Water Science

Accessible explanations of water treatment, contamination, testing, boiling, and the standards used to assess drinking water safety.

Auckland skyline and harbour representing monitored public drinking water systems

How Governments Test Drinking Water

How public authorities sample drinking water, test for microbes and chemicals, investigate failures and issue local warnings.

Historic Havana buildings illustrating ageing infrastructure and drinking water contamination risks

What Causes Water Contamination?

A clear guide to how drinking water becomes contaminated, from sewage and damaged pipes to flooding, farming and poor storage.

Explore More Travel Water Safety Topics

Continue exploring practical travel water safety guides covering trip planning, hotel tap water, traveller health, water science and everyday questions that can arise during a trip.

Toothbrush prepared for safe brushing and drinking water choices before travelling

Before You Travel

Practical guidance to help travellers research drinking water safety, understand advisories, and prepare before leaving home.

Clear tap water being poured into a glass for travel health and hydration guidance

Travel Health

Clear, responsible information about hydration, traveller’s diarrhoea, waterborne illness, and when medical attention may be needed.

Traveller filling a reusable bottle while planning a destination with safe tap water

Travel Planning

Destination-focused guides that help travellers compare drinking water safety across countries, regions, and popular travel locations.

Explore Tap Water Safety by Region

Browse complete drinking water safety guides by region, with practical tap water information, health advice and traveller recommendations for destinations worldwide.

Africa

Complete tap water safety information for African countries across North Africa, East Africa, West Africa, Southern Africa, and Central Africa.

Asia

Comprehensive tap water safety information for countries across Asia, including Southeast Asia, East Asia, South Asia, and Central Asia.

Caribbean

Complete tap water safety guides for Caribbean islands including Jamaica, Bahamas, Dominican Republic, Barbados, Aruba, Trinidad and Tobago, and all major island destinations.

Central America

Comprehensive tap water safety information for Central American countries including Belize, Costa Rica, Panama, Guatemala, Honduras, El Salvador, and Nicaragua.

Europe

Complete tap water safety guides for European countries, covering Western Europe, Eastern Europe, Southern Europe, and Northern Europe.

Middle East

Water safety information for Middle Eastern countries including the Gulf states, Levant, and Arabian Peninsula.

North America

Tap water safety information for North American countries including the United States, Canada, Mexico

Oceania

Tap water safety guides for Oceania including Australia, New Zealand, and Pacific Island nations.

South America

Water safety guides for South American countries covering the entire continent from Colombia to Argentina.