Last year, the World Health Organization revised its guidelines regarding the manufacture and distribution of water for pharmaceutical use, emphasising the appropriate specification and design of water purification systems. By utilising the latest purification technology and techniques, pharmaceutical companies can meet such requirements and make considerable improvements in water quality and delivery, explains Steve Mines at Purite. 
https://international-pharma.com/wp-content/uploads/2013/10/Water-Purification.pdf