City report · Thanh Hóa Province, Vietnam
Thanh Hóa Air quality today
Air quality in Thanh Hóa currently reads AQI 38 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 38
Good
- PM2.5, fine particles (µg/m³)
- 7.1
- tree cover
- 20.5%
- trees in this area
- 64.1K
- more trees needed
- 29.7K
Measured across a 2 km radius around Hac Thanh, Thanh Hoa, Vietnam (12.57 km²), from a satellite image of Jun 1, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Thanh Hóa · AQI 38 (Good)
Thanh Hóa's tree count comes to 64,081 trees across 12.51 km² of land, 10 points below the 30% tree-cover level considered healthy for this area, so roughly 29,696 more trees would close the gap.
Air quality detail
Air quality in Thanh Hóa today: AQI 38, Good
Main pollutant: PM2.5 · Observed Nov 11, 05:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 145 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 5 station cities within 145 km, e.g. Duong Hao and Van Mieu - Quoc Tu Giam
Health signal
Air quality is satisfactory for everyone.
PM2.5
7.1
PM10
13.6
NO₂
15.6
O₃
27.0
SO₂
11.0
CO
454.0
- 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 Thanh Hóa's daily AQI at 56 on average, from 46 on Nov 10 to an hourly peak of 90 on Nov 5.
Where Thanh Hóa stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Thanh Hóa: Below target
20.5% tree cover against a 30% healthy-neighborhood target, across 12.51 km² of land.
Trees in this area
64,081
Target trees
93,777
More trees needed
29,696
CO₂ if planted / yr
653.3 t
Deforestation · 2001–2025
How much forest has Thanh Hóa lost?
Since 2001, the area within 10 km of Thanh Hóa has lost about 17 hectares of forest (about 24 football pitches): 9.6% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 2 hectares (13%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from December 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 17 haabout 24 football pitches
- Share of its forest
- 9.6%of what there was in 2000
- Cleared for good
- 2 hadeforestation: turned into farms, mines or towns
The worst year was 2009, when about 3 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 | under 1 ha | under 1 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | 2 ha | 2 ha |
| 2005 | under 1 ha | 2 ha | 2 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | 3 ha | 3 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | 2 ha | 2 ha |
| 2012 | under 1 ha | 1 ha | 2 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 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 | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | 1 ha | 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 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 Thanh Hóa?
- Loggingcan grow back79% · 14 ha
- Towns and roadscleared for good8.7% · 2 ha
- Mining and energycleared for good4.1% · under 1 ha
Also: 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
- 863 ha
- Forest in 2020
- 1,380 ha
- Overall change
- +521 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Thanh Hóa grew from about 863 hectares to 1,380 hectares, a net gain of about 521 hectares (+60%). New forest grew on about 536 hectares, while 15 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 Thanh Hóa
What is the air quality (AQI) in Thanh Hóa right now?
The latest reading for Thanh Hóa shows an AQI of 38 (Good), observed Nov 11, 05:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 145 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Thanh Hóa today?
At AQI 38 (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 Thanh Hóa been like this week?
Over the last 7 days, the CAMS air-quality model put Thanh Hóa's daily AQI at 56 on average, from 46 on Nov 10 to an hourly peak of 90 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Thanh Hóa lost since 2001?
Since 2001, the area within 10 km of Thanh Hóa has lost about 17 hectares of forest (about 24 football pitches): 9.6% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 2 hectares (13%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Thanh Hóa grew from about 863 hectares to 1,380 hectares, a net gain of about 521 hectares (+60%). New forest grew on about 536 hectares, while 15 hectares were lost.
What is the tree count in Thanh Hóa?
Thanh Hóa has an estimated 64,081 trees across the 12.51 km² of land measured — 20.5% tree cover, 10 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Thanh Hóa need?
Thanh Hóa needs roughly 29,696 more trees to close a 10-point shortfall against its 30% tree-cover target — about 653.3 t of extra CO₂ absorbed per year once grown.
How are Thanh Hóa'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 Hac Thanh; the tree count is an estimate derived from that cover.
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