Is There a Urine Detector for Swimming Pools?

Adventure pool at Wailea Beach Resort – Marriott, Maui

Marriott

Have you ever wondered whether there really is such a chemical as a pool urine detector or pool urine indicator dye? Such a dye supposedly clouds or colors the water or produces a color when someone urinates in a swimming pool, as we've seen in movies and on TV. But does a urine indicator really exist?

Is There Truth to the Rumor?

No. There is no chemical which changes color when someone urinates in a swimming pool. There are dyes which could cloud, change color, or produce a color in response to urine, but these chemicals would also be activated by other compounds, producing embarrassing false-positives.

Though there is no such thing as a urine-detecting dye, you can purchase signs that prey upon the misconception that a urine indicator exists. The signs, which warn the pool is being monitored with a chemical "wee alert," are believed to be an effective deterrent against urination in a pool, particularly with adult swimmers.

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Helmenstine, Anne Marie, Ph.D. "Is There a Urine Detector for Swimming Pools?" ThoughtCo, Sep. 30, 2022, thoughtco.com/pool-urine-indicator-dye-myth-609419. Helmenstine, Anne Marie, Ph.D. (2022, September 30). Is There a Urine Detector for Swimming Pools? Retrieved from https://www.thoughtco.com/pool-urine-indicator-dye-myth-609419 Helmenstine, Anne Marie, Ph.D. "Is There a Urine Detector for Swimming Pools?" ThoughtCo. https://www.thoughtco.com/pool-urine-indicator-dye-myth-609419 (accessed March 28, 2024).