Tokyo to ‘screen off’ bacteria for Olympic swimming in bay

TOKYO — Tokyo Olympic organizers said Friday that a system of layered screens would be used to keep bacteria levels within “agreed limits” for triathlon and marathon swimming in heavily trafficked Tokyo Bay.

Organizers acknowledged a year ago that levels of E. Coli were up to 20 times above acceptable levels set by international sports federations, and fecal coliform bacteria were seven times over the limit.

Hidemasa Nakamura, executive director of sports and games delivery, said a triple-layer screen of polyester fiber was tested in July and August on dates corresponding to the Olympics and Paralympics in two years.

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