According to data of Lam Dong Department of Science - Technology, Xuan Huong lake has a surface area of about 32ha, the perimeter over 5,5 km. In the pass time, the problem of water pollution and algal phenomenon develop strongly, known as algal blooms, has appeared in Xuan Huong lake.

Local authorities and professional agencies have attempted to "rescue" Xuan Huong lake from pollution, with a series of topics such as "Water Pollution Investigation in Xuan Huong lake, the proposed solution overcome" to be implemented by Institute for Nuclear Research. "Algal phenomenon flowers in water area of Da Lat city. It impacts on water quality and treatment measures" of Da Lat university and etc. At the same time, apply situation treatment measures, such as collecting dead algae on the surface of the lake. Dredging of sediment lakes. Put fishes into the lake. Plant lotus and water lilies to limit pollution, but it is no visible result.

Xuan Huong lake was recognized as a historical culture monument in 1988. This is the first landscape in Lam Dong ranked national landscape.