Abstract: An External Filtering and Absorbing Device for Use in a Local Containment Area contains filter material with a mesh size not less than 50 microns for removing contaminants from ballast or bilge water from a ship or effluent from a storm drain. Examples of contaminants removed are aquatic nonindigenous species such as Fish, Zebra and Quagga Mussels, Asiatic Clam, Aquatic Weeds, Green Crabs, or other suspended particle contaminants. Filtering is accomplished above the ambient water allowing easy visual verification and visual gratification of the efficacy of the filter unlike closed on-board systems. Water and oil permeate the filter and flow into a local containment area where oil is absorbed by absorbent pads held in pockets. The filter is easily removed and can be sent to authorities to demonstrate compliance with environmental standards. Water sampling containers or instruments used with the assembly allow for further compliance monitoring.