Usually your pipes and fittings. The Drinking Water Inspectorate says: “Water in contact with copper, iron or galvanised pipes, tanks or fittings for long periods may pick up a metallic or bitter flavour. This can be more noticeable when the water has been warmed. Flushing of the tap before use will draw fresh water through the pipes and fittings and remove the taste.”
Source: Drinking Water Inspectorate, Taste and Odour in Drinking Water ↗
When to test for lead
“Older brass fittings can also be a source of lead.”
“If you suspect that your home has lead pipes you can ask your water company to test the water at your kitchen tap. If the water company investigates and finds lead pipes or another source of lead in the plumbing system, they should provide you with written advice on what to do.”
Source: Drinking Water Inspectorate, Lead in Drinking Water ↗
When to contact your water company
“If you suddenly notice a particularly bad or strong smell or taste which makes the water unpalatable, you should contact your water company.”
“Your water company will be able to help you find out if there is anything wrong with your household plumbing. They can carry out an inspection and take some tests.”
Source: Drinking Water Inspectorate, Taste and Odour in Drinking Water ↗
Contact your water company
If the taste is sudden or strong, contact your water company.
Find your water company from your postcode
Related pages
Sources
- Drinking Water Inspectorate: Taste and Odour in Drinking Water ↗ · Open Government Licence v3.0 · read 14 October 2026
- Drinking Water Inspectorate: Lead in Drinking Water ↗ · Open Government Licence v3.0 · read 14 October 2026
Contains public sector information licensed under the Open Government Licence v3.0.