TOLEDO, Ohio (AP) — The mayor of Toledo, Ohio says tests show some toxins remain in the drinking water, and the tap water ban will continue for some 400,000 residents.

Tests from one treatment plant show higher readings for microcystin, most likely because of algae.

Drinking the water could cause vomiting, cramps and rashes. And health officials say people with weakened immune systems shouldn't bathe in it.

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