things you wish you knew about Niagara Falls

Falls Foam

What’s foam in the water below the Falls?

The foam is calcium carbonate that comes from the mist as it evaporates when it comes over the Falls. It mixes with decaying diatoms and other algae to make the foam. This is a natural occurrence.

Once the foam moves downstream it will once again mix with the water and disappear. This also occurs in the area of the Whirlpool.