City report · Thanh Hóa Province, Vietnam
Sầm Sơn Air quality today
Air quality in Sầm Sơn currently reads AQI 52 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 52
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 9.0
- tree cover
- 39.6%
- trees in this area
- 64.7K
- more trees needed
- 0
Measured across a 2 km radius around Sam Son, Thanh Hoa, Vietnam (12.57 km²), from a satellite image of Sep 9, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Sầm Sơn · AQI 52 (Moderate)
Sầm Sơn's tree count comes to 64,692 trees across 6.54 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Sầm Sơn today: AQI 52, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 12:00 local time via Open-Meteo / CAMS, corrected with 6 ground-station cities within 165 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 6 station cities within 165 km, e.g. Duong Hao and Gia Lâm
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
9.0
PM10
18.7
NO₂
12.9
O₃
96.0
SO₂
29.1
CO
282.0
- 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 Sầm Sơn's daily AQI at 53 on average, from 41 on Nov 5 to an hourly peak of 70 on Nov 9.
Where Sầm Sơn stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Sầm Sơn: Healthy tree cover
39.6% tree cover against a 30% healthy-neighborhood target, across 6.54 km² of land.
Trees in this area
64,692
Target trees
64,692
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Sầm Sơn lost?
Since 2001, the area within 10 km of Sầm Sơn has lost about 5 hectares of forest (about 6 football pitches): 4.5% of the forest it had in 2000. Most of it (51%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from December 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 5 haabout 6 football pitches
- Share of its forest
- 4.5%of what there was in 2000
- Cleared for good
- 2 hadeforestation: turned into farms, mines or towns
The worst year was 2017, when about 1 hectare 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 | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 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 | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 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 | 1 ha | under 1 ha | 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 | under 1 ha | under 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 Sầm Sơn?
- Farms, pasture and plantationscleared for good38% · 2 ha
- Storms, floods and other natural causescan grow back38% · 2 ha
- Towns and roadscleared for good13% · under 1 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
- 509 ha
- Forest in 2020
- 813 ha
- Overall change
- +304 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Sầm Sơn grew from about 509 hectares to 813 hectares, a net gain of about 304 hectares (+60%). New forest grew on about 304 hectares, while under 1 hectare was 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 Sầm Sơn
Same 2 km radius, same index — so they compare directly.
Build your own
Compare Sầm Sơn with anywhere
This place
Sầm Sơn
Use this data
Put Sầm Sơn's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Sầm Sơn
What is the air quality (AQI) in Sầm Sơn right now?
The latest reading for Sầm Sơn shows an AQI of 52 (Moderate), observed Nov 11, 12:00 local time via Open-Meteo / CAMS, corrected with 6 ground-station cities within 165 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 Sầm Sơn today?
At AQI 52 (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 Sầm Sơn been like this week?
Over the last 7 days, the CAMS air-quality model put Sầm Sơn's daily AQI at 53 on average, from 41 on Nov 5 to an hourly peak of 70 on Nov 9. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Sầm Sơn lost since 2001?
Since 2001, the area within 10 km of Sầm Sơn has lost about 5 hectares of forest (about 6 football pitches): 4.5% of the forest it had in 2000. Most of it (51%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Sầm Sơn grew from about 509 hectares to 813 hectares, a net gain of about 304 hectares (+60%). New forest grew on about 304 hectares, while under 1 hectare was lost.
What is the tree count in Sầm Sơn?
Sầm Sơn has an estimated 64,692 trees across the 6.54 km² of land measured — 39.6% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Sầm Sơn need?
Sầm Sơn has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Sầm Sơn'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 Sam Son; the tree count is an estimate derived from that cover.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same air-quality and tree-cover breakdown.
Check my address