City report · Sichuan, China
Ziyang Air quality today
Air quality in Ziyang currently reads AQI 119 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
AQI 119
Air quality right now
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 42.8
- tree cover
- 27.9%
- trees in this area
- 81.9K
- more trees needed
- 20.8K
Measured across a 2 km radius around Yanjiang District, Ziyang, Sichuan, China (12.57 km²), from a satellite image of Sep 2, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Ziyang · AQI 119 (Unhealthy for sensitive groups)
Ziyang's tree count comes to 81,866 trees across 11.74 km² of land, 7 points below the 35% tree-cover level considered healthy for this area, so roughly 20,833 more trees would close the gap.
Air quality detail
Air quality in Ziyang today: AQI 119, 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 · qū fǎyuàn, Ziyang (资阳区法院), 1.9 km away
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
42.8
PM10
61.1
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Sichuan Province Environmental Protection Agency (四川省环保重点城市环境空气质量实时监测结果)
- 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 Ziyang's daily AQI at 107 on average, from 63 on Nov 8 to an hourly peak of 162 on Nov 5.
Where Ziyang stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Ziyang: Below target
27.9% tree cover against a 35% healthy-neighborhood target, across 11.74 km² of land.
Trees in this area
81,866
Target trees
102,699
More trees needed
20,833
CO₂ if planted / yr
458.3 t
Deforestation · 2001–2025
How much forest has Ziyang lost?
Since 2001, the area within 10 km of Ziyang has lost about 55 hectares of forest (about 78 football pitches): 3.7% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 55 haabout 78 football pitches
- Share of its forest
- 3.7%of what there was in 2000
- Cleared for good
- 51 hadeforestation: turned into farms, mines or towns
The worst year was 2023, when about 14 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 | 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 | 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 | under 1 ha |
| 2011 | under 1 ha | under 1 ha | 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | 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 | 4 ha | under 1 ha | 4 ha |
| 2019 | 3 ha | under 1 ha | 3 ha |
| 2020 | 5 ha | under 1 ha | 5 ha |
| 2021 | 3 ha | under 1 ha | 3 ha |
| 2022 | 13 ha | under 1 ha | 13 ha |
| 2023 | 13 ha | under 1 ha | 14 ha |
| 2024 | 5 ha | under 1 ha | 5 ha |
| 2025 | 1 ha | 1 ha | 2 ha |
What is causing deforestation around Ziyang?
- Towns and roadscleared for good82% · 45 ha
- Mining and energycleared for good9.6% · 5 ha
- Farms, pasture and plantationscleared for good1.6% · 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
- 14,000 ha
- Forest in 2020
- 13,900 ha
- Overall change
- −64 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Ziyang stayed about the same size, at about 13,900 hectares: new forest grew on about 238 hectares, and about 303 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 Ziyang
What is the air quality (AQI) in Ziyang right now?
The latest reading for Ziyang shows an AQI of 119 (Unhealthy for sensitive groups), measured Nov 12, 01:00 local time by the qū fǎyuàn, Ziyang (资阳区法院) ground monitoring station, 1.9 km away, via OpenAQ. The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Ziyang today?
At AQI 119 (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 Ziyang been like this week?
Over the last 7 days, the CAMS air-quality model put Ziyang's daily AQI at 107 on average, from 63 on Nov 8 to an hourly peak of 162 on Nov 5. On 5 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Ziyang lost since 2001?
Since 2001, the area within 10 km of Ziyang has lost about 55 hectares of forest (about 78 football pitches): 3.7% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Ziyang stayed about the same size, at about 13,900 hectares: new forest grew on about 238 hectares, and about 303 hectares were lost.
What is the tree count in Ziyang?
Ziyang has an estimated 81,866 trees across the 11.74 km² of land measured — 27.9% tree cover, 7 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Ziyang need?
Ziyang needs roughly 20,833 more trees to close a 7-point shortfall against its 35% tree-cover target — about 458.3 t of extra CO₂ absorbed per year once grown.
How are Ziyang's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Yanjiang 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 Yanjiang District; the tree count is an estimate derived from that cover.
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