UV light of wavelength 254 nm is used for reducing microbial count in water for pharmaceutical use.
Why UV light can not be relied up on as complete antimicrobial option:
Important points should be considered for UV light in water system in pharmaceutical as follows:
Validation of efficacy of online UV light sterilization in water purification plant:
Efficacy of online UV light units should be evaluated by validation, form a suitable validation master plan to evaluate their actual ability to lower microbial load in water being treated, microbial load before UV treatment and after UV treatment should be monitored and a correlation between both must establish the efficacy of UV light in online water purification units, it can be adapted as a daily / routine sampling point for ongoing validation of water purification plants.