How contaminant limits are set

Limits can be framed as feasibility-based (what supply chains and labs can reliably meet today) or safety-threshold-informed (what toxicology suggests should be targeted). Practical standards usually combine both to support measurable improvement.

Concentration-based limits matter because they provide consistent acceptance criteria across batches, suppliers, and geographies.

Sampling plans, analyte preparation, and instrument method details all influence final values and therefore compliance decisions.