Since the rains started every river,pond or the open water sources started to change in their colour as well as conditions. Dark brown,muddy colour or what we can say its Tea without tea powder,milk and sugar and unboiled. So how it impacts on health? Water consumed in impure format creates hazardous effects on human body. Thats why Ayurveda says collect the water in pure germ free utensils, after the first rain. Use more of boiled water to drink.