Water's appearance depends on its volume. Small quantities appear colorless, while larger bodies, like oceans, exhibit a blue hue due to the absorption of red light and scattering of blue light.

The Pump Room in Blue Prince controls the water flow around the house. Here’s how to use the Pump Room and raise or drain water sources in Blue Prince.

This side-by-side composite image shows how Galveston's water can fluctuate from bright blue to a murky brown or green color. The left photo is from Friday, June 3, while the right is from 2019.

It matters because blue water is usually clearer, easier-to-use water, O'Reilly said. "It's much more complicated for us to use water that's got algae in it," she said.

Over the past few weeks the ocean water at South Carolina's Grand Strand strip are strikingly clear and blue. Meteorologist Bob Larson explains why.