The Valencia City Water District Water Testing Lasboratory is accredited by the Department of Health (DOH) with accreditation number 10-011-2022-LW-1, conducting water testing and monitoring to confirm compliance with the Philippine National Standards for Drinking Water (PNSDW).

The laboratory was established to ensure safe supply of drinking water to all concessionaires of Valencia City Water District. It offers Heterotrophic Plate Count (HPC) and Multiple Tube Fermentation Technique (MTFT).