City report · Guangxi, China
Hepu Air quality today
Air quality in Hepu currently reads AQI 144 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
AQI 144
Air quality right now
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 53.0
- tree cover
- 27.1%
- trees in this area
- 84.3K
- more trees needed
- 24.6K
Measured across a 2 km radius around Hepu County, Beihai, Guangxi, China (12.57 km²), from a satellite image of Sep 11, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Hepu · AQI 144 (Unhealthy for sensitive groups)
Hepu's tree count comes to 84,286 trees across 12.44 km² of land, 8 points below the 35% tree-cover level considered healthy for this area, so roughly 24,570 more trees would close the gap.
Air quality detail
Air quality in Hepu today: AQI 144, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 12, 01:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Beihai Industrial Park, Beihai (北海北海工业园), 15.3 km away · median of 2 stations
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
53.0
PM10
63.1
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Guangxi Zhuang Autonomous Region Environmental Protection Agency (广西壮族自治区环境保护厅)
- Outdoor exercise
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise
- Windows
- Close them to keep the outside air out
- Mask
- Sensitive groups: an N95 outdoors
- Air purifier
- Run one, especially in bedrooms
Over the last 7 days, the CAMS air-quality model put Hepu's daily AQI at 47 on average, from 28 on Nov 11 to an hourly peak of 67 on Nov 9.
Where Hepu stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hepu: Below target
27.1% tree cover against a 35% healthy-neighborhood target, across 12.44 km² of land.
Trees in this area
84,286
Target trees
108,856
More trees needed
24,570
CO₂ if planted / yr
540.5 t
Deforestation · 2001–2025
How much forest has Hepu lost?
Since 2001, the area within 10 km of Hepu has lost about 343 hectares of forest (about 480 football pitches): 65% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 32 hectares (9.2%) 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
- 343 haabout 480 football pitches
- Share of its forest
- 65%of what there was in 2000
- Cleared for good
- 32 hadeforestation: turned into farms, mines or towns
The worst year was 2005, when about 55 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 | 7 ha | 8 ha |
| 2002 | under 1 ha | 48 ha | 49 ha |
| 2003 | 1 ha | 10 ha | 11 ha |
| 2004 | under 1 ha | 31 ha | 32 ha |
| 2005 | 6 ha | 49 ha | 55 ha |
| 2006 | 2 ha | 26 ha | 28 ha |
| 2007 | 2 ha | 23 ha | 25 ha |
| 2008 | 1 ha | 19 ha | 20 ha |
| 2009 | under 1 ha | 11 ha | 12 ha |
| 2010 | 3 ha | 11 ha | 14 ha |
| 2011 | 4 ha | 13 ha | 16 ha |
| 2012 | 3 ha | 18 ha | 21 ha |
| 2013 | under 1 ha | 2 ha | 2 ha |
| 2014 | under 1 ha | 7 ha | 7 ha |
| 2015 | under 1 ha | 4 ha | 4 ha |
| 2016 | under 1 ha | 3 ha | 3 ha |
| 2017 | under 1 ha | 6 ha | 7 ha |
| 2018 | under 1 ha | 4 ha | 5 ha |
| 2019 | 4 ha | 5 ha | 9 ha |
| 2020 | under 1 ha | under 1 ha | 1 ha |
| 2021 | under 1 ha | 4 ha | 4 ha |
| 2022 | under 1 ha | 2 ha | 2 ha |
| 2023 | under 1 ha | 5 ha | 6 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | 2 ha | 2 ha |
What is causing deforestation around Hepu?
- Loggingcan grow back89% · 307 ha
- Towns and roadscleared for good8.1% · 28 ha
- Farms, pasture and plantationscleared for good1.1% · 4 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
- 3,320 ha
- Forest in 2020
- 3,420 ha
- Overall change
- +107 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hepu grew from about 3,320 hectares to 3,420 hectares, a net gain of about 107 hectares (+3.2%). New forest grew on about 397 hectares, while 291 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 Hepu
What is the air quality (AQI) in Hepu right now?
The latest reading for Hepu shows an AQI of 144 (Unhealthy for sensitive groups), measured Nov 12, 01:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Beihai Industrial Park, Beihai (北海北海工业园), 15.3 km away). The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Hepu today?
At AQI 144 (Unhealthy for sensitive groups): children, older adults and people with asthma or heart disease should cut down long or hard exercise. Windows: close them to keep the outside air out. Masks: sensitive groups: an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Hepu been like this week?
Over the last 7 days, the CAMS air-quality model put Hepu's daily AQI at 47 on average, from 28 on Nov 11 to an hourly peak of 67 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 Hepu lost since 2001?
Since 2001, the area within 10 km of Hepu has lost about 343 hectares of forest (about 480 football pitches): 65% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 32 hectares (9.2%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Hepu grew from about 3,320 hectares to 3,420 hectares, a net gain of about 107 hectares (+3.2%). New forest grew on about 397 hectares, while 291 hectares were lost.
What is the tree count in Hepu?
Hepu has an estimated 84,286 trees across the 12.44 km² of land measured — 27.1% tree cover, 8 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Hepu need?
Hepu needs roughly 24,570 more trees to close a 8-point shortfall against its 35% tree-cover target — about 540.5 t of extra CO₂ absorbed per year once grown.
How are Hepu's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Hepu County, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 Hepu County; the tree count is an estimate derived from that cover.
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