PM2.5 in Samut Prakan by district
6 districts in Samut Prakan. 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 Samut Prakan, Jun 2025 to Jun 2026
Yearly average22.9Good
Days over 37.534
Dustiest monthJanuary37.5
Monthly average
Districts by yearly average
| District | Average | Days over limit |
|---|---|---|
| Mueang Samut Prakan | 29.1 | 67 |
| Phra Pradaeng | 24.4 | 29 |
| Bang Bo | 20.6 | 28 |
| Bang Phli | 20.6 | 28 |
| Bang Sao Thong | 20.6 | 28 |
| Phra Samut Chedi | 17.4 | 13 |
All districts
Frequently asked questions
How many districts in Samut Prakan can I check for PM2.5?
6 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.