Northern Thailand Chokes as Toxic Haze Reaches Extreme Levels
Pai— Northern Thailand is grappling with hazardous air pollution this week as seasonal agricultural burning, forest fires and weather conditions pushed particulate levels in Chiang Mai and surrounding areas to among the highest globally, triggering health concerns, disrupting tourism and prompting local emergency measures.
Air quality monitors recorded PM2.5 concentrations exceeding 900 micrograms per cubic meter in parts of Pai, roughly 60 times higher than the World Health Organization’s recommended 24-hour exposure limit, according to monitoring data cited this week. Chiang Mai, Thailand’s second-largest city, consistently ranked among the world’s most polluted major cities during the period.
Residents reported acute health effects linked to prolonged exposure. Pon Doikam, a 36-year-old vendor working outdoors in Chiang Mai, said she experienced nasal bleeding and persistent respiratory irritation after spending hours in polluted conditions. “It feels like you’re trapped in the smoke constantly,” she said.
The pollution surge is part of an annual haze season affecting much of Southeast Asia, driven by crop burning and forest fires. However, locals described current conditions as unusually severe. Geographic factors have compounded the situation, with mountainous terrain trapping smoke and hindering firefighting access to remote forest areas.
Field observations confirmed multiple active fires along routes between Chiang Mai and Pai. Volunteer firefighter Maitree Nuanja said local response capacity remains limited, relying heavily on donated supplies. He noted that teams are operating with constrained fuel and equipment support while facing prolonged exposure to hazardous air.
Authorities confirmed the death of a volunteer firefighter earlier this week, citing suspected exhaustion combined with heat exposure and pre-existing health conditions.Public health risks are particularly acute for vulnerable groups. In Chiang Mai, authorities have set up “dust-free rooms” equipped with air filtration systems to protect residents, including elderly populations.
Watwilai Chaiwan, an 82-year-old resident of a care facility, said the pollution has worsened symptoms such as dizziness and migraines and discouraged outdoor activity.Medical professionals warned of broader health implications.
Thanakrit Im-iam, a doctor in Chiang Mai, said fine particulate matter can penetrate deep into the body, carrying toxins and heavy metals. He reported common symptoms including eye irritation, respiratory inflammation and mucus buildup, adding that long-term exposure could have severe consequences.
The haze has also weighed on tourism, a key economic driver in northern Thailand. Local transport operator Chakkrawat Wichitchaisilp reported a noticeable decline in visitors during what is typically a peak travel season. Visibility across Chiang Mai has been significantly reduced, with skyline views obscured by dense smog.
Government officials held discussions this week to address the crisis, while some districts in Chiang Mai declared disaster zones to expedite financial assistance. However, environmental groups said policy responses remain insufficient.
Kanongnij Sribuaiam of the Thailand Clean Air Network urged faster progress on stalled clean air legislation, warning that delays could force the process to restart if deadlines are missed.
The recurring haze crisis underscores ongoing challenges in managing cross-border pollution, agricultural practices and forest fire control across the region.
