Data is incomplete but so far indicates no great coronavirus risk in water.
Summer always means water, whether it’s an ocean, lake, river, swimming pool or hot tub. But now that we’re worrying more about germs, it’s natural to wonder: Will this season's swimming, surfing, floating and soaking be as safe as it used to be?“There is no data that somebody got infected this way [with coronavirus],” said professor Karin B. Michels, chair of UCLA’s Department of Epidemiology, in a recent interview.
As both professors noted, the chlorine in most swimming pools is enough to inactivate the virus. The U.S. Masters Swimming organization makes the same point in its coronavirus briefing for frequent pool swimmers. Even if it was theoretically possible, “I’m not concerned about the ocean and large lakes,” Michels said. “The dilution effect is so humongous that I don’t think there is a risk that anybody gets infected this way.”
So far, scientists say, there is no data suggesting that the COVID-19 virus remains viable in saltwater. They're also not sure if the virus remains infectious once it has been through a human digestive system or a wastewater treatment plant. As the Surfrider Foundation noted in a recent briefing for surfers, Kim Prather, Scripps Institution of Oceanography researcher, is working on a National Science Foundation project to look for the COVID-19 virus in sea-spray droplets in coastal waters that receive regular sewage flows.
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