Ocean Facts

When large tracts of land are plowed, the exposed soil can erode during rainstorms. Much of this runoff flows to the sea, carrying with it agricultural fertilizers and pesticides.

What is the biggest source ocean pollution?

Eighty percent of pollution to the marine environment comes from the land. One of the biggest sources is nonpoint source pollution, which occurs as a result of runoff. Nonpoint source pollution includes small sources, like septic tanks, cars, and trucks, plus larger sources, such as farms, ranches, and forest areas. Millions of motor vehicle engines drop small amounts of oil each day onto roads and parking lots. Much of this, too, makes its way to the sea. Read more

What's New

National Ocean Service Mission: In the U.S., where over half of us live along the coast and more than 78 percent of our overseas trade by volume comes and goes along our marine highways, the health of our coasts is intricately connected to the health of our nation's economy. The National Ocean Service (NOS) translates science, tools, and services into action, to address threats to coastal areas such as climate change, population growth, port congestion, and contaminants in the environment, all working towards healthy coasts and healthy economies. About NOS