Fun Projects: Build a Water Filter

Fun Projects: Build a Water Filter

Here is a fun project that you can do at home or in the classroom.

Water Filter


  1. Put the top half of the soda bottle upside down (like a funnel) inside of the bottom half. The top half will be where you build your filter and the bottom half will hold your filtered water.
  2. Layer the filter materials inside of the top half of the bottle. Think about what each material might remove from the dirty water and in what order you should lay the materials.
  3. Pour the dirty water through the filter. What does the filtered water look like/
  4. Wipe the bottom clean and try again. Try putting materials in different layers or using different amounts of materials.


To learn part of the water cleaning process.

Materials Needed

These are the things you will need to complete this project:

  • 2 liter soda bottle cut in half (by an adult)
  • Napkins or Paper Towels
  • Gravel
  • Sand
  • Cotton Balls
  • Dirty Water (you can use dirt or food coloring)
"Providing high quality water to our current and future customers at a reasonable cost."