Letter Re: The Water Filter Quest
JWR, I found the recent water filter article interesting and appreciate all the time Scott spent researching water filters. I set up filters for missionaries in Third World countries and have found that plastic water containers can promote bacteria growth. I believe there are two causes: 1. The plastic scratches when cleaning and provides a place for the nasties to attach and hide on the sides of the container, and 2. The container allows sunlight to enter which also encourages some types of bacteria. Another problem with only using mechanical filtration is some viruses are physically impossible to filter …