Objective   To know about and master the present tunnel stored water quality of our army.To present the tunnel water disinfecting effect by making use of controlling-released potable water disinfectant (CRPD) so as to offer scientific evidence to the potable water disinfection.

  Methods   Through the overall investigation on the stored tunnel water situation of some coast defense ministry and some engineering ministry, to report the changed water quality of the present stored tunnel water during the long-term stor age and the disinfecting effect of this disinfectant with the help of the water quality test report before and after using the controlling-released disinfectant.The survey was conducted according to the GB5750-85.

  Results   Large parts of the sense perception properties and physical-chemical index of the stored tunnel water basically accorded with the sanitation requirement.but the problem of microbe contamination was very serious.Controlling-released potable water disinfectant was applied to the stored tunnel water.The disinfecting results from the library and the scene showed that the disinfectant could continuously disinfect water 100 d.the surplus chlorine was maintaining 0.20-3.15 mg/L, the disinfectant could continuously disinfect of germ and the coliform bacteria was 100%.

  Conclusion   The disinfecting effect of the CPRD controlling-released potable water is good for the water-storage with stable quality long efficiency, easily being maintained, which is an appropriate and efficient way of solving the quality problem of the stored tunnel water.