TapWaterGuide
Worldwide water safety reference

Is tap water safe to drink? Check any country or city.

The worldwide reference for tap water safety, built on WHO, EPA, EWG, and CDC guidance — for travelers and for checking your own city.

205
Countries Covered
268
Cities Covered
WHO · EPA · EWG · CDC
Data Sources

Explore the World Safety Map

Every country colored by tap water safety rating — click any country for its full guide.

Open the map →

Popular Countries

JapanMexicoItalyThailandIndiaSpainFranceCosta RicaGreeceVietnamMoroccoChile
Browse all 205 countries →

Popular World Cities

Paris Safe
France
London Safe
United Kingdom
Rome Safe
Italy
Tokyo Safe
Japan
Bangkok Not Safe
Thailand
Bali (Denpasar) Not Safe
Indonesia
Dubai Generally Safe
United Arab Emirates
Cancún Not Safe
Mexico
Mexico City Not Safe
Mexico
Madrid Safe
Spain
Copenhagen Safe
Denmark
Milan Safe
Italy
Browse all world cities →

Popular US Cities

New York City Safe
New York
Chicago Safe
Illinois
Los Angeles Safe
California
San Francisco Safe
California
Houston Safe
Texas
Miami Safe
Florida
Seattle Safe
Washington
Las Vegas Safe
Nevada
See all US city rankings →

Best Tap Water Worldwide

Countries where tap water is safest and best-tasting, from Iceland to Singapore.

Countries to Avoid Tap Water

Where to stick to bottled or filtered water, and why.

Best US City Water

Which American cities have the cleanest municipal tap water, and why.

Water Hardness Data

Check hardness levels and contaminant data for any city or country.