Water Filter: The Effect of Material of Water Filtration

Student: Ethan Wang
Table: 108
Experimentation location: Home
Regulated Research (Form 1c): No
Project continuation (Form 7): No

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The purpose of this project is to determine how well different materials can filter out contaminants in tap water. In early planning, it was thought that the rocks would filter out the contaminants the water best. 200 mL of water would be mixed in with 5mL of dirt for each replicate in each trial. 2 inches of each material, the rocks, sand, charcoal, and leaves, would be used in the filter, the soda bottle, every time. The water filtration would be measured in Parts per Million (ppm), a measurement of turbidity. The filtered water would be suspended over a 200 mL jar, and a Turbidimeter would measure the turbidity. The hypothesis was accepted because therocks did filter water the best, having the least average turbidity of 105 ppm. If this experiment were to be repeated, the way of measuring the amount of dirt mixed into water would have to be improved. Also, there was no guarantee that the filtration materials measured toexactly 2 inches.


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Research Plan:

The Effect of Material on Water Filtration 

Question: Do the type of materials use effect water filtration?

Hypothesis: If rocks, sand, leaves, and charcoal are used in a water filter, rocks will filter contaminants out the best.

Materials: Soda Bottle 2 liters, Rocks, Sand, Charcoal, Leaves, tap water, coffee filters, turbidimeter, jar 300 mL, soil


1.Cut a plastic 2L soda bottle in half.

2.Use the open end, where the cap can be used to be a funnel.

3.Prepare dirty water by mixing five milliliters of soil with two liters of tap water.

4. Line funnel with coffee filter.

5. Fill funnel with up to two inches of leaves.

6. Suspend funnel over a Mason jar.

7. Pour 200 mL of dirty water into the prepared funnel and collect in the Mason jar below.

8. Measure total dissolved solids and record data

9. Remove materials from funnel and clean funnel.

10. Repeat steps 4-9 four more times.

11. Repeat steps 4-10 using activated charcoal.

12. Repeat steps 4-10 using rocks
13. repeat steps 4-10 using sand.

Data Analysis: Turbidity will be measured with Turbidimeter after the 200 mL of water has been poured into a cup. Do three trials and five replicates.

Risk Analysis: Proper handling of contaminants should be observed at all times.

Works cited: Blake, Mychelle. “Earth Sciences and Projects.” LoveToKnow, LoveToKnow Corp, science.lovetoknow.com/earth-sciences. October 2

“Common Hidden Contaminants.” Water Quality Association, www.wqa.org/learn-about-water/common-contaminants.  October 2

Gilden, Jeff, and Gia. “What's Healtier - Bottled Mineral, Filtered or Tap Water? Is Filtered Water Healthier?” USA, 14 June 2019, tappwater.co/us/healthier-bottled-filtered-or-tap-water/.  October 2

“How to Make a Homemade Water Filter.” Water Filter Answers, waterfilteranswers.com/homemade-water-filter/. October 2

“Water Filtration.” Childrens Science Center, childsci.org/water-filtration/.  October 2

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