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About Greywater

About Greywater

· Depending on your class size, you may need more than one bucket!

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Water is cycled on all scales. It cycles continually between the Earth’s surface and the atmosphere (known as “the water cycle”).

You can also witness the water cycle in your own neighborhood by recycling water in your home, school, and garden. Greywater is any water leftover from your daily household chores (laundry, dishes, and showering).

This water can be reused to water your garden, and gardens love greywater!

The concept of greywater teaches kids that in everyday tasks, such as washing hands, water can be reused.

Students define greywater, create it, and use it while making a snack in the garden.



· Students understand the concept of recycling water



ESS2.C: Roles of water in Earth’s surface processes

Water is found in many places and forms on Earth

2- ESS2-1: Earth’s Systems

Compare multiple solutions designed to slow or prevent wind or water from changing the shape of the land

(NGSS) ETS1.A, K-2- ETS1-1: Defining and Delimiting Engineering Problems

A situation that people want to change or create that can be approached as a problem to be solved through engineering.



· 1 bucket

· 1 piece of fruit

· 1 knife and cutting board, biodegradable hand soap

· Towel

· Water source



If there is no available fruit on the trees in the garden, have kids bring a piece of fruit in their lunches to school or bring in a bag of apples.



In this activity, students harvest and prepare a simple fruit snack in the garden, wash the fruit over a bucket, and use the water to irrigate the garden.

1. Ask the students how they use water throughout their day. Brainstorm and record a list.

2. Tell the students that they are going to wash their hands and have a snack. This time, they are going to pay attention to how much water they use by doing this all over a bucket.

3. Record the number of gallons that a full bucket holds.

4. Line up at a water source. Place a bucket under the source.

5. Have each student take turns washing their hands over the bucket.

6. Rinse the fruit over the bucket. Measure and record water level/ gallons saved.

7. Have students brainstorm ways that they could use the water better than pouring it into the drain. If they don’t think of it first, suggest using it to water the garden.

8. Choose 2 or 3 students to fill watering cans with water from the bucket.

9. Water the garden.

10. Slice and serve fruit.

11. Discuss during snack.



1. What is greywater?

2. What are some examples of greywater?

3. How can you save water in your home?

4. What can you do with your greywater at home?