Can I drink tap water in any country?

No, you cannot safely drink tap water in every country. While many developed nations have water supplies that meet strict safety standards, a significant portion of the world still lacks safely managed drinking water. In many popular travel destinations, drinking tap water is not recommended for tourists due to the risk of illness.

Europe: Tap water is generally safe across Western and Northern Europe, with Finland, Iceland, the Netherlands, Norway, Switzerland, and the UK scoring highest for safety. However, safety varies, with Romania, Latvia, and Lithuania scoring lower.
North America, Australia & Japan: Tap water is generally safe to drink in the United States, Canada, Australia, New Zealand, and Japan.
Middle East (UAE, Qatar, Saudi, Bahrain, Oman): Tap water is generally safe, often coming from desalination plants. However, building storage tanks can affect quality, so bottled or filtered water is often preferred by residents.
Africa, South & Southeast Asia, South America & Mexico: In these regions, tap water is generally not safe for tourists. Bottled water with an unbroken seal is the safest option, as even locals may boil their water.
Singapore & South Korea: Singapore is a standout in Asia for safe tap water, and South Korea is also listed as safe by some sources.
Nigeria & Uganda: Tap water safety is a significant concern, and visitors should rely on bottled water.

Traveling soon? See our Travel Essentials page.

Want a deeper dive? ↓

Detailed Answer

A Global Overview

The safety of tap water around the world is a complex issue. The World Health Organization (WHO), which provides the authoritative global guidance on drinking-water quality, notes that a staggering 2.1 billion people still lack safely managed drinking-water services. While many nations have invested heavily in water treatment and infrastructure, others still face significant challenges.

The primary risk from unsafe tap water comes from microbial contamination. Even if the municipal supply is treated, old and ruptured pipes can allow harmful bacteria, viruses, and parasites to enter the water after it leaves the treatment plant.

Regional Breakdown

Europe

Europe boasts some of the safest tap water in the world. Many European nations, including Finland, Iceland, the Netherlands, Norway, Switzerland, and the United Kingdom, achieved a maximum safety score. Other countries like France, Germany, Greece, Italy, Portugal, and Spain also have tap water that is safe to drink in major cities and tourist areas. However, there are local exceptions, such as on smaller Greek and Croatian islands, in rural areas with private wells, or in buildings with old plumbing where water quality can be impacted after it leaves the public network.

Tap water safety is not uniform across Europe. Romania, Latvia, and Lithuania are among the weaker performers on the continent.

North America

Tap water is generally safe to drink across most cities and towns in the United States and Canada. However, local exceptions exist, such as private wells or older buildings with lead plumbing. Travelers should always check for local public health advisories, especially after events like flooding, which can temporarily affect water safety.

Asia

Singapore and Japan are the clear standouts in Asia for tap water safety, with reliable public supplies that visitors can drink without concern. South Korea, Brunei, Hong Kong, and Israel are also listed as having safe tap water by some sources. In other parts of Asia, including many popular travel destinations, tap water is not considered safe for tourists. In countries like China, travelers should treat the local tap water as "unknown" and rely on bottled or properly treated water until local guidance is confirmed.

Australia & Oceania

Tap water is safe across the main public systems in Australia and New Zealand. Major cities like Sydney and Melbourne have closely monitored supplies, and public drinking fountains are common.

Middle East (UAE, Qatar, Saudi Arabia, Bahrain, Oman)

Tap water in the Gulf states, including the UAE, Qatar, Saudi Arabia, Bahrain, and Oman, is often produced by desalination plants and is treated to meet drinking-water standards. The municipal supply is considered safe. However, the main concern is usually the building's internal plumbing and storage tanks, such as those on rooftops. Poorly maintained tanks can affect taste and quality, which is why many residents still prefer bottled or filtered water.

Africa, South & Southeast Asia, South America & Mexico

In these regions, tap water is generally not safe for tourists to drink. Travelers should stick to bottled water with an unbroken seal. Even local people in these countries may often boil their tap water to ensure its safety. It is also advisable to avoid ice in drinks and to brush your teeth with bottled water, as even a small amount of contaminated water can be enough to upset your stomach if your system has not adapted to the local micro-organisms.

What You Need to Know

A country being "safe" generally applies to major cities, not remote areas, which may rely on wells, rainwater tanks, or other unregulated sources.
Even in a safe country, a local boil-water notice can be issued after a natural disaster or water main break. Always check for local advisories.
Residents often drink the tap water because their immune systems have adapted to the local micro-organisms. Tourists do not have this adaptation, making them more vulnerable to illness.
When in doubt, the safest option is to drink bottled water with an unbroken seal.

Real Traveler Experiences

"I spent a month in the UK and drank the tap water everywhere. It was perfectly fine. In Dubai, I also drank the tap water, but the taste was a bit strange, so I switched to bottled water." UK traveler, Forum post

"I made the mistake of using tap water to brush my teeth in Bali and ended up with a bad stomach bug. Now I use bottled water for everything." Bali traveler, Travel forum

"In Singapore, you can drink water straight from the tap in the airport and hotels. It's safe and tastes great." Singapore visitor, Review site

Pro Tips

Before you travel, check the current travel advice from the CDC or other official health sources for your specific destination.
Invest in a reusable water bottle with a built-in filter, but be aware that not all filters can remove all microbial and chemical risks.
When in a region with unsafe tap water, avoid ice in your drinks, as it is often made from the local tap water. Also, avoid raw fruits and vegetables that may have been washed in tap water.
In the Middle East, even if the municipal water is safe, ask your hotel or accommodation about the quality of their internal water storage and filtration systems.

Sources

AskTravel.org gives you the answer first, then the detail. Every answer is built from official sources and updated when rules change. See how we answer: How We Answer.

AskTravel.org is an information website only. Always check local regulations and operator policies before traveling, as rules change frequently.

Search AskTravel.Org

ASKTRAVEL.ORG