City report · Quang Tri, Vietnam
Đồng Hới Air quality today
Air quality in Đồng Hới currently reads AQI 61 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 61
Moderate
- PM2.5, fine particles (µg/m³)
- 15.5
- tree cover
- 17.8%
- trees in this area
- 42.8K
- more trees needed
- 29.4K
Measured across a 2 km radius around Dong Hoi, Quang Tri, Vietnam (12.57 km²), from a satellite image of Aug 17, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Đồng Hới · AQI 61 (Moderate)
Đồng Hới's tree count comes to 42,835 trees across 9.63 km² of land, 12 points below the 30% tree-cover level considered healthy for this area, so roughly 29,359 more trees would close the gap.
Air quality detail
Air quality in Đồng Hới today: AQI 61, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 225 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 4 station cities within 225 km, e.g. Song Tri and Hue
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
15.5
PM10
23.9
NO₂
1.4
O₃
120.0
SO₂
2.1
CO
326.0
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Đồng Hới's daily AQI at 50 on average, from 41 on Nov 5 to an hourly peak of 76 on Nov 10.
Where Đồng Hới stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Đồng Hới: Critically low
17.8% tree cover against a 30% healthy-neighborhood target, across 9.63 km² of land.
Trees in this area
42,835
Target trees
72,194
More trees needed
29,359
CO₂ if planted / yr
645.9 t
Deforestation · 2001–2025
How much forest has Đồng Hới lost?
Since 2001, the area within 10 km of Đồng Hới has lost about 3,120 hectares of forest (about 4,400 football pitches): 82% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 696 hectares (22%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from April 2017 of a 5 × 5 km area about 7 km southwest of the city center.
- Forest lost since 2001
- 3,120 haabout 4,400 football pitches
- Share of its forest
- 82%of what there was in 2000
- Cleared for good
- 696 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 85 hectares a year in 2021–2025, down from 191 hectares a year in 2016–2020. The worst year was 2014, when about 734 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 | 3 ha | 4 ha |
| 2002 | 7 ha | 9 ha | 15 ha |
| 2003 | 15 ha | 22 ha | 37 ha |
| 2004 | 4 ha | 4 ha | 8 ha |
| 2005 | 7 ha | 50 ha | 57 ha |
| 2006 | 5 ha | 10 ha | 15 ha |
| 2007 | under 1 ha | 10 ha | 10 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | 177 ha | 47 ha | 224 ha |
| 2010 | 41 ha | 17 ha | 58 ha |
| 2011 | 5 ha | 21 ha | 25 ha |
| 2012 | 28 ha | 108 ha | 136 ha |
| 2013 | 79 ha | 205 ha | 284 ha |
| 2014 | 135 ha | 599 ha | 734 ha |
| 2015 | 16 ha | 116 ha | 131 ha |
| 2016 | 14 ha | 158 ha | 172 ha |
| 2017 | 8 ha | 114 ha | 121 ha |
| 2018 | 23 ha | 208 ha | 231 ha |
| 2019 | 34 ha | 203 ha | 237 ha |
| 2020 | 22 ha | 171 ha | 193 ha |
| 2021 | 7 ha | 138 ha | 145 ha |
| 2022 | 23 ha | 74 ha | 97 ha |
| 2023 | 31 ha | 82 ha | 113 ha |
| 2024 | 8 ha | 27 ha | 35 ha |
| 2025 | 7 ha | 27 ha | 35 ha |
What is causing deforestation around Đồng Hới?
- Loggingcan grow back78% · 2,420 ha
- Farms, pasture and plantationscleared for good19% · 591 ha
- Towns and roadscleared for good3.4% · 105 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
- 5,920 ha
- Forest in 2020
- 4,160 ha
- Overall change
- −1,770 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Đồng Hới shrank from about 5,920 hectares to 4,160 hectares, a net loss of about 1,770 hectares (−30%). New forest grew on about 164 hectares, but 1,930 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 Đồng Hới
What is the air quality (AQI) in Đồng Hới right now?
The latest reading for Đồng Hới shows an AQI of 61 (Moderate), observed Nov 11, 17:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 225 km, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Đồng Hới today?
At AQI 61 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Đồng Hới been like this week?
Over the last 7 days, the CAMS air-quality model put Đồng Hới's daily AQI at 50 on average, from 41 on Nov 5 to an hourly peak of 76 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Đồng Hới lost since 2001?
Since 2001, the area within 10 km of Đồng Hới has lost about 3,120 hectares of forest (about 4,400 football pitches): 82% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 696 hectares (22%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 85 hectares a year in 2021–2025, down from 191 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Đồng Hới shrank from about 5,920 hectares to 4,160 hectares, a net loss of about 1,770 hectares (−30%). New forest grew on about 164 hectares, but 1,930 hectares were lost.
What is the tree count in Đồng Hới?
Đồng Hới has an estimated 42,835 trees across the 9.63 km² of land measured — 17.8% tree cover, 12 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Đồng Hới need?
Đồng Hới needs roughly 29,359 more trees to close a 12-point shortfall against its 30% tree-cover target — about 645.9 t of extra CO₂ absorbed per year once grown.
How are Đồng Hới'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 Dong Hoi; the tree count is an estimate derived from that cover.
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