Is Cardiff Tap Water Safe To Drink?

Yes! The tap water is safe to drink.

Yes, tap water in Cardiff is safe to drink. It is supplied by Dŵr Cymru Welsh Water and regulated under strict UK drinking water standards.

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Water Sources
Drinking Fountains

The water is routinely tested for bacteria, chemicals, and other contaminants. If a local issue affects water quality, Welsh Water issues a boil-water or do-not-drink notice to affected customers.

Last checked: 2026-08-31

United Kingdom is ranked as number 2 globally with a score of 98.2% in the water quality EPI research conducted by Yale University.

Source of Water in Cardiff, United Kingdom

Cardiff’s tap water is supplied by Dŵr Cymru Welsh Water, mainly from upland reservoirs and rivers in the Brecon Beacons. Key sources include the Taff Fawr and Taff Fechan reservoir systems in the upper Taff valley.

The raw water is treated at nearby water treatment works to remove particles, microbes, and other impurities. It is then stored in local reservoirs and service tanks before flowing through Cardiff’s mains network to homes and businesses.

Cardiff Drinking Fountains

Public drinking fountains in Cardiff are generally safe to use when they are maintained, clearly designated for drinking water, and connected to the treated mains supply. Welsh drinking water is subject to strict safety standards and regular monitoring.

Do not use a fountain that is damaged, dirty, labelled out of service, or has water with an unusual taste, colour, or smell. After local water-supply problems, follow any official advice before drinking from public fountains.

Drinking Water Map

Here is a map showing all the locations of drinking water spots in Cardiff. 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.

Disclaimer

* The information provided on this website regarding the safety of tap water in Cardiff is sourced from reputable sources such as the World Health Organization (WHO), local water authorities, and the Environmental Performance Index (EPI) from Yale University. While we strive to ensure accuracy and reliability, it's important to note that water quality can vary over time and may be subject to factors beyond our control. Users are encouraged to verify the current water quality status with local authorities or consult additional resources before making decisions regarding water consumption. We disclaim any liability for actions taken based on the information provided on this website.