By nature, water is known to be pure as it is composed of strongly bonded atoms of hydrogen and oxygen. However, the water supply across the globe has to share space with other things such as organic materials, minerals, chemicals and manmade pollutants. This brings about an undrinkable solution, since it can contain deadly bacteria and viruses, among other disease-causing agents. Luckily, mankind was able to develop different water treatment methods to allow our water supply to be safe to drink. While there are some methods that are not effective on a larger scale, all of them make untreated water potable for human consumption.