LAKE TAHOE, CA — Lake Tahoe is famous for its blueness. The growth and spread of algae is one reason blue lakes around the world can go green in the summer.
Algae forms the base of many food webs, and most algae in Lake Tahoe, though sometimes unattractive, does not pose a health risk to people or animals that enjoy the Lake.
Harmful algal blooms (HABs) are a different story.