Singapore legislation
Schedule 2
of Food Safety and Security (Non-Packaged Drinking Water) Regulations 2025
Schedule 2
Methodology and assessment for quality of drinking water
SECOND SCHEDULERegulation 5Methodology and assessment for quality of drinking water
1. Calculate the guideline value for the contaminant, substance or organism based on a methodology, assessment or approach used for derivation of guideline value, available under the most recent edition of the Guidelines for Drinking‑water Quality, published by the World Health Organization (WHO).
2. The data used for derivation of guideline value must be based on uncertainty factors, relative source allocation for drinking water, default assumptions or any other data used by the WHO in the stated Guidelines, or published in the most recent edition of the background document for development of WHO Guidelines for Drinking‑water Quality for any contaminant, substance or organism.
3. Compare the guideline value calculated above with the level or concentration of the contaminant, substance or organism found in the drinking water supplied by a drinking water producer providing a drinking water service.
4. The drinking water is wholesome if the level or concentration of the contaminant, substance or organism in drinking water does not exceed the calculated guideline value.