This manual describes water purification, storage, and distribution equipment and its use by TOE units in their GS and DS roles. It also deals with water supply point operations. It includes information on quality control; ground and air reconnaissance; development of a water supply point; NBC and extreme environment operations; and purification, storage, and distribution operations. The appendixes provide additional detailed information on related subjects. Appendix A provides commonly used formulas. Appendix B provides a chart for computing chlorine residual percentages. Appendixes C, D, and E provide characteristics of major water purification, storage, and distribution equipment.