Is Oía Tap Water Safe To Drink?
No, it's not advisable to drink the tap water.
Tap water in Oía is generally treated and considered safe to drink when supplied through the municipal water network. Santorini relies heavily on desalination, so the water may taste salty or have a strong mineral flavor.
Many residents and visitors choose bottled or filtered water because taste and quality can vary with building plumbing and local storage tanks. If the water looks cloudy, smells unusual, or comes from a private cistern, use bottled water instead.
Last checked: 2026-08-31
Greece is ranked as number 17 globally with a score of 92% in the water quality EPI research conducted by Yale University.
Source of Water in Oía, Greece
Tap water in Oía is supplied through the municipal water network operated by DEYA Thiras. Santorini relies mainly on seawater desalination because the island has limited rainfall and few dependable freshwater sources.
The treated water is stored in local reservoirs and tanks before distribution to homes and businesses. Supplemental supplies may come from licensed groundwater wells and transported water, especially during periods of high demand.
Oía Drinking Fountains
Public drinking fountains in Oía generally use treated municipal water that meets Greek and European drinking-water standards. They are safe to use when clearly marked as potable and regularly maintained.
Do not drink from fountains marked non-potable, decorative, or lacking a drinking-water sign, since maintenance and water quality can vary. When no status is displayed, use bottled water instead.
Drinking Water Map
Here is a map showing all the locations of drinking water spots in Oía. 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.