025, down from 53 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Didao stayed about the same size, at about 8,690 hectares: new forest grew on about 654 hectares, and about 609 hectares were lost.
What is the tree count in Didao?
Didao has an estimated 49,274 trees across the 12.56 km² of land measured — 15.7% tree cover, 24 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Didao need?
Didao needs roughly 76,264 more trees to close a 24-point shortfall against its 40% tree-cover target — about 1,678 t of extra CO₂ absorbed per year once grown.
How are Didao'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 Didao District; the tree count is an estimate derived from that cover.
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