Hi,
I was wondering if anyone on this forum knows where to purchase sodium bentonite in Massachusetts? I have a 1/4 acre pond that has berms on 2 sides. The guy who dug it out built the berms up on fallen logs and now I have a leak in the worst possible spot. Hoping to get the bentonite to seal the leak. Thanks!

You might contact all the different water well drillers in your area. Sometimes a driller will keep some on hand for drilling wells. If not, they may know a supplier for that part of the country. You can also google up Drilling Fluid Companies in Maine and see what if any pops up. I am not aware of any in that area but it will be available in Pennsylvania, that is the closet place for that type of company that I know of.

Wendy, unless the pond is totally empty, bentonite seldom has a chance to work. It needs to be tilled into the soil.

Around here, some of the feed stores carry it.