Algal bloom is a periodic occurrence in Laguna de Bay, particularly in the Central Bay and West Bay, where Muntinlupa City is one of the lakeshore LGU's. Algae are microscopic plants in various forms, shapes and colors. Those commonly found in Laguna de Bay are blue-green algae, green algae and diatoms.

Advisory on algal bloom in Laguna de Bay. (2019, June 14). The Philippine Star, p. 2.