Question

why is Mountain river water clean​

Answer 1

Answer:

Thirsty hikers may be tempted to gulp from the alpine springs, but experts say look out – the clear mountain water could be full of microscopic organisms just waiting to wreak havoc on your stomach. ... Wilderness water can contain disease-causing agents such as giardia, E.

Answer 2

Answer:

Still water gets contaminated because some of some algae develops , this is because of zero molecule motions

and the matter is totally different in stream or watering river because the molecules are dashing with movements that's why it is clean and clear from dirt and pathogens