City report · Thailand
Rayong Air quality today
Air quality in Rayong currently reads AQI 49 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 49
Good
- PM2.5, fine particles (µg/m³)
- 8.8
- tree cover
- 34.3%
- trees in this area
- 106K
- more trees needed
- 0
Measured across a 2 km radius around Noen Phra Sub-district, Mueang Rayong District, Rayong, Thailand (12.57 km²), from a satellite image of Jul 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Rayong · AQI 49 (Good)
Rayong's tree count comes to 106,356 trees across 12.41 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Rayong today: AQI 49, Good
Main pollutant: PM2.5 · Observed Nov 11, 22:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Rayong Provincial Stadium, 2.5 km away
Health signal
Air quality is satisfactory for everyone.
PM2.5
8.8
PM10
30.0
NO₂
5.6
O₃
64.8
SO₂
0.0
CO
229.1
Data: OpenAQ · Air4Thai, Pollution Control Department, Thailand · Air4Thai
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Rayong's daily AQI at 38 on average, from 20 on Nov 10 to an hourly peak of 75 on Nov 5.
Where Rayong stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Rayong: Healthy tree cover
34.3% tree cover against a 30% healthy-neighborhood target, across 12.41 km² of land.
Trees in this area
106,356
Target trees
106,356
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Rayong lost?
Since 2001, the area within 10 km of Rayong has lost about 818 hectares of forest (about 1,100 football pitches): 31% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from January 2017 of a 5 × 5 km area about 7 km north of the city center.
- Forest lost since 2001
- 818 haabout 1,100 football pitches
- Share of its forest
- 31%of what there was in 2000
- Cleared for good
- 814 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 36 hectares a year in 2021–2025, down from 63 hectares a year in 2016–2020. The worst year was 2017, when about 107 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 | 16 ha | under 1 ha | 16 ha |
| 2002 | 23 ha | under 1 ha | 23 ha |
| 2003 | 24 ha | under 1 ha | 24 ha |
| 2004 | 20 ha | under 1 ha | 20 ha |
| 2005 | 8 ha | under 1 ha | 8 ha |
| 2006 | 37 ha | under 1 ha | 37 ha |
| 2007 | 31 ha | under 1 ha | 31 ha |
| 2008 | 20 ha | under 1 ha | 20 ha |
| 2009 | 24 ha | under 1 ha | 24 ha |
| 2010 | 15 ha | under 1 ha | 15 ha |
| 2011 | 21 ha | under 1 ha | 21 ha |
| 2012 | 15 ha | under 1 ha | 15 ha |
| 2013 | 9 ha | under 1 ha | 9 ha |
| 2014 | 34 ha | under 1 ha | 34 ha |
| 2015 | 25 ha | under 1 ha | 25 ha |
| 2016 | 45 ha | under 1 ha | 45 ha |
| 2017 | 106 ha | 1 ha | 107 ha |
| 2018 | 52 ha | under 1 ha | 52 ha |
| 2019 | 57 ha | under 1 ha | 57 ha |
| 2020 | 54 ha | under 1 ha | 54 ha |
| 2021 | 25 ha | under 1 ha | 25 ha |
| 2022 | 67 ha | under 1 ha | 67 ha |
| 2023 | 36 ha | under 1 ha | 36 ha |
| 2024 | 27 ha | under 1 ha | 27 ha |
| 2025 | 27 ha | under 1 ha | 27 ha |
What is causing deforestation around Rayong?
- Farms, pasture and plantationscleared for good73% · 598 ha
- Towns and roadscleared for good27% · 217 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
- 5,080 ha
- Forest in 2020
- 4,700 ha
- Overall change
- −376 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Rayong shrank from about 5,080 hectares to 4,700 hectares, a net loss of about 376 hectares (−7.4%). New forest grew on about 480 hectares, but 856 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
In the same region
Measured cities near Rayong
Same 2 km radius, same index — so they compare directly.
- Pattaya49.4 km
Thailand
- Tree cover
- 14%
- Air quality
- 51
- Si Racha65.1 km
Thailand
- Tree cover
- 39%
- Air quality
- 51
- Chon Buri81.4 km
Thailand
- Tree cover
- 22%
- Air quality
- 64
- Samut Prakan124.5 km
Thailand
- Tree cover
- 31%
- Air quality
- 61
- Latkrabang128.9 km
Thailand
- Tree cover
- 37%
- Air quality
- 58
- Phra Pradaeng134.0 km
Thailand
- Tree cover
- 25%
- Air quality
- 58
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Frequently asked
Questions about Rayong
What is the air quality (AQI) in Rayong right now?
The latest reading for Rayong shows an AQI of 49 (Good), measured Nov 11, 22:00 local time by the Rayong Provincial Stadium ground monitoring station, 2.5 km away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Rayong today?
At AQI 49 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Rayong been like this week?
Over the last 7 days, the CAMS air-quality model put Rayong's daily AQI at 38 on average, from 20 on Nov 10 to an hourly peak of 75 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Rayong lost since 2001?
Since 2001, the area within 10 km of Rayong has lost about 818 hectares of forest (about 1,100 football pitches): 31% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss is slowing down: about 36 hectares a year in 2021–2025, down from 63 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Rayong shrank from about 5,080 hectares to 4,700 hectares, a net loss of about 376 hectares (−7.4%). New forest grew on about 480 hectares, but 856 hectares were lost.
What is the tree count in Rayong?
Rayong has an estimated 106,356 trees across the 12.41 km² of land measured — 34.3% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Rayong need?
Rayong has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Rayong's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Noen Phra Sub-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 Noen Phra Sub-district; the tree count is an estimate derived from that cover.
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