On 14 Jan 2026, dust levels exceeded safety standards, impacting health in many parts of Thailand. In Bangkok, dust levels are expected to rise until 17 Jan 2026. Channels to check dust levels are open to help residents prepare before going outside.
On 14 Jan 2026, the Pollution Control Department reported on the nationwide air quality situation, finding air quality ranged from very good to levels affecting health.
PM2.5 dust particles exceeding standards were detected in the following areas: Kud Pong Subdistrict, Mueang District, Loei Province; Nai Mueang Subdistrict, Mueang District, Phetchabun Province; Khlong Krachaeng Subdistrict, Mueang District, Phetchaburi Province; Yan Sue Subdistrict, Mueang District, Ang Thong Province; Uthai Mai Subdistrict, Mueang District, Uthai Thani Province; Tha It Subdistrict, Mueang District, Uttaradit Province; Mak Khaeng Subdistrict, Mueang District, Udon Thani Province; Nong Bua Subdistrict, Mueang District, Nong Bua Lamphu Province; Mee Chai Subdistrict, Mueang District, Nong Khai Province; Nok Mueang Subdistrict, Mueang District, Surin Province; Don Kamyan Subdistrict, Mueang District, Suphan Buri Province; Bang Man Subdistrict, Mueang District, Sing Buri Province; Pak Priao Subdistrict, Mueang District, Saraburi Province; Mahachai Subdistrict, Mueang District, Samut Sakhon Province; Om Noi Subdistrict, Krathum Baen District, Samut Sakhon Province; Lat Yai Subdistrict, Mueang District, Samut Songkhram Province; Bang Sao Thong Subdistrict, Bang Sao Thong District, Samut Prakan Province; Pak Nam Subdistrict, Mueang District, Samut Prakan Province; Bang Prong Subdistrict, Mueang District, Samut Prakan Province; Song Khanong Subdistrict, Phra Pradaeng District, Samut Prakan Province; Li Subdistrict, Li District, Lamphun Province; Ban Klang Subdistrict, Mueang District, Lamphun Province.
Talet Chubsorn Subdistrict, Mueang District, Lopburi Province; Nai Mueang Subdistrict, Mueang District, Roi Et Province; Na Mueang Subdistrict, Mueang District, Ratchaburi Province; Taphong Subdistrict, Mueang District, Rayong Province; Huai Pong Subdistrict, Mueang District, Rayong Province; Rayong Provincial Central Stadium, Noen Phra Subdistrict, Mueang District, Rayong Province; Pluak Daeng Subdistrict, Pluak Daeng District, Rayong Province; Talad Subdistrict, Mueang District, Maha Sarakham Province; Nai Mueang Subdistrict, Mueang District, Phitsanulok Province; Khlong Sa Kae Subdistrict, Nakhon Luang District, Phra Nakhon Si Ayutthaya Province; Pratu Chai Subdistrict, Phra Nakhon Si Ayutthaya District, Phra Nakhon Si Ayutthaya Province; Tha Tum Subdistrict, Si Maha Phot District, Prachinburi Province; Khlong Nueng Subdistrict, Khlong Luang District, Pathum Thani Province.
Bang Phut Subdistrict, Pak Kret District, Nonthaburi Province; Talad Kwan Subdistrict, Mueang District, Nonthaburi Province; Nai Mueang Subdistrict, Mueang District, Nakhon Ratchasima Province; Nakhon Pathom Subdistrict, Mueang District, Nakhon Pathom Province; Bang Phra Subdistrict, Mueang District, Trat Province; Tha Thaphao Subdistrict, Mueang District, Chumphon Province; Nai Mueang Subdistrict, Mueang District, Chaiyaphum Province; Ban Kluai Subdistrict, Mueang District, Chainat Province; Bo Win Subdistrict, Si Racha District, Chonburi Province; Wang Yen Subdistrict, Plaeng Yao District, Chachoengsao Province; Nai Mueang Subdistrict, Mueang District, Khon Kaen Province; Kalasin Subdistrict, Mueang District, Kalasin Province; Ban Nuea Subdistrict, Mueang District, Kanchanaburi Province.
Meanwhile, the Bangkok Environment Office has issued a warning that dust levels tend to rise. Meteorological data and ventilation rate (VR) information indicate that until 17 January 2026, some periods will have poor air ventilation, causing PM2.5 dust accumulation to increase in many areas of Bangkok.
The forecast for 12–15 Jan 2026 shows a high risk of poor or very weak air ventilation continuing, with very low ventilation on some days, increasing the chance of dust accumulation in several districts, especially during nighttime to early morning hours.
On 16–17 Jan 2026, ventilation is expected to improve and the situation to ease, but dust accumulation from previous days still requires monitoring.
A particular concern is when ventilation rates remain low for extended periods, allowing PM2.5 dust to accumulate easily and rapidly rise from "yellow → orange → red" levels. Open burning, smoke, or dust from urban activities will worsen the situation. Citizens who witness open burning can report it to Traffy Fondue.
In addition, people can check air quality information before going out through