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These limits are typically expressed asMaximum Limits (ML)orAction Levelsin milligrams per kilogram (mg/kg), which is equivalent to parts per million (ppm).
Common Heavy Metal Limits for Seafood (Crustaceans/Shrimp)
Regulatory standards vary slightly by jurisdiction but generally fall within the following ranges for the edible portion of the product:
| Heavy Metal | Codex / International Limit | European Union (EU) | U.S. FDA (Action Level) |
|---|---|---|---|
| Lead (Pb) | 0.5 mg/kg | 1.0 mg/kg | No specific ML for shrimp* |
| Cadmium (Cd) | 0.5 mg/kg | 0.5 mg/kg | No specific ML for shrimp* |
| Mercury (Hg) | 0.5 mg/kg (Methylmercury) | 0.5 mg/kg (Total Hg) | 1.0 mg/kg (Methylmercury) |
| Arsenic (As) | 0.1 - 0.5 mg/kg (Inorganic) | 10.0 mg/kg (Total) | N/A |
*While the U.S. FDA does not have a general numerical limit for lead and cadmium in all seafood, it uses action levels to remove adulterated products from the market.
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