Clear Lake, one of California’s oldest and most-visited lakes, is not so clear anymore after an algal bloom turned the water cloudy and green. Images from NASA underscore the dramatic change in water ...

The water quality of Clear Lake — California’s largest natural freshwater lake — suffers from low-to-no-oxygen conditions that contribute to harmful algal blooms (HABs) and other issues, according to ...

Clear Lake remains in crisis, but there is new reason for hope. Once a jewel of Northern California, this ancient lake has been choking on past pollution and toxic blooms for decades. Thanks to new ...