How to restore your drinking water system


At Welsh Water, our most important responsibility is supplying 1.4m homes and businesses with safe and clean drinking water 24 hours a day, 365 days a year.

During the COVID-19 pandemic, we’ve been doing everything we can to maintain people’s water supply and protect our customers, by delivering over 900 million litres of clean water every day.

As part of our role, we carry out 300,000 water tests every year and work with customers to ensure it’s of a high quality. The UK Government social restrictions placed on businesses and other organisations since 23rd March has seen many buildings and sites close for a prolonged period. In turn, this impacts water quality, as many drinking water systems (including water storage tanks and pipes) within buildings will have been left standing during the lockdown.

This can adversely affect the quality of drinking water and potentially risk people’s health. So, it’s important that certain steps are taken before the building is reoccupied.

Our helpful tips and Q&As below should help guide you through the process.

Frequently Asked Questions

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Re-opening your business

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Advice about your water supply