A system may include a water storage tank configured to at least temporarily store an amount of water in an enclosed interior section and a mixing system. The mixing system may include an intake conduit having at least a portion positioned in the interior section to withdraw water from the lower portion of the water storage tank. A pump system may have an intake section and a discharge section, the intake section being coupled to the intake conduit. A discharge conduit may be coupled to the discharge section of the pump system. A discharge fixture may be positioned in the interior section and may include a plurality of discharge holes configured to spray water from the discharge conduit into the water storage tank so as to mix at least a portion of water inside the water storage tank.