Chiang Mai Faces Severe Air Pollution Crisis: Disaster Declaration Considered

Chiang Mai, Thailand, is grappling with a severe air pollution crisis, particularly in the Mueang Na sub-district of Chiang Dao District, where PM2.5 levels have exceeded 125 micrograms per cubic meter for four consecutive days. As a result, local authorities are preparing to declare the area a disaster-stricken zone by March 31, 2026. This declaration would enable the province to access emergency disaster assistance and implement urgent public health measures, including the deployment of mobile medical units starting April 1, 2026.

The Straits TimesChiang Mai tops pollution rankings as toxic haze chokes ThailandChiang Mai under a blanket of toxic air as warning signs reach Pattaya

The alarming rise in PM2.5 levels is attributed to seasonal agricultural burning and forest fires, which are common in northern Thailand. On March 31, Chiang Mai was reported as the world's most polluted major city, with PM2.5 levels reaching 110 micrograms per cubic meter. In the nearby Pai district, levels soared to over 600 micrograms per cubic meter, prompting local residents to express their distress over the unprecedented pollution. The situation has become a significant concern for Thailand's tourism-dependent economy, leading to calls for legislative action from clean air activists.

Chiang Mai tops pollution rankings as toxic haze chokes ThailandChiang Mai under a blanket of toxic air as warning signs reach PattayaThe Straits Times

Chiang Mai's Deputy Governor, Siwakorn Buapong, outlined three immediate measures to protect public health: issuing cell broadcast alerts to residents in high-risk areas, distributing face masks to vulnerable groups, and mobilizing medical teams to address respiratory illnesses. The provincial government is focusing its efforts on the most affected areas to ensure effective budget management and relief operations.

The Straits Times

Despite the urgency of the situation, clean air activists have raised concerns about the stalled clean air bill, which aims to enshrine the right to breathable air and impose taxes on polluters. The bill's progress has been hindered by the dissolution of parliament, and activists warn that if not revived soon, it may need to start over in the legislative process. This legislative inaction comes as over 10 million people in Thailand required treatment for pollution-related health issues in 2023.

Chiang Mai tops pollution rankings as toxic haze chokes Thailand

While Chiang Mai's air quality crisis is dire, reports indicate that other regions, including Pattaya, are on alert for potential worsening conditions. The seasonal haze, driven by shifting wind patterns and agricultural practices, could lead to declining air quality in eastern provinces if the situation escalates. Local authorities are monitoring the situation closely, urging residents to prepare for possible health impacts.

Chiang Mai under a blanket of toxic air as warning signs reach Pattaya

• “My eyes burn, my nose burns — but I still have to work. I have a family to support.” — Food delivery rider, Chiang Mai

Chiang Mai under a blanket of toxic air as warning signs reach Pattaya

As Chiang Mai prepares for a potential disaster declaration, the ongoing air quality crisis highlights the urgent need for effective environmental policies and public health measures to protect residents from the harmful effects of pollution.

The Straits Times