tap water

American  

noun

1. water, obtained directly from a faucet or tap, that has not been purified, distilled, or otherwise treated.

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tap water British  

noun

1. water drawn off through taps from pipes in a house, as distinguished from distilled water, mineral water, etc

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Etymology

Origin of tap water

First recorded in 1880–85

Example Sentences

People have been urged not to use tap water for anything other than flushing toilets.

From BBC

Bottled water is being delivered to residents in Killin for a second day and locals have been warned not to use tap water for anything other than flushing toilets.

From BBC

Scottish Water said it was taking samples of the water and advised people in the village not to use their tap water "for any purpose".

From BBC

Aunt Melissa hands me a glass of tap water with what seems to be a genuine smile.

From Literature

A tasting session lasting around an hour was a surprise for South African visitor Dere Vermeulen, 19, who normally drinks tap water.

From Barron's