They may be absorbed by mussels, worms, etc. and passed up the food chain to fish, birds and humans, posing health risks.
Heavy metals accumulate in marina sediments.
Contaminated sediments are more expensive to dispose after dredging, because they must be treated as hazardous wastes. This raises costs for marinas and their tenants. Disposal costs for leftover paints and solvents are high, because they are hazardous wastes. They may also release air pollutants during application. Making a Choice Boaters can help underwater hull cleaners, marinas and boatyards control costs, promote a healthy boating environment and encourage abundant marine life by considering environmental factors when selecting an antifouling strategy.