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5 sourced facts about swimming pools, each with the context behind the number. 4 more are in today's round and appear here after it closes.
Answerabout 660,000 gallons (2,500 m³)
World Aquatics sets the dimensions; at the 2-meter minimum depth that's 2.5 million liters.
Source: World Aquatics specifications, via Wikipedia en.wikipedia.org
Answerabout 309,000
The other 10.4 million or so belong to homes and individuals — and many 'public' pools sit at schools or hotels.
Source: Marketplace, citing the Association of Pool & Spa Professionals (2023) marketplace.org
Answer376 per year
Nearly 80 percent of those children were younger than five.
Source: U.S. Consumer Product Safety Commission cpsc.gov
Answermore than 7 days
It's so chlorine-tolerant that it caused 89% of illnesses with a known cause in U.S. outbreaks linked to pools and other treated recreational water from 2000 to 2014.
Source: CDC, Morbidity and Mortality Weekly Report (2018) cdc.gov
AnswerHotels (32% of outbreaks)
Hotels accounted for 157 of 493 reported outbreaks, and more than half of all outbreaks started in June through August.
Source: CDC, Morbidity and Mortality Weekly Report (2018) cdc.gov