Water Supply in Thailand

Understanding the Thai domestic water supply system...

It is not recommended to drink the tap water in Thailand as it may be polluted from old pipes or at its main source. Brushing teeth is generally considered safe, but normal precautions should be taken.

Drinking water can be bought in the form of government regulated 20 litre water bottles. It is also possible to have an agreement with a water company who provide large bottles that fit onto water dispensers/fountains which are available at most department stores. A deposit on initial bottles is required. Bottled water is also available at all the normal outlets.

The Metropolitan Waterworks Authority of Thailand (MWA) provides mains water supply in Bangkok, Nonthaburi, and Samut Prakan.

Outside of Bangkok the Provincial Waterworks Authority (PWA) is responsible for supplying mains water.

To get connected

Many homes in Thailand use ground or surface water for their main source of water supply through the use of holding tanks or sunken wells. However, in other homes water is supplied through mains water supply provided by the Local Waterworks Department.

To get the water supply connected, telephone or visit one of the branch offices of the MWA or the PWA. At least one week's notice is required for connection or disconnection.


Bills can be paid at any one of the offices, at a payment service agents (for example at a post office) or by direct debit. Payments can also be made online via the MWA website. There is a small charge for this service.

Details on how to pay a water bill are available at

Further Information