Is Yokohama Tap Water Safe To Drink?
Yes! The tap water is safe to drink.
Tap water in Yokohama, Japan, meets strict national safety standards and is treated for contaminants. It is generally safe for drinking.
Japan's water quality is regulated by the Ministry of Health, Labour and Welfare, ensuring low levels of harmful substances and regular testing.
Many residents drink tap water directly. However, some may prefer boiling or filtering for taste, though it is not required for safety reasons.
Last checked: 2025-04-25
Japan is ranked as number 38 globally with a score of 78.7% in the water quality EPI research conducted by Yale University.
Source of Water in Yokohama, Japan
Yokohama's tap water primarily comes from the Sagami and Tama River water sources. These rivers supply treated water to the city.
Water is stored in reservoirs and undergoes advanced purification processes before distribution to ensure safety and quality.
Groundwater supplements surface water during high demand or drought periods, maintaining a stable and reliable water supply.
Yokohama Drinking Fountains
Public drinking fountains in Yokohama generally use treated tap water, meeting safety standards and considered safe for use.
Regular maintenance is conducted to ensure cleanliness and hygiene, reducing risks of contamination.
Users should observe fountain conditions; if visibly dirty, using bottled water or personal filters is advisable.
Drinking Water Map
Here is a map showing all the locations of drinking water spots in Yokohama. You can click on each water drop to open the spot directly in Google Maps for directions.
Nearby Places
About the Author
Hi, I'm Emily Hartman, a researcher and water quality specialist with a background in public health.
I've spent the last few years studying how everyday water systems impact our health, and I'm passionate about making that information clear and useful for everyone.
Safe, clean tap water isn't just my job — it's something I truly care about.