Saltwater and a Beach

Saltwater Facts for Kids

This web page contains saltwater facts for kids and is an excellent resource for anyone of any age looking to learn about the water in our oceans. Our goal is to provide you with accurate, up to date facts about saltwater. In addition to facts about saltwater, we provide additional resources to help you with your research on the water in the oceans.

The saltwater facts below will help you learn about the composition of saltwater, how saltwater was created, how saltwater supports the water cycle and other saltwater related facts. We hope these freshwater facts are interesting and help you learn more about saltwater.

If any of the below saltwater facts are inaccurate, please contact us and let us know.


20 Saltwater Facts for Kids

  1. Saltwater, also known as seawater, is the type of water that makes up oceans and seas.
  2. A water source that has been 3% and 5% salt content is considered saltwater.
  3. The average pH range for saltwater is 7.5 and 8.4, but this can vary based on unique situations.
  4. Saltwater cannot be consumed by humans. Consumption of saltwater requires the human body to excrete more fluids than were taken in to remove the salt content.
  5. Saltwater can be treated through the desalination process to turn into safe freshwater.
  6. Habitats found in seawater are some of the most biodiverse habitats on our planet.
  7. Some estimates claim over 50% of all living species live in seawater.
  8. Water covers around 71% of the Earth’s surface, most of that water is saltwater.
  9. The five major oceans account for 96.5% of all the saltwater on the planet Earth.
  10. The Pacific Ocean contains 49.6% of all the saltwater on our planet.
  11. The Atlantic Ocean contains 23% of all the saltwater on our planet.
  12. The Indian Ocean contains 19.5% of all the saltwater on our planet.
  13. The Southern Ocean contains 5.31% of all the saltwater on our planet.
  14. The Arctic Ocean contains 1.39% of all the saltwater on our planet.
  15. A water source that has more than 5% salt content is considered brine water.
  16. An example of a water source that is considered brine water is the Dead Sea in the Middle East, Asia.
  17. A water source that has a salt content between 0.05 and 3% is considered brackish water.
  18. An example of a water source that is considered brackish water is the Caspian Sea in Eurasia.
  19. A water source with less than 0.05% salt content is considered freshwater.
  20. An example of a water source that is considered fresh water is Lake Michigan in the Midwest of the USA.

Additional Resources on Saltwater