City report · Shaanxi, China
Huayin Air quality today
Air quality in Huayin currently reads AQI 154 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 154
Unhealthy
- PM2.5, fine particles (µg/m³)
- 59.4
- tree cover
- 10.0%
- trees in this area
- 31.4K
- more trees needed
- 94.2K
Measured across a 2 km radius around Huayin, Weinan, Shaanxi, China (12.57 km²), from a satellite image of Sep 6, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Huayin · AQI 154 (Unhealthy)
Huayin's tree count comes to 31,385 trees across 12.56 km² of land, 30 points below the 40% tree-cover level considered healthy for this area, so roughly 94,154 more trees would close the gap.
Air quality detail
Air quality in Huayin today: AQI 154, Unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 22:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Huayin City Government, Weinan (渭南华阴市政府), 3 km away
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
59.4
PM10
63.1
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Shaanxi Provincial Environmental Protection Office (陕西省环保厅)
- Outdoor exercise
- Everyone should cut down long or hard exercise; sensitive groups should avoid it
- Windows
- Keep them closed
- Mask
- Wear an N95 outdoors
- Air purifier
- Run one
Over the last 7 days, the CAMS air-quality model put Huayin's daily AQI at 65 on average, from 40 on Nov 9 to an hourly peak of 109 on Nov 6.
Where Huayin stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Huayin: Critically low
10.0% tree cover against a 40% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
31,385
Target trees
125,539
More trees needed
94,154
CO₂ if planted / yr
2,071 t
Deforestation · 2001–2025
How much forest has Huayin lost?
Since 2001, the area within 10 km of Huayin has lost about 38 hectares of forest (about 54 football pitches): 1.3% of the forest it had in 2000. The biggest cause was storms, floods and other natural causes (49%), after which forest can grow back. Almost none of it was deforestation, meaning forest cleared for good.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 38 haabout 54 football pitches
- Share of its forest
- 1.3%of what there was in 2000
- Cleared for good
- under 1 hadeforestation: turned into farms, mines or towns
The worst year was 2006, when about 13 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 | 1 ha | 1 ha |
| 2003 | under 1 ha | 7 ha | 7 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 | 13 ha | 13 ha |
| 2007 | under 1 ha | 4 ha | 4 ha |
| 2008 | under 1 ha | 5 ha | 5 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | 2 ha | 2 ha |
| 2011 | under 1 ha | 2 ha | 2 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 | 1 ha | 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 Huayin?
- Storms, floods and other natural causescan grow back49% · 19 ha
- Loggingcan grow back40% · 15 ha
- Unknown causescause unknown11% · 4 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
- 6,200 ha
- Forest in 2020
- 6,390 ha
- Overall change
- +193 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Huayin grew from about 6,200 hectares to 6,390 hectares, a net gain of about 193 hectares (+3.1%). New forest grew on about 211 hectares, while 18 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 Huayin
What is the air quality (AQI) in Huayin right now?
The latest reading for Huayin shows an AQI of 154 (Unhealthy), measured Nov 11, 22:00 local time by the Huayin City Government, Weinan (渭南华阴市政府) ground monitoring station, 3 km away, via OpenAQ. The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Huayin today?
At AQI 154 (Unhealthy): everyone should cut down long or hard exercise; sensitive groups should avoid it. Windows: keep them closed. Masks: wear an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Huayin been like this week?
Over the last 7 days, the CAMS air-quality model put Huayin's daily AQI at 65 on average, from 40 on Nov 9 to an hourly peak of 109 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Huayin lost since 2001?
Since 2001, the area within 10 km of Huayin has lost about 38 hectares of forest (about 54 football pitches): 1.3% of the forest it had in 2000. The biggest cause was storms, floods and other natural causes (49%), after which forest can grow back. Almost none of it was deforestation, meaning forest cleared for good. Comparing satellite maps from 2000 and 2020, the forest around Huayin grew from about 6,200 hectares to 6,390 hectares, a net gain of about 193 hectares (+3.1%). New forest grew on about 211 hectares, while 18 hectares were lost.
What is the tree count in Huayin?
Huayin has an estimated 31,385 trees across the 12.56 km² of land measured — 10.0% tree cover, 30 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Huayin need?
Huayin needs roughly 94,154 more trees to close a 30-point shortfall against its 40% tree-cover target — about 2,071 t of extra CO₂ absorbed per year once grown.
How are Huayin's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Huayin, 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 Huayin; the tree count is an estimate derived from that cover.
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