Hospital use pure water treatment system as water for the cleaning and disinfection equipment of the endoscopic center, the conductivity is ≤15, the recovery rate is 70%, the desalination rate is 99%, the filter membrane aperture used in the production of purified water is ≤0.2, and the bacteria is < 10CFU/100ml, which meets the pure water quality standard of the national “WS507-2016” technical specification. Issue water quality monitoring report.