Regulatory Limits for Contaminants in Food

In Singapore, food contaminants—also called incidental constituents—are substances that can be present during production, manufacture, treatment, packing, packaging, transport or holding, or because of environmental contamination. They are different from food additives, which are intentionally used for a technological purpose (SFA, Regulatory Limits for Contaminants in Food, last updated 28 October 2025, accessed 30 August 2026).

What limits apply

SFA publishes six limit categories: microbiological standards; heavy metals; mycotoxins and marine biotoxins; veterinary drug residues; pesticide residues; and other incidental constituents. The applicable value depends on the contaminant and food category; there is no single universal contaminant threshold. For pesticide residues, Singapore's specified regulatory limits apply, and Codex maximum residue limits may be relevant where the Food Regulations do not specify a limit (SFA, Regulatory Limits for Contaminants in Food, last updated 28 October 2025, accessed 30 August 2026).

Who must comply

All food businesses must comply with the regulatory limits for incidental constituents. The contaminant rules operate alongside, rather than instead of, the separate requirements for food additives and other food-safety controls (SFA, Regulatory Limits for Contaminants in Food, last updated 28 October 2025, accessed 30 August 2026).

Compliance workflow

Food businesses should first identify contaminants commonly associated with their products and conduct laboratory testing as needed. Suppliers may already hold relevant test information; businesses can also send samples to a laboratory and consult SFA's Laboratory Recognition Programme list (SFA, Regulatory Limits for Contaminants in Food, last updated 28 October 2025, accessed 30 August 2026).

They should then compare any detected contaminant with the specified limit for the relevant food and contaminant. Food or food products exceeding a regulatory limit must not be imported or sold; the operational rule is that businesses must not import or sell such a product. If a result exceeds the limit, do not import or sell the product (SFA, Regulatory Limits for Contaminants in Food, last updated 28 October 2025, accessed 30 August 2026). The SFA documents are the starting point for the applicable limit; a general article should not substitute a product-specific regulatory or laboratory assessment.