On January 26, the Department of Royal Rainmaking and Agricultural Aviation intensified efforts to tackle high levels of PM2.5 air pollution in Bangkok and its surrounding provinces. Deputy Director-General Rachen Silparaya announced that, based on meteorological forecasts, air quality in upper Thailand remains poor but is showing signs of improvement due to stronger winds enhancing atmospheric ventilation.
A Super King Air 350 aircraft conducted atmospheric surveillance over Bangkok and neighboring areas between 11:43 and 12:00 at altitudes below 1,500 feet, measuring particle concentrations of 3,500–4,200 particles per cubic centimeter per second near Don Mueang Airport. The data indicated that particulate matter at heights above 3,000 feet is beginning to disperse from the city and surrounding regions.
Following the survey flight, the department launched a coordinated dust-reduction operation involving five units stationed in Phitsanulok, Phrae, Hua Hin (Prachuap Khiri Khan), Rayong, and Kanchanaburi. Using techniques such as dry ice dispersion and water spraying, these units worked to mitigate inversion layers and expel pollutants from key areas, including Prachinburi, Sing Buri, Ratchaburi, Samut Sakhon, and Bangkok. Efforts also extended to lower northern regions, such as Phitsanulok, Phichit, and surrounding areas.
The department confirmed that operations will continue daily, focusing on morning and afternoon hours, until PM2.5 levels drop to a range deemed safe for public health. Residents in affected areas are advised to avoid outdoor activities, wear protective masks when outside, and monitor air quality updates through official channels, including the department’s website and social media platforms.
