re: Pool Party Dilemma

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There is a chemical dye that can be added to pool water to id pee polluters

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If this was really a thing, how would you then get the color out of the pool afterwards?

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Only if you tell people about it.

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or, in my case, someone tells me that I have consumed 18 beers and still have not gotten out.

We stayed at a resort that had a swim up bar in the pool. We entertained ourselves sitting on the balcony laughing every time the patrons would get up, make a lap around the perimeter and go sit back down. Everyone of them did it.

That's a myth, but found an interesting read:

https://www.fishersci.com/us/en/education-products/publications/headline-discoveries/2017/issue-3/stop-peeing-the-pool-scientists-can-tell.html#:~:text=Since%20urine%20is%20sterile%2C%20scientists,made%20it%20a%20good%20choice.

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Scientists at the University of Alberta specifically looked at one chlorine byproduct called trychloramine to see if they could tell how much urine was really in pool water. Most people think that the “swimming pool smell” is from chlorine, but the smell is actually from trychloramine. The stronger the smell, the more irritants are present.

Since urine is sterile, scientists needed a marker to signal its presence. They chose acesulfame potassium (also called Ace-K), an artificial sweetener used in food and beverages. Ace-K does not break down in pool water or at normal temperatures and is not digested in the human body, which made it a good choice.

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Then they collected water samples from a city water supply and from two separate swimming pools in Canada — one that held approximately 110,000 gallons of water and the other with about 220,000 gallons.

Samples from the city water supply contained between 12 and 20 nanograms of Ace-K. If there was no urine in the swimming pools, their Ace-K levels would have been similar. Instead, they found over 156 nanograms of Ace-K per liter in the smaller pool and 210 nanograms per liter in the larger pool — the equivalent of eight and 20 gallons of urine per pool, respectively.

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Just a lot of experience in urine testing. Lolol.