City report · Quảng Ninh, Vietnam
Thị Trấn Đông Triều Air quality today
Air quality in Thị Trấn Đông Triều currently reads AQI 42 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 42
Good
- PM2.5, fine particles (µg/m³)
- 9.3
- tree cover
- 32.3%
- trees in this area
- 101K
- more trees needed
- 0
Measured across a 2 km radius around Thủy An, Đức Chính, Chí Linh, Quảng Ninh, Vietnam (12.57 km²), from a satellite image of Sep 21, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Thị Trấn Đông Triều · AQI 42 (Good)
Thị Trấn Đông Triều's tree count comes to 100,966 trees across 12.51 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Thị Trấn Đông Triều today: AQI 42, Good
Main pollutant: PM2.5 · Observed Nov 10, 20:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 65 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 5 station cities within 65 km, e.g. Hong Bang and Thuan Thanh
Health signal
Air quality is satisfactory for everyone.
PM2.5
9.3
PM10
17.2
NO₂
21.1
O₃
46.0
SO₂
19.2
CO
365.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Thị Trấn Đông Triều's daily AQI at 57 on average, from 34 on Nov 10 to an hourly peak of 122 on Nov 4.
Where Thị Trấn Đông Triều stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Thị Trấn Đông Triều: Healthy tree cover
32.3% tree cover against a 30% healthy-neighborhood target, across 12.51 km² of land.
Trees in this area
100,966
Target trees
100,966
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Thị Trấn Đông Triều lost?
Since 2001, the area within 10 km of Thị Trấn Đông Triều has lost about 1,560 hectares of forest (about 2,200 football pitches): 59% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 114 hectares (7.3%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from December 2017 of a 5 × 5 km area about 7 km north of the city center.
- Forest lost since 2001
- 1,560 haabout 2,200 football pitches
- Share of its forest
- 59%of what there was in 2000
- Cleared for good
- 114 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 104 hectares a year in 2021–2025, against 134 hectares a year in 2016–2020. The worst year was 2018, when about 176 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 | 10 ha | 29 ha | 39 ha |
| 2002 | 2 ha | 3 ha | 5 ha |
| 2003 | under 1 ha | 4 ha | 5 ha |
| 2004 | 3 ha | 18 ha | 21 ha |
| 2005 | 3 ha | 20 ha | 23 ha |
| 2006 | under 1 ha | 24 ha | 24 ha |
| 2007 | 6 ha | 27 ha | 33 ha |
| 2008 | under 1 ha | 10 ha | 10 ha |
| 2009 | 11 ha | 19 ha | 30 ha |
| 2010 | 3 ha | 18 ha | 21 ha |
| 2011 | 2 ha | 9 ha | 11 ha |
| 2012 | under 1 ha | 19 ha | 20 ha |
| 2013 | under 1 ha | 17 ha | 17 ha |
| 2014 | 1 ha | 55 ha | 56 ha |
| 2015 | 5 ha | 52 ha | 57 ha |
| 2016 | 2 ha | 157 ha | 159 ha |
| 2017 | 2 ha | 117 ha | 119 ha |
| 2018 | 5 ha | 171 ha | 176 ha |
| 2019 | 11 ha | 119 ha | 130 ha |
| 2020 | 5 ha | 79 ha | 84 ha |
| 2021 | 4 ha | 58 ha | 62 ha |
| 2022 | 4 ha | 83 ha | 87 ha |
| 2023 | 11 ha | 75 ha | 86 ha |
| 2024 | 14 ha | 154 ha | 168 ha |
| 2025 | 9 ha | 109 ha | 118 ha |
What is causing deforestation around Thị Trấn Đông Triều?
- Loggingcan grow back91% · 1,420 ha
- Mining and energycleared for good4.6% · 71 ha
- Farms, pasture and plantationscleared for good2.1% · 33 ha
Also: wildfires, towns and roads, shifting farming, 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
- 6,700 ha
- Forest in 2020
- 7,450 ha
- Overall change
- +743 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Thị Trấn Đông Triều grew from about 6,700 hectares to 7,450 hectares, a net gain of about 743 hectares (+11%). New forest grew on about 1,240 hectares, while 499 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 Thị Trấn Đông Triều
What is the air quality (AQI) in Thị Trấn Đông Triều right now?
The latest reading for Thị Trấn Đông Triều shows an AQI of 42 (Good), observed Nov 10, 20:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 65 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Thị Trấn Đông Triều today?
At AQI 42 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Thị Trấn Đông Triều been like this week?
Over the last 7 days, the CAMS air-quality model put Thị Trấn Đông Triều's daily AQI at 57 on average, from 34 on Nov 10 to an hourly peak of 122 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 Thị Trấn Đông Triều lost since 2001?
Since 2001, the area within 10 km of Thị Trấn Đông Triều has lost about 1,560 hectares of forest (about 2,200 football pitches): 59% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 114 hectares (7.3%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss has stayed about the same: about 104 hectares a year in 2021–2025, against 134 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Thị Trấn Đông Triều grew from about 6,700 hectares to 7,450 hectares, a net gain of about 743 hectares (+11%). New forest grew on about 1,240 hectares, while 499 hectares were lost.
What is the tree count in Thị Trấn Đông Triều?
Thị Trấn Đông Triều has an estimated 100,966 trees across the 12.51 km² of land measured — 32.3% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Thị Trấn Đông Triều need?
Thị Trấn Đông Triều has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Thị Trấn Đông Triều'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 Thủy An; the tree count is an estimate derived from that cover.
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