Thailand’s parliament has revived long-delayed legislation to recognize clean air as a protected public right, a major step in a country where seasonal smog has become an annual health emergency.
Last week, lawmakers voted 611 to three to advance the Clean Air Act, which now goes to the Senate, parliament’s upper chamber, for scrutiny before it can be submitted to the prime minister and the king for endorsement.
The Clean Air Bill started life as citizen-initiated legislation, first proposed by a coalition of NGOs in 2019 before being taken up by political parties and previous governments. Seven draft versions were later consolidated into a single bill.
The bill would require major emitters in industry, transport and agriculture to pay fees, fines or compensation for damage caused by pollution. It also seeks to trace supply chains, including agricultural imports, to ensure that products linked to open burning or transboundary haze do not escape scrutiny.
At present, air pollution in Thailand is governed by a patchwork of laws, and the new bill is intended to bring those fragmented rules under a more coordinated national framework, while giving local authorities more power to respond to pollution in their own areas.
Thailand’s smog problem
Thailand’s air pollution crisis is most severe during the dry season, especially from December to April, when agricultural burning, forest fires, traffic and industrial emissions combine with stagnant weather.
In 2023, around 10 million people sought medical care for pollution-related illnesses, according to environmental reporting. PM2.5, fine particulate matter small enough to enter the bloodstream though the lungs, is the main concern.
According to the World Health Organization, air pollution contributes to more than 32,000 premature deaths in Thailand each year, including illnesses affecting the heart and lungs.
What does the law call for?
The bill introduces and endorses many progressive policy instruments. It requires authorities to reallocate budgets to support clean-air management and to collect pollution taxes. It provides for local ordinances, pollution control zones and area-specific air quality standards.
The bill would also create stronger air-quality monitoring systems, integrate pollution data across agencies and empower local governments to take action when pollution exceeds safe levels.
It includes measures against open burning, stronger regulation of high-emitting sectors and provisions covering transboundary pollution from outside Thailand.
The bill also envisages a Clean Air Fund that would support pollution reduction, public-health responses and assistance for farmers shifting away from burning.
It also promotes evidence-based solutions by encouraging the use of technology, innovation and public data. Citizen monitoring, local watchdog networks and community sensors would gain greater legitimacy within the clean-air system.
Clean Air Bill a political test
The Clean Air Bill came close to becoming law after a consolidated version passed the House of Representatives in October 2025. It was then sent to the Senate, where it had entered an advanced stage of scrutiny before parliament was dissolved in December.
Prime Minister Anutin Charnvirakul’s new government, which took office in April, had only a limited window to ask parliament to resume bills left unfinished by the previous legislature.
However, several members of Anutin’s ruling Bhumjaithai Party opposed the legislation, arguing that it could impose new costs on businesses and duplicate existing laws.
During a parliamentary debate in early April, Bhumjaithai lawmaker Supachai Jaisamut argued that while he agrees with the bill’s principles, he opposes its broad powers for officials, which could allow searches, seizures, asset freezes and business shutdown orders without court warrants.
Economic impact of pollution laws
Business groups and conservative lawmakers have also warned that pollution fees, clean-air levies and risk-guarantee mechanisms could raise operating costs at a difficult moment for the Thai economy.
Thailand’s 2026 growth outlook remains modest, with the World Bank projecting growth of just 1.6%. Rising energy costs linked to tensions in the Middle East have hit the economy hard.
In mid-April, Anutin vowed tougher action on wildfires and PM2.5Â smog, and publicly declared his support for the Clean Air Bill, including restrictions on imports of farm products linked to burning in neighboring countries.
His government subsequently reintroduced the bill, forcing a new vote in the House of Representatives.
«A likely scenario is that the Senate will call for revisions, citing concerns such as overlapping laws, burdens on the business sector and the scope of authority of government agencies,»Â Piyapong Boossabong, associate professor at Chiang Mai University’s School of Public Policy, told DW.
«The bill may not be finalized as quickly as many parties had hoped,»Â he added.
Trouble with enforcementÂ
Another factor is whether authorities will enforce the law, said Piyapong Boossabong, adding that «Thailand has many progressive laws that are never effectively enforced.»
Thailand’s biggest clean-air problem is PM2.5 pollution generated by agricultural burning and forest fires by individuals or farmers.
Successive Thai governments have allegedly failed to crack down consistently, partly because burning crop stubble is tied to rural livelihoods and powerful agribusiness supply chains.
«Thailand’s regulatory system cannot rely solely on self-enforcement of pollution standards, and it remains to be seen if the Anutin government is actually serious about enforcement of a potential clean air mechanism,» said Mark Cogan, a regional expert and associate professor at Kansai Gaidai University in Japan.
On the surface, the idea of «polluter pays» works, and it is common in developed, mature economies such as those in the European Union, Cogan told DW.
There are some small states that have variations on the principle that end up falling short, such as in Malaysia, where weak enforcement and difficulties identifying polluters have limited accountability in pollution cases.
«A more effective mechanism might be that there would be additional mechanisms to mitigate public harm by putting part of the liability on the government if polluters are not easily identifiable,» Cogan added.
There is also the problem of geography. The bill can only be enforced within Thailand, while much of the haze that affects the country’s north is transboundary, drifting across borders from burning in neighboring states.
«Based on hotspot data, the Clean Air Bill may be able to reduce only around 30% of overall air pollution,» Boossabong said.
Edited by: Wesley RahnÂ
