Philippine Drinking Water Standards.

These Philippine National Standards for Drinking Water 1993 (PNSDW 1993) are designed to guide the Waterworks Officials, Developers and Operators of Water Supply Systems both Government and Private entities, health and sanitation authorities and the general public and all other concerned.
The Standards cover requirements for the acceptable values of the determined parameters in measuring water quality. These parameters include microbiological, physical, chemical and radiological compositions of the water. The Standard also delineates values established in conforming with the medical and health implication of the parameters as opposed to values established purely to satisfy aesthetic requirements.