While there are chemicals and minerals that are filtered out of drinking water, there are some additives that could be beneficial to your health. Some parts of the UK and the United States have added small amounts of fluoride to water to help prevent tooth decay. Some parts of the world have added activated charcoal into the water supply to help clean the water while also acting as a digestive aid. These little additives could be for the better. For the article that inspired this post, click here:: Water Treatment Additives