During a boat ride, two kids throw soda cans and food wrappers into the water. While painting and repairing a boat, people use large cloths on the ground to catch spilled paint and paint scraps. At a boat yard, people painting boats often spill paint and soap. The paint and soap wash into the water after it rains. Sewage dumped into the water from boats can pollute shellfish such as clams and oysters.
Clean boaters keep a garbage can on board their boat for trash.
The trash is emptied and recycled at the dock. People accidentally spill gasoline or fuel into the water when they are filling their boat's fuel tank to the top.