City report · Guangxi, China
Beihai Air quality today
Air quality in Beihai currently reads AQI 122 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Air quality right now
AQI 122
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 44.0
- tree cover
- 24.4%
- trees in this area
- 54.0K
- more trees needed
- 23.5K
Measured across a 2 km radius around Haicheng District, 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.
Beihai · AQI 122 (Unhealthy for sensitive groups)
Beihai's tree count comes to 54,042 trees across 8.86 km² of land, 11 points below the 35% tree-cover level considered healthy for this area, so roughly 23,477 more trees would close the gap.
Air quality detail
Air quality in Beihai today: AQI 122, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 23:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Beihai (北海), 500 m away · median of 3 stations
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
44.0
PM10
54.0
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 Beihai's daily AQI at 51 on average, from 42 on Nov 9 to an hourly peak of 67 on Nov 9.
Where Beihai stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Beihai: Below target
24.4% tree cover against a 35% healthy-neighborhood target, across 8.86 km² of land.
Trees in this area
54,042
Target trees
77,519
More trees needed
23,477
CO₂ if planted / yr
516.5 t
Deforestation · 2001–2025
How much forest has Beihai lost?
Since 2001, the area within 10 km of Beihai has lost about 34 hectares of forest (about 47 football pitches): 16% of the forest it had in 2000. Most of it (72%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from December 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 34 haabout 47 football pitches
- Share of its forest
- 16%of what there was in 2000
- Cleared for good
- 24 hadeforestation: turned into farms, mines or towns
The worst year was 2010, when about 10 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 | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 2 ha | under 1 ha | 3 ha |
| 2007 | 1 ha | 1 ha | 3 ha |
| 2008 | under 1 ha | under 1 ha | 2 ha |
| 2009 | under 1 ha | under 1 ha | 1 ha |
| 2010 | 9 ha | 2 ha | 10 ha |
| 2011 | 3 ha | 3 ha | 5 ha |
| 2012 | 2 ha | under 1 ha | 3 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | 2 ha | under 1 ha | 2 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 | 3 ha | under 1 ha | 3 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 Beihai?
- Towns and roadscleared for good71% · 24 ha
- Storms, floods and other natural causescan grow back12% · 4 ha
- Unknown causescause unknown16% · 5 ha
Also: farms, pasture and plantations, logging.
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
- 714 ha
- Forest in 2020
- 828 ha
- Overall change
- +114 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Beihai grew from about 714 hectares to 828 hectares, a net gain of about 114 hectares (+16%). New forest grew on about 179 hectares, while 64 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 Beihai
What is the air quality (AQI) in Beihai right now?
The latest reading for Beihai shows an AQI of 122 (Unhealthy for sensitive groups), measured Nov 11, 23:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Beihai (北海), 500 m away). The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Beihai today?
At AQI 122 (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 Beihai been like this week?
Over the last 7 days, the CAMS air-quality model put Beihai's daily AQI at 51 on average, from 42 on Nov 9 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 Beihai lost since 2001?
Since 2001, the area within 10 km of Beihai has lost about 34 hectares of forest (about 47 football pitches): 16% of the forest it had in 2000. Most of it (72%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Beihai grew from about 714 hectares to 828 hectares, a net gain of about 114 hectares (+16%). New forest grew on about 179 hectares, while 64 hectares were lost.
What is the tree count in Beihai?
Beihai has an estimated 54,042 trees across the 8.86 km² of land measured — 24.4% tree cover, 11 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Beihai need?
Beihai needs roughly 23,477 more trees to close a 11-point shortfall against its 35% tree-cover target — about 516.5 t of extra CO₂ absorbed per year once grown.
How are Beihai's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Haicheng District, 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 Haicheng District; the tree count is an estimate derived from that cover.
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