City report · Hai Phong, Vietnam
Kiến An Air quality today
Air quality in Kiến An currently reads AQI 39 (Good): Air quality is satisfactory for everyone.
AQI 39
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 8.3
- tree cover
- 40.5%
- trees in this area
- 123K
- more trees needed
- 0
Measured across a 2 km radius around Kien An, Hai Phong, Vietnam (12.57 km²), from a satellite image of Sep 21, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Kiến An · AQI 39 (Good)
Kiến An's tree count comes to 122,909 trees across 12.14 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Kiến An today: AQI 39, Good
Main pollutant: PM2.5 · Observed Nov 10, 20:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 85 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 85 km, e.g. Duong Hao and Gia Lâm
Health signal
Air quality is satisfactory for everyone.
PM2.5
8.3
PM10
16.6
NO₂
28.4
O₃
35.0
SO₂
29.3
CO
487.0
- 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 Kiến An's daily AQI at 49 on average, from 43 on Nov 9 to an hourly peak of 98 on Nov 4.
Where Kiến An stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Kiến An: Healthy tree cover
40.5% tree cover against a 30% healthy-neighborhood target, across 12.14 km² of land.
Trees in this area
122,909
Target trees
122,909
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Kiến An lost?
Since 2001, the area within 10 km of Kiến An has lost about 74 hectares of forest (about 100 football pitches): 22% of the forest it had in 2000. The biggest cause was logging (47%), after which forest can grow back. About 23 hectares (32%) 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
- 74 haabout 100 football pitches
- Share of its forest
- 22%of what there was in 2000
- Cleared for good
- 23 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 21 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 | 12 ha | 21 ha |
| 2002 | under 1 ha | 1 ha | 2 ha |
| 2003 | 2 ha | 3 ha | 5 ha |
| 2004 | 1 ha | 2 ha | 3 ha |
| 2005 | 2 ha | 1 ha | 3 ha |
| 2006 | under 1 ha | under 1 ha | 1 ha |
| 2007 | under 1 ha | 2 ha | 2 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | 2 ha | 2 ha | 4 ha |
| 2010 | under 1 ha | 1 ha | 1 ha |
| 2011 | 1 ha | under 1 ha | 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 | 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 | 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 | 2 ha | 19 ha | 21 ha |
| 2025 | under 1 ha | 2 ha | 2 ha |
What is causing deforestation around Kiến An?
- Loggingcan grow back47% · 35 ha
- Towns and roadscleared for good30% · 22 ha
- Farms, pasture and plantationscleared for good2.2% · 2 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
- 3,280 ha
- Forest in 2020
- 3,720 ha
- Overall change
- +443 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Kiến An grew from about 3,280 hectares to 3,720 hectares, a net gain of about 443 hectares (+14%). New forest grew on about 459 hectares, while 16 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 Kiến An
What is the air quality (AQI) in Kiến An right now?
The latest reading for Kiến An shows an AQI of 39 (Good), observed Nov 10, 20:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 85 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Kiến An today?
At AQI 39 (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 Kiến An been like this week?
Over the last 7 days, the CAMS air-quality model put Kiến An's daily AQI at 49 on average, from 43 on Nov 9 to an hourly peak of 98 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 Kiến An lost since 2001?
Since 2001, the area within 10 km of Kiến An has lost about 74 hectares of forest (about 100 football pitches): 22% of the forest it had in 2000. The biggest cause was logging (47%), after which forest can grow back. About 23 hectares (32%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Kiến An grew from about 3,280 hectares to 3,720 hectares, a net gain of about 443 hectares (+14%). New forest grew on about 459 hectares, while 16 hectares were lost.
What is the tree count in Kiến An?
Kiến An has an estimated 122,909 trees across the 12.14 km² of land measured — 40.5% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Kiến An need?
Kiến An has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Kiến An'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 Kien An; the tree count is an estimate derived from that cover.
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