Internal Backgrounds in the Water Phase of SNO+

SNO+ is a neutrinoless double-beta decay (0νββ) search experiment using 780 tonnes of tellurium-loaded liquid scintillator. The experiment is currently collecting data in the first of three planned phases, in which the detector is filled with ultrapure water. During this phase, the cleanliness of the water can be assayed using in situ measurements of 214Bi and 208Tl (daughter nuclei of 238U and 232Th, respectively). These results will both inform preparation for scintillator fill and support water phase physics analyses like the search for invisible nucleon decay modes. Preliminary results will be presented.