PM2.5 in Rayong by district
8 districts in Rayong. Choose one to see PM2.5 now and its history.
Districts ranked by PM2.5 now
Loading latest values
Values come from the station nearest to each district and update hourly.
PM2.5 statistics for Rayong, Jun 2025 to Jun 2026
Yearly average18.7Good
Days over 37.520
Dustiest monthJanuary31.6
Monthly average
Districts by yearly average
| District | Average | Days over limit |
|---|---|---|
| Ban Khai | 21.3 | 32 |
| Khao Chamao | 21.3 | 32 |
| Pluak Daeng | 21.3 | 32 |
| Wang Chan | 21.3 | 32 |
| Ban Chang | 18.0 | 19 |
| Nikhom Phatthana | 18.0 | 19 |
| Klaeng | 16.7 | 9 |
| Mueang Rayong | 16.7 | 9 |
All districts
Frequently asked questions
How many districts in Rayong can I check for PM2.5?
8 districts. Each one shows the reading from its nearest Air4Thai station, with the distance to that station.
At what PM2.5 level should I wear a mask?
Above 25 µg/m³ at-risk groups should wear a surgical mask outdoors for long periods. From 37.6 to 75 the air starts to affect health and an N95 mask is advised. Above 75 avoid outdoor activity.
How often is the data updated?
Readings come from the Pollution Control Department's Air4Thai feed and are refreshed every hour.