From Your John to the School Lawn: Is Recycled Water Really Safe? *
|Areas of Science||
|Time Required||Average (6-10 days)|
|Material Availability||Readily available|
|Cost||Average ($50 - $100)|
*Note: This is an abbreviated Project Idea, without notes to start your background research, a specific list of materials, or a procedure for how to do the experiment. You can identify abbreviated Project Ideas by the asterisk at the end of the title. If you want a Project Idea with full instructions, please pick one without an asterisk.
AbstractReclaimed (treated) wastewater can be used for many purposes, including landscape watering and freeing up valuable fresh water for other purposes (like drinking water). It's a great way to conserve water, but is it really safe? This science fair project is designed to find out.
ObjectiveThe objective of this science fair project is to investigate if watering with recycled water affects the safety of school lawns.
Theresa J. Hannig
Cite This PageGeneral citation information is provided here. Be sure to check the formatting, including capitalization, for the method you are using and update your citation, as needed.
Science Buddies Staff. "From Your John to the School Lawn: Is Recycled Water Really Safe?" Science Buddies, 28 July 2017, https://www.sciencebuddies.org/science-fair-projects/project-ideas/EnvEng_p002/environmental-engineering/greywater-for-plants. Accessed 22 Sep. 2019.
Science Buddies Staff. (2017, July 28). From Your John to the School Lawn: Is Recycled Water Really Safe? Retrieved from https://www.sciencebuddies.org/science-fair-projects/project-ideas/EnvEng_p002/environmental-engineering/greywater-for-plants
Last edit date: 2017-07-28
Experimental ProcedureBefore starting this science fair project, you'll need to read about, water quality, water testing, growing grass, and how water is recycled. Once you're familiar with these topics, start your science fair project by growing three patches of lawn in three separate miniature greenhouses. You'll have to decide how to create your greenhouses; one way is to make them out of plastic boxes, chicken wire, and clear plastic trash bags. Water one lawn patch with recycled water, one with distilled water, and the third with tap water. Measure the growth rates of each grass patch and compare their general appearances. Read the guide on Measuring Plant Growth for more ideas on how to evaluate the three lawns. Collect water runoff samples, and using one or more water quality testing kits, test each for pathogens, nutrients, and other characteristics. Water-quality testing kits can be purchased from a variety of science supply stores. See the Approved Supplier Program page for a list of potential vendors.
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