Actually, coliform bacteria is helpful... It helps break down your crap...

I always think it's funny when people freak out about e. coli ... E. coli is relatively harmless. Your colon is full of the little buggers and I can't imagine any level of coliform that could actually harm you if digested.

HOWEVER, they live in your colon... So in the morning your toilet ends up with a bunch of them, if you catch my drift. Soooo, when you find a lot of coliform in your water/food, it means there's a lot of poop in there, too.