Investigations of the phytoplankton in the various sections of the Kama reservoir. It is established that in the main waters of the reservoir leading role in the species richness of the algal flora of the diatoms belong to the algae. In coastal waters and the gulfs most diverse green algae. Compared to the Kama, Vishera is more important in the formation of algal flora of the reservoir. The number of phytoplankton is determined by the development of diatoms to the town of Dobryanka, where is located the Perm GRES. The dumping of heated water in the reservoir stimulates the development in the reservoir cyanoprokaryota. In the formation of the total biomass of phytoplankton the most important are diatoms and large representatives of some other departments.