Technical note provides guidance on constructing a ground level storage tank. For effective water storage and water system operation, ground level storage tanks should be built for sufficient, and even excess, capacity and must be watertight to prevent leakage. This technical note discusses the basic steps to follow in constructing a ground level storage tank. The actual construction process and materials used will differ with each situation or area. The construction of all storage tanks should be supervised by experienced builders or masons and, whenever possible, engineering assistance should be sought.