Marine Pollutant Shipping: IMDG Requirements for Environmentally Hazardous Cargo

Marine Pollutant Shipping Under IMDG Requirements

Substances harmful to the marine environment receive additional shipping requirements under the IMDG Code. South Florida’s coastline, coral reefs, and marine ecosystems make marine pollutant compliance especially important for businesses shipping through PortMiami and Port Everglades.

What Constitutes a Marine Pollutant

Marine pollutants are substances identified in the IMDG Code as harmful to aquatic environments based on toxicity, bioaccumulation, and biodegradation data. They include certain pesticides, heavy metal compounds, petroleum products, and synthetic chemicals that persist in marine ecosystems.

Severe Marine Pollutants

Substances meeting higher toxicity thresholds are classified as severe marine pollutants with additional packaging, stowage, and reporting requirements. Release of severe marine pollutants at sea triggers mandatory reporting to coastal state authorities.

Marine Pollutant Mark

Packages containing marine pollutants must display the marine pollutant mark—a triangle with a fish and tree symbol. This mark appears in addition to any hazard class labels and is required on outer packaging, overpacks, and freight containers carrying marine pollutant cargo.

Stowage Requirements

Marine pollutants have specific stowage requirements aboard vessels—typically requiring stowage in positions that minimize the risk of release into the sea. This may mean below-deck stowage in holds with scupper plugs or on-deck positions with containment capability.

Spill Response Plans

Vessels carrying marine pollutants must have Shipboard Marine Pollution Emergency Plans (SMPEP) addressing response to pollutant releases. Port facilities handling these materials maintain corresponding shore-side response capabilities.

South Florida Environmental Sensitivity

Shipping lanes from South Florida pass through ecologically sensitive waters including the Florida Keys National Marine Sanctuary. A freight forwarder with marine pollutant expertise ensures proper handling that protects these irreplaceable marine environments.