I will have to read the article. He may very well be correct, but my initial reaction is a big no. Water quality worldwide has suffered pollution from heavy metals, pesticides, fertilizers and bacterial "blooms". Some people scoff at mechanical filters as a marketing ploy "we strain the big stuff through our teeth with a iodine chaser grunt, grunt". I was under a doctor's care for giardia that ignored treatment for months. I boil and treat chemically AND use a mechanical filter if available.