Bangkok suffers from a number of environmental problems. It is sinking into sewage-filled canals that often overflow and flood the city in the rainy season. The city needs more sewage treatment facilities and more people cleaning out the garbage from the canals. In the early 2000s Bangkok’s sanitation budget was only $5.5 million. The city has started a campaign to get people to recycle more. It has received international aid to build two modern incinerators for waste disposal. Mass transit and other efforts to reduce traffic have also reduced air pollution somewhat.

Some e-watse such old computers, old batteries and discarded electronics—some of which dangerous toxins such as mercury and dioxin—have been dumped in Thailand.