 Due to decisions by the San Francisco Public Utilities Commission (SFPUC), Crystal Springs Reservoir is not open to the public.A considerable biodiversity of flora and fauna exist in the vicinity of the reservoir, which is located within the California Floristic Province.Among these species are a number of rare and endangered species including "Acanthomintha duttonii" or San Mateo thornmint, "Hesperolinon congestum" (Marin Dwarf Flax) and "Eriophyllum latilobum" or San Mateo Woolly Sunflower.