The “Big Berkey” will purify even ditch water - it is a purifier, NOT a filter. Look up a Big Berkey on the web and you’ll see the black purifier filters last a very long time for four people and they can be cleaned, read the directions. The Berkey sits on the countertop - pour water in the top, and pure water comes out the bottom in the lower half (both the top and bottom sections are stainless steel. Push the lever, and you have pure water. Pitchers, like Brita and the others have filters that need to be replaced too often and they do not purify.
My son is a documentary film director and has been all over the world in most of the armpits of the world. They carry a Berkey and have never gotten sick from water in African countries or the Amazon or anywhere else in the world.
With a Big Berkey, you have the best in water purification.
How does it taste?