City report · Jiangsu, China
Rugao Air quality today
Air quality in Rugao currently reads AQI 93 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 93
Moderate
- PM2.5, fine particles (µg/m³)
- 26.2
- tree cover
- 33.0%
- trees in this area
- 104K
- more trees needed
- 0
Measured across a 2 km radius around Rugao, Nantong, Jiangsu, China (12.57 km²), from a satellite image of Jul 31, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Rugao · AQI 93 (Moderate)
Rugao's tree count comes to 103,673 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Rugao today: AQI 93, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 12:00 local time via Open-Meteo / CAMS, corrected with 33 ground-station cities within 245 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 33 station cities within 245 km, e.g. Nantong and Taizhou
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
26.2
PM10
39.6
NO₂
38.7
O₃
35.0
SO₂
17.2
CO
294.0
- 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 Rugao's daily AQI at 97 on average, from 49 on Nov 9 to an hourly peak of 203 on Nov 11.
Where Rugao stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Rugao: Healthy tree cover
33.0% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
103,673
Target trees
103,673
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Rugao lost?
Since 2001, the area within 10 km of Rugao has lost about 9 hectares of forest (about 13 football pitches): 3.8% of the forest it had in 2000. Most of it (78%) was deforestation, forest cleared for good, mainly for towns and roads.
2019: satellite photo from June 2019 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 9 haabout 13 football pitches
- Share of its forest
- 3.8%of what there was in 2000
- Cleared for good
- 7 hadeforestation: turned into farms, mines or towns
The worst year was 2021, when about 5 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 | 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 | 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 | 5 ha | under 1 ha | 5 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 Rugao?
- Towns and roadscleared for good67% · 6 ha
- Farms, pasture and plantationscleared for good11% · 1 ha
- Unknown causescause unknown21% · 2 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
- 1,900 ha
- Forest in 2020
- 2,390 ha
- Overall change
- +491 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Rugao grew from about 1,900 hectares to 2,390 hectares, a net gain of about 491 hectares (+26%). New forest grew on about 497 hectares, while 6 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 Rugao
What is the air quality (AQI) in Rugao right now?
The latest reading for Rugao shows an AQI of 93 (Moderate), observed Nov 11, 12:00 local time via Open-Meteo / CAMS, corrected with 33 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 Rugao today?
At AQI 93 (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 Rugao been like this week?
Over the last 7 days, the CAMS air-quality model put Rugao's daily AQI at 97 on average, from 49 on Nov 9 to an hourly peak of 203 on Nov 11. On 3 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Rugao lost since 2001?
Since 2001, the area within 10 km of Rugao has lost about 9 hectares of forest (about 13 football pitches): 3.8% of the forest it had in 2000. Most of it (78%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Rugao grew from about 1,900 hectares to 2,390 hectares, a net gain of about 491 hectares (+26%). New forest grew on about 497 hectares, while 6 hectares were lost.
What is the tree count in Rugao?
Rugao has an estimated 103,673 trees across the 12.57 km² measured — 33.0% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Rugao need?
Rugao has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Rugao'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 Rugao; the tree count is an estimate derived from that cover.
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