# there must be something in the water

idiom

Source: https://englishreference.com/idiom/there-must-be-something-in-the-water
Updated: 2026-08-10

## Meaning

There are so many instances of something unusual, such as in people's behavior, that there must be a common cause.

## Examples

- Three friends got married this month; there must be something in the water.
- Four neighbors bought the same red car; there must be something in the water.
- Everyone in our office is having twins this year, so there must be something in the water.
- Every single person at the party is suddenly talking about moving to the countryside, so I think there must be something in the water.
- Given that five of my colleagues announced their resignations in the same week, one cannot help but think there must be something in the water.

## Origin

The phrase originates from the notion that a pervasive chemical or biological substance has been introduced into a local supply of drinking water. It suggests that a shared, unusual behaviour observed in a population is the result of collective ingestion rather than individual agency or coincidence. The expression relies upon the premise that water, as a universal medium, provides a convenient explanation for a sudden and otherwise inexplicable shift in the local temperament.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.