What Makes a Lake Colored
Colored lakes get their hues from dissolved minerals, algae, or suspended sediments. For example, high salinity or specific salts can shift water toward turquoise or pink tones, while algae blooms often create green or red shades.
Famous Colored Lakes Around the World
Lake Hillier in Australia appears bright pink due to a combination of salt-loving algae and bacteria. Lake Natron in Tanzania turns reddish as cyanobacteria thrive in its alkaline, salty water. In Canada, the turquoise color of Peyto Lake comes from glacial rock flour suspended in meltwater.
How Colors Change Over Time
Lake color can shift with seasons, rainfall, temperature, and nutrient levels. Droughts may concentrate salts and minerals, intensifying certain hues, while heavy rains can dilute them. Scientists monitor these changes to understand water chemistry and ecosystem health.
For more background on how minerals and organisms affect water color, see the overview at https://www.britannica.com/science/lake
