yes.. so long as have water. tap water from toilet i also drink.
water is water.. If u only drink clean or bottled water, your body
will get used to it and u can't take 'harder' water. easy to get
sick and food poisoning.
not like water cooler water is recycled as ppl many think..
House tap water the piping have alot of algae inside also, free
extra vitamins n minerals. Ignorance is bliss 
i use to have the feeling that the water form the toilet bowl will
some how splash around then mix with the clean water. or somehow
the dirty pipe will contaminate the clean water:(
