I guess so. They use non-potable water for the toilets? Granted I am not drinking it, but still the eyes is one of the organs having mucous membranes and can take in bacteria/virus into the body. But I guess not as bad as drinking it and kena really bad food poisoning lah. (always carry charcoal pills/activated charcoal, take it at the very first sign of tummy aches, no issue at all as its not even a medicine....better than antibiotics like noroflaxcin/ciproflaxin as sometimes it might be too late).