Is Otaru Tap Water Safe To Drink?
Yes! The tap water is safe to drink.
Yes. Tap water in Otaru is treated and supplied under Japan’s national drinking-water quality standards, and it is generally safe to drink directly from the tap.
Water quality can be affected by a building’s internal pipes or storage tanks. If the water looks discolored or has an unusual smell, let it run briefly and check with the building manager.
Last checked: 2026-11-09
Japan is ranked as number 41 globally with a score of 78.1% in the water quality EPI research conducted by Yale University.
Source of Water in Otaru, Japan
Otaru’s tap water comes from local river catchments, including the Katsunai and Asari rivers. These rivers flow from the mountains around the city and supply parts of Otaru’s water system.
The raw water is treated at municipal water treatment plants before it reaches homes and businesses. Treatment includes filtration and disinfection to meet Japan’s drinking-water standards.
Otaru Drinking Fountains
Public drinking fountains in Otaru are generally safe to use when they are operating and intended for drinking. The city’s municipal water is treated and regulated under Japan’s drinking-water standards.
Avoid fountains marked non-potable, shut off, or visibly dirty, and do not drink from decorative water features. If a fountain is not clearly designated for drinking, choose a different water source.
Drinking Water Map
Here is a map showing all the locations of drinking water spots in Otaru. You can click on each water drop to open the spot directly in Google Maps for directions. For easy access on the go, download our iOS app to find water fountains nearby.
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.