Bangkok’s air-quality monitoring centre reported a continued rise in PM2.5 concentrations on Monday, with eastern and southern parts of the capital showing the highest readings.

Although most zones remain within Thailand’s acceptable range, several districts have now moved into the moderate category, signalling worsening conditions that may affect sensitive groups.

In northern Bangkok, PM2.5 levels ranged from 21 to 25.5 micrograms per cubic metre, assessed as good.

Eastern Bangkok recorded higher levels of 21 to 34.3 micrograms per cubic metre, placing the zone in the moderate category.

Central Bangkok saw readings between 19.9 and 28.1 micrograms per cubic metre, still considered good overall.

Southern Bangkok measured 18.8 to 32.9 micrograms per cubic metre, resulting in a moderate rating.

Across the Thonburi side, northern districts reported 26.8 to 28.8 micrograms per cubic metre, classified as moderate, while southern Thonburi measured 24 to 33.5 micrograms per cubic metre, also moderate.

The monitoring centre concluded that PM2.5 levels are continuing to trend upward, with the capital’s overall air quality now at a moderate level.