Purest water in the world

 It is difficult to give a definitive answer to the question of what is the purest water in the world. This is because there are many definitions of 'pure water'.

However, here are some of the sources of pure water that are generally considered to be:

Rainwater: Rainwater is usually the purest source of water in nature. However, due to atmospheric pollution, chemicals are often mixed in rainwater. Therefore, not all rainwater is pure.

Water in glaciers and ice caps: A large part of the fresh water on Earth is found in glaciers and ice caps. This water is very pure. The water in the glaciers of Antarctica and the Arctic is an example of this.

Groundwater: Water that seeps through rocks and soil and then seeps down is naturally purified. This water found in wells and springs is often very pure.

 Lakes: The water in Lake Baikal in Russia, one of the world's largest freshwater lakes, is considered to be very pure. It is also the deepest lake in the world.

Zamzam Water: According to religious belief, the water from the Zamzam Well in Mecca, Saudi Arabia, is considered to be the purest water in the world. It is believed to have nutritional and healing properties.

In short, natural water sources that are free from chemicals or other impurities are considered to be the purest. However, many water sources are becoming polluted due to air pollution and other man-made waste.