City report · Shaanxi, China
Wayaobu Air quality today
Air quality in Wayaobu currently reads AQI 55 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 55
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 11.3
- tree cover
- 21.2%
- trees in this area
- 66.6K
- more trees needed
- 27.6K
Measured across a 2 km radius around Zichang, Yan'An, Shaanxi, China (12.57 km²), from a satellite image of Sep 14, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Wayaobu · AQI 55 (Moderate)
Wayaobu's tree count comes to 66,602 trees across 12.57 km², 9 points below the 30% tree-cover level considered healthy for this area, so roughly 27,646 more trees would close the gap.
Air quality detail
Air quality in Wayaobu today: AQI 55, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 00:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 245 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 5 station cities within 245 km, e.g. Yan'An and Lüliang
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
11.3
PM10
11.4
NO₂
13.9
O₃
49.0
SO₂
5.0
CO
188.0
- 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 Wayaobu's daily AQI at 48 on average, from 30 on Nov 9 to an hourly peak of 86 on Nov 7.
Where Wayaobu stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Wayaobu: Below target
21.2% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
66,602
Target trees
94,248
More trees needed
27,646
CO₂ if planted / yr
608.2 t
Deforestation · 2001–2025
How much forest has Wayaobu lost?
There was very little forest around Wayaobu in 2000, about 21 hectares, and about 5 hectares of it has been lost since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
The worst year was 2002, when about 2 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 | 1 ha | 1 ha | 2 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 | 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 | 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 Wayaobu?
- Mining and energycleared for good31% · 2 ha
- Towns and roadscleared for good19% · 1 ha
- Farms, pasture and plantationscleared 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
- 115 ha
- Forest in 2020
- 220 ha
- Overall change
- +105 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Wayaobu grew from about 115 hectares to 220 hectares, a net gain of about 105 hectares (+91%). New forest grew on about 127 hectares, while 22 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 Wayaobu
What is the air quality (AQI) in Wayaobu right now?
The latest reading for Wayaobu shows an AQI of 55 (Moderate), observed Nov 11, 00:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 245 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 Wayaobu today?
At AQI 55 (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 Wayaobu been like this week?
Over the last 7 days, the CAMS air-quality model put Wayaobu's daily AQI at 48 on average, from 30 on Nov 9 to an hourly peak of 86 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Wayaobu lost since 2001?
There was very little forest around Wayaobu in 2000, about 21 hectares, and about 5 hectares of it has been lost since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here. Comparing satellite maps from 2000 and 2020, the forest around Wayaobu grew from about 115 hectares to 220 hectares, a net gain of about 105 hectares (+91%). New forest grew on about 127 hectares, while 22 hectares were lost.
What is the tree count in Wayaobu?
Wayaobu has an estimated 66,602 trees across the 12.57 km² measured — 21.2% tree cover, 9 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Wayaobu need?
Wayaobu needs roughly 27,646 more trees to close a 9-point shortfall against its 30% tree-cover target — about 608.2 t of extra CO₂ absorbed per year once grown.
How are Wayaobu'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 Zichang; the tree count is an estimate derived from that cover.
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