Because animals pee in it and animals pee is obviously blue ;D
It's because the water is deeper.
Reflects blue light, absorbs red.
Some clams appear to have blue lips but in reality, they don't. The lips appear to be blue due to the reflection of their lips in the water.
Water appears varying shades of blue depending on its depth. Deeper pools of water will appear a darker shade of blue, due to scattering of white light and selective absorption. Lesser, shallower amounts of water will appear clear due to the way the light scatters as well.
Earth is known as the blue planet because its surface is 75% water, which happens to appear blue.
There are several reasons - the first has to do with the reflection of sunlight. Blue wavelengths of light bend more easily, and are reflected off the surface of the water, thus making it appear blue. The water also reflects the color of the sky, so that on cloudy days, it seems more gray than blue. The amount of suspended matter in the water also plays a role, as does the position of the observer.
The water looks colorless when in small quantities but it has actually a very slight blue hue to it. This can be tested with a glass of water and a filled bathtub: the former will appear colorless while the latter will be faint blue.
Because it is blue
Its hard to paint water. Simpily because in small concentrations water is fairly transparent, the blue color may be inspired from the color of the sky reflecting on the waters surface. HOWEVER water truley is a blue substance, as the depth of water increases the blue-er the water becomes. This is because of the water molecules abality to absord red light and in turn reflecting blue light.
This water has a lot of rocks from the glacier suspended in the water causing it to be milky instead of clear.
blue
Simple Answer: Because the water is blue and the earth's surface is 70% water and only 30% percent land and because the clouds usually cover the land, the earth, from space does appear to be Blue and white.