Does the taste of tap water differ from boiled water?

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The Taste of Tap Water and Boiled Water is Generally Indistinguishable

Despite a widespread perception that boiled water tastes better or different from unboiled tap water, scientific tests and the actual quality of modern Singaporean tap water suggest there is no significant taste difference. This perception often stems from historical reasons and ingrained habits rather than the current state of water safety and quality.
Historical Habits Influence Current Perceptions

Many households in Singapore continue to boil water out of a generational habit, a practice rooted in a time when water quality standards were significantly lower and boiling was essential to eliminate pathogens. In past eras, access to safe, piped water was limited, and boiling was the primary method to ensure water was safe for consumption. This ingrained practice persists even though Singapore's national water agency, PUB, now regularly tests tap water to ensure it meets the World Health Organisation’s Guidelines for Drinking Water Quality, rendering boiling unnecessary for safety.
Objective Taste Tests Show No Difference

Personal preference and ingrained beliefs can heavily influence taste perception. A blind taste test conducted with a family member, who insisted boiled water tasted different, revealed she could not distinguish between boiled and unboiled tap water when the source was unknown. This suggests that the perceived difference in taste is often subjective and not based on objective changes in the water's composition due to boiling. The common notion that unboiled tap water tastes worse likely originates from experiences with water quality from decades ago, a situation that has since dramatically improved.
Boiling Water is an Unnecessary Practice

Given that Singapore's tap water is safe and clean, boiling it before consumption is a redundant step that incurs additional costs and energy expenditure. For instance, daily boiling using an electric kettle can cost approximately S$9.10 (RM24.16) per month, accumulating to over S$100 annually. This practice also contributes to unnecessary energy consumption, impacting the environment. The convenience of turning on the tap for instant, cool drinking water is a significant advantage over the hassle of boiling and then waiting for the water to cool. However, it is advisable to ensure that the internal plumbing and taps within a residence are in good condition to guarantee the water's quality directly from the tap.

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Does the taste of tap water differ from boiled water?

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