Sometimes you may notice a change in the taste or smell of your drinking water. 

The water is often described as having a TCP, antiseptic, metallic, chemical, medicinal or bitter taste or smell and is noticeable when you first run the tap, in boiled drinks, or when a glass of water has stood for a period of time.

We’re required by law to disinfect the water supply, so we add chlorine during the water treatment process to make sure the water remains at the highest quality when it arrives at your tap. But tastes and odors can be caused by the reaction between chlorine (present in tap water) and plastic or rubber components found in common household appliances, such as kettles, tap washers, and the hoses connecting dishwashers and washing machines to the mains supply.

The fact sheets below explain the common causes of taste and smells in drinking water and what you can do to help: