Sample type V is composed of radiological water to be analyzed for gross beta activity. Participant laboratories analyzed samples of water analytically. Standard deviations were calculated and are presented. Results of each analysis are presented including the method used. Finally comments and the methods are presented as are summary data tables. It is hoped that the following are provided: a statistical evaluation of procedures, the opportunity for laboratories to be compared, exchange of information, evidence suggesting methods requiring further development, and a framework for broad evaluations of new analytical methods.