If you’re planning a trip to the Land of Smiles, you find yourself wondering if you can drink the water in Thailand. In this article you’ll get all the facts and practical information you need about drinking tap water in Thailand, the drinking water quality in Thailand, filtered water, bottled water, drinking water when showering, swimming, and brushing your teeth, so that you can have a safe trip to this fascinating country.

Where Does Thailand’s Drinking Water Come From?

The majority of Thailand’s drinking water comes from two primary sources: surface water and groundwater. About 70% of Thailand’s water supply is made up of surface water.

Most of the water is collected from rivers, particularly the Chao Phraya and Mekong Rivers, which are the most important. The water is stored in almost 1000 dams across the country. The biggest is the Bhumibol Dam on the Ping River which is part of the Chao Phraya River system.

Groundwater makes up the other 30% of Thailand’s water supply, extracted from wells and springs. Groundwater is used most in the Central Plains and Northeast regions, tapping into the large aquifers there. There are at least 20,000 registered wells in Thailand.

Thailand’s Metropolitan Waterworks Authority serves over 11 million people in and around Bangkok, It’s water treatment plants use sedimentation, filtration, and disinfection processes, which aligns with World Health Organization standards.

In metropolitan areas like Bangkok, the Metropolitan Waterworks Authority (MWA) supplies water, which is treated and chlorinated to eliminate bacteria and parasites. The MWA conducts over 300,000 water quality tests annually to ensure safety standards.

So now you know where Thailand’s water comes from and how it’s treated, but will you get sick if you drink it? Let’s answer that question next.

So is it Safe to Drink Tap Water in Thailand?

The quality of water that comes out of the tap across the different parts of Thailand varies considerably.

And while it is safe to drink tap water in Bangkok because it meets Thai FDA standards, the tap water contains traces of heavy metals like lead, but within limits legal in Thailand.

I don’t like the lead content in Thailand’s drinking water and neither do the locals. That’s why they drink more than 45 billion liters of bottled water each year.

In more rural areas, water quality might not be as high as in Bangkok because of a less rigorous treatment process and/or because of old outdated pipe systems and I certainly don’t drink tap water in rural areas.

If you drink tap water that isn’t clean, it can lead to contracting illnesses such as travelers’ diarrhea, typhoid, and Hepatitis A, especially for travellers who aren’t used to the local microbes.

The bottom line – if you aren’t used to the food and water in Southeast Asia, it’s much safer to use bottled water for drinking and brushing your teeth to avoid tummy upsets.

Can I brush my teeth with Thailand tap water?

Technically, the tap water in major cities, which undergoes rigorous treatment, should be safe for brushing teeth. However, if you’re in more rural areas where water purification standards may not be as high, you could be at risk.

To err on the side of caution, many seasoned travelers and health experts recommend using bottled water for brushing your teeth.

Alternatively, you can boil tap water for at least a minute, which should kill most bacteria and parasites, or use water purification tablets or portable purifiers.

I have always brushed my teeth in Thailand with boiled water, but these days I used a water bottle with a purifier.

You will find almost all hotels supply a couple of bottles of water in the bathroom to use when brushing your teeth. These are generally replenished daily.

The bottom line is – while it’s possible to use tap water for brushing teeth in Thailand, it’s safer to avoid doing so, especially if you’re outside of the major cities.

Public Filtered Drinking Water Dispensers

Thailand has made significant strides in improving access to clean water, with initiatives such as public drinking fountains that provide free filtered tap water.

These filtered water stations, found throughout public spaces such as parks and squares, provide a free and safe source of drinking water.

They are frequently maintained and monitored for quality. So, whether you’re visiting a park, museum, or any public space, you can fill up your water bottle for free and know you’re drinking safe and clean water.

Should I drink Bottled Water in Thailand

As a traveler, it’s always safer to drink bottled water in Thailand. BUT, buy reputable brands that you are familiar with.

Bottled water is readily available throughout the country, and it’s inexpensive. With a wide variety of international brands readily available in stores across the city, you can choose from still or sparkling, mineral-enriched, or pure spring water.

Always ensure that the seal is intact before you drink to avoid any possible contamination.

However, it’s worth noting the environmental implications of consuming bottled water. The production and disposal of plastic bottles contribute to pollution and resource depletion.

You might instead want to consider drinking tap water in Thailand that you have filtered before drinking, rather than buying bottled drinking water.

Reusable Filter Water Bottles

Alternatively, consider bringing along a reusable water bottle with a built-in filter. This can be a more eco-friendly choice, and you’ll also avoid the potential health risks associated with disposable plastic bottles.

This strategy minimizes your environmental impact, providing a balance between personal comfort and ecological responsibility.

The built-in filters usually utilize activated carbon or more advanced technology like microfiltration or UV sterilization to remove contaminants, reduce chlorine taste, and in some cases, eliminate harmful bacteria and protozoa.

This means that not only can you safely use tap water for brushing your teeth and as drinking water, but you’re also equipped for adventures off the beaten path where water safety might be a concern.

These water filter bottles offer an excellent solution for the eco-conscious traveler. They reduce reliance on single-use plastic bottles, leading to less environmental pollution and waste.

You will also save money over time, especially in locations where bottled water is pricey. So whether you’re sipping water in a cafe or hiking in the mountains around Chiang Mai, filtered water bottles keep you hydrated and responsible.

Frequently Asked Questions about Tap Water in Thailand

Keep Planning Your Trip to Thailand

• 42 Bangkok Tips For First Timers: Must-Read Guide
• How To Get Around Bangkok: Public Transport For Visitors
• The Chao Phraya Tourist Boat: Sightseeing Tips For Every Stop
• 12 Things to Know Before Going to Thailand
• Simple Thai Words and Phrases for Traveling in Thailand