Section 903. Wastewater Disposal System. —

1. Sanitary sewage from buildings and neutralized or pre-treated industrial wastewater shall be discharged directly into the nearest street sanitary sewer main of existing municipal or city sanitary sewerage system in accordance with the criteria set by the Code on Sanitation and the National Pollution Control Commission.

2. All buildings located in areas where there are no available sanitary sewerage system shall dispose their sewage "Imhoff" or septic tank and subsurface absorption filed.

3. Sanitary and industrial plumbing installations inside buildings and premises shall conform to the provisions of the National Plumbing Code.