Abstract: In order to know the radioactivity level of centralized drinking water sources in prefecture-level cities (states) of Gansu Province, the total alpha, total beta, U, Th, and ²²⁶Ra radioactivity in centralized drinking water sources in prefecture-level cities (states) of Gansu Province were investigated in 2017 and 2018 respectively. The results show that the concentration of radionuclide activity in the water body of the centralized drinking water sources is at the natural background level of the local environment. And the corresponding environmental management countermeasures are put forward for the drinking water sources.

Key words: Gansu province, drinking water, water sources, radioactivity survey