Appropriate drinking water and its contamination can not be defined using the naked eye. Scientists use high power microscopes and perform other tests to declare any water safe or unsafe. A couple of centuries ago, spring water was considered as the safest and healthiest kind of natural water resource but with time it has now changed too. this is primarily because of industrial waste getting drained in open areas or smaller streams which ultimately joins springs, contaminating all water. Several households are acquiring that should purify their own drinking water. Generally, a steripen freedom is used to assure that water is secure for human consumption and usage.