City report · Hai Phong, Vietnam
Hải Dương Air quality today
Air quality in Hải Dương currently reads AQI 64 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 64
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 16.2
- tree cover
- 21.9%
- trees in this area
- 64.7K
- more trees needed
- 23.9K
Measured across a 2 km radius around Hai Duong, 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.
Hải Dương · AQI 64 (Moderate)
Hải Dương's tree count comes to 64,673 trees across 11.82 km² of land, 8 points below the 30% tree-cover level considered healthy for this area, so roughly 23,920 more trees would close the gap.
Air quality detail
Air quality in Hải Dương today: AQI 64, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 02:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 45 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 45 km, e.g. Duong Hao and Gia Lâm
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
16.2
PM10
32.7
NO₂
42.2
O₃
17.0
SO₂
29.8
CO
509.0
- 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 Hải Dương's daily AQI at 66 on average, from 47 on Nov 9 to an hourly peak of 94 on Nov 11.
Where Hải Dương stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hải Dương: Below target
21.9% tree cover against a 30% healthy-neighborhood target, across 11.82 km² of land.
Trees in this area
64,673
Target trees
88,593
More trees needed
23,920
CO₂ if planted / yr
526.2 t
Deforestation · 2001–2025
How much forest has Hải Dương lost?
Since 2001, the area within 10 km of Hải Dương has lost about 31 hectares of forest (about 43 football pitches): 9.8% of the forest it had in 2000. The biggest cause was towns and roads (34%). About 14 hectares (45%) 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
- 31 haabout 43 football pitches
- Share of its forest
- 9.8%of what there was in 2000
- Cleared for good
- 14 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 12 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 | 6 ha | 6 ha | 12 ha |
| 2002 | under 1 ha | 1 ha | 2 ha |
| 2003 | 4 ha | under 1 ha | 5 ha |
| 2004 | under 1 ha | 1 ha | 1 ha |
| 2005 | 2 ha | 1 ha | 3 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | 3 ha | 3 ha |
| 2010 | under 1 ha | 1 ha | 1 ha |
| 2011 | under 1 ha | 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 | 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 | 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 Hải Dương?
- Towns and roadscleared for good34% · 10 ha
- Farms, pasture and plantationscleared for good11% · 4 ha
- Unknown causescause unknown54% · 17 ha
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
- 1,690 ha
- Forest in 2020
- 2,270 ha
- Overall change
- +574 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hải Dương grew from about 1,690 hectares to 2,270 hectares, a net gain of about 574 hectares (+34%). New forest grew on about 580 hectares, while 6 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
In the same region
Measured cities near Hải Dương
Same 2 km radius, same index — so they compare directly.
- Chí Linh14.1 km
Vietnam
- Tree cover
- 30%
- Air quality
- 51
- Thị Trấn Đông Triều24.5 km
Vietnam
- Tree cover
- 32%
- Air quality
- 39
- Mỹ Hào26.1 km
Vietnam
- Tree cover
- 23%
- Air quality
- 156
- Thuận Thanh28.8 km
Vietnam
- Tree cover
- 20%
- Air quality
- 156
- Kiến An33.9 km
Vietnam
- Tree cover
- 41%
- Air quality
- 39
- Haiphong37.4 km
Vietnam
- Tree cover
- 19%
- Air quality
- 46
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Frequently asked
Questions about Hải Dương
What is the air quality (AQI) in Hải Dương right now?
The latest reading for Hải Dương shows an AQI of 64 (Moderate), observed Nov 11, 02:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 45 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 Hải Dương today?
At AQI 64 (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 Hải Dương been like this week?
Over the last 7 days, the CAMS air-quality model put Hải Dương's daily AQI at 66 on average, from 47 on Nov 9 to an hourly peak of 94 on Nov 11. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Hải Dương lost since 2001?
Since 2001, the area within 10 km of Hải Dương has lost about 31 hectares of forest (about 43 football pitches): 9.8% of the forest it had in 2000. The biggest cause was towns and roads (34%). About 14 hectares (45%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Hải Dương grew from about 1,690 hectares to 2,270 hectares, a net gain of about 574 hectares (+34%). New forest grew on about 580 hectares, while 6 hectares were lost.
What is the tree count in Hải Dương?
Hải Dương has an estimated 64,673 trees across the 11.82 km² of land measured — 21.9% tree cover, 8 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Hải Dương need?
Hải Dương needs roughly 23,920 more trees to close a 8-point shortfall against its 30% tree-cover target — about 526.2 t of extra CO₂ absorbed per year once grown.
How are Hải Dương'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 Hai Duong; the tree count is an estimate derived from that cover.
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