In a study released Wednesday, Canadian researchers determined that the average swimming pool contains about 20 gallons of urine, CBS News reported.

Using a synthetic sweetener called acesulfame-K (ACE), the researchers tested the concentration of ACE over three weeks in two different-sized pools, CBS News reported.

Researchers estimated that a 220,000-gallon pool, which is one-third the size of an Olympic pool, had an estimated volume of 19.81 gallons. A 110-gallon pool contained an estimated 7.92 gallons, the study said. Researchers tested 250 samples from 31 pools and hot tubs, CBS News reported.

The study was published in “Environmental Science & Letters, CBS News reported.

CDC Warning: Dangerous Parasite Could Be Lurking In Public Pools, Water Parks

About the Author

Keep Reading

Georgia Power's Plant Bowen in Cartersville is shown. The utility wants to add about 10,000 megawatts of power supplies in just five years, mainly to serve data centers. (Hyosyb Shin/AJC 2015)

Credit: Hyosub Shin/AJC

Featured

Fulton County Superior Court Judge Robert McBurney — pictured during a hearing Monday, Dec. 15, 2025 — has cleared the way for Georgia's State Election Board to obtain Fulton ballots and other documents from the 2020 election. (Arvin Temkar/AJC)

Credit: Arvin Temkar/AJC