The Countries With the Safest Tap Water in the World
Tap water is one of the great quiet achievements of modern life — in some countries you can fill a glass straight from the faucet and never think twice. In others, a single sip can make you sick. So which countries actually have the safest, cleanest tap water in the world?
We score all 195 countries from 0–100 using official WHO/UNICEF data on safely managed drinking water, blended with a traveler-drinkability assessment. Here’s how the top of the list looks — and every country links to its full breakdown.
The 10 countries with the safest tap water
- 1Iceland97
- 2Denmark95
- 3Finland95
- 4Liechtenstein95
- 5Netherlands95
- 6Norway95
- 7Sweden95
- 8Switzerland95
- 9Austria94
- 10Germany94
Notice a pattern: the leaders are concentrated in Northern and Western Europe, plus a few standouts like Singapore, Japan, New Zealand and Canada. These countries pair strong treatment with tight, transparent monitoring.
What makes tap water “safe”?
A safe public supply usually comes down to three things: treatment (filtering and disinfecting the water), distribution (clean pipes and reliable pressure so nothing seeps back in), and monitoring (frequent testing with public results). The best countries do all three consistently. Where any link is weak — aging pipes, intermittent supply, patchy testing — safety drops.
Where tap water is least safe
At the other end of the scale, tap water is best avoided straight from the tap. In these countries, filtering, boiling, or bottled water is the norm:
- 1Central African Republic14
- 2Democratic Republic of the Congo16
- 3Haiti16
- 4Somalia16
- 5South Sudan16
- 6Chad17
- 7Yemen18
- 8Sierra Leone19
How we rank tap water safety
Each score blends official “safely managed drinking water” data with a drinkability assessment, then rates four everyday uses — drinking, brushing your teeth, ice, and cooking. Full details are in our methodology. You can also check any country, or drill into US states and French régions individually.
Frequently asked questions
Which country has the safest tap water in the world?
Countries like Iceland, Switzerland, Finland, Norway and Denmark consistently top the rankings — their tap water is treated to a high standard, tightly monitored, and reliably safe to drink straight from the tap.
Is tap water safe to drink across Europe?
In most of Western and Northern Europe, yes — tap water is safe and among the best in the world. Quality can vary in parts of Eastern and Southern Europe, so check the specific country before you drink.
Does a high score mean the water is risk-free?
No. A high national score means the public supply is safe and well-managed, but localized risks (such as lead from old household plumbing) can still exist. When in doubt, filter or use bottled water.