Northern Air Crisis: Nan Governor Orders Closure of Nine National Forests to Combat ‘Toxic Smog’
Nan Province enforces a month-long ban on forest entry across nine reserves, threatening jail time for arsonists as toxic PM2.5 levels reach a crisis
- The Governor of Nan has ordered the immediate closure of nine national forests until April 30 to combat hazardous levels of PM2.5 air pollution, or "toxic smog," caused by illegal burning.
- The ban prohibits all unauthorized entry into specific protected forest areas located in the Na Noi and Wiang Sa districts.
- To enforce the closure and deter arson, authorities have threatened violators with severe penalties, including up to 20 years in prison and fines as high as 200,000 baht.
Nan Province enforces a month-long ban on forest entry across nine reserves, threatening jail time for arsonists as toxic PM2.5 levels reach a crisis.
Authorities in Nan have taken the drastic step of "locking down" nine national forest reserves in a bid to curb the catastrophic levels of PM2.5 pollution currently suffocating Northern Thailand.
The governor of Nan, Chainarong Wongyai, issued the emergency mandate following a surge in illegal burning that has seen air quality in the region—most notably in neighbouring Chiang Mai—reach hazardous levels.
The closure is effective immediately and will remain in place until 30 April 2026, covering critical zones in the Na Noi and Wiang Sa districts.
Restricted Zones and Entry Bans
The mandate prohibits all unauthorised entry into the following protected forest areas:
Huai Nguang and Huai Sali Forests (Na Noi and Wiang Sa)
Southern Nan River Right Bank (Na Noi and Wiang Sa)
Sa Lik and Mae Sakhon Right Bank Forests (Wiang Sa)
Nam Sa and Mae Sakhon Left Bank Forests (Wiang Sa)
Huai Mae Khaning, Nam Wa, and Huai Sali Forests (Wiang Sa)
Upper Nam Sa Right Bank and Na Sao Forests (Wiang Sa)
Provincial officials have clarified that any individual whose entry is deemed "strictly necessary" must first register and obtain written permission from community leaders or the relevant forestry department units.
Draconian Penalties for Arson
To deter those who use fire to clear land or forage, the Governor has warned that legal repercussions for trespassing or starting fires will be severe. Under the current emergency measures, violators face:
Imprisonment: Between 1 and 20 years.
Fines: Up to 200,000 baht.
The Regional Context
The move comes as Northern Thailand grapples with its worst haze crisis in years. The microscopic PM2.5 particles, largely caused by agricultural burning and forest fires, have led to a sharp increase in respiratory illnesses and have significantly dampened the region’s vital tourism sector ahead of the Songkran holidays.
The Nan Provincial Public Relations Office stated that Nan has reached a tipping point. The closure of these forests is a necessary measure to protect public health and preserve our remaining natural heritage from further devastation.
Local law enforcement and forestry rangers have been instructed to increase patrols along the borders of the restricted zones to ensure the lockdown is strictly observed throughout the month.
