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Dual Flush Toilets in Edison- Water Conservation by an Edison 7th Grader

On February 19, 2022, I sent this email to the Mayor of my town, Sam Joshi:
 
Hello Mr. Joshi,
In school, I notice a lot of water wastage, and the majority of it happens from the school toilets. Why is this something that should concern my generation? According to UNICEF by 2040, roughly 1 in 4 children worldwide will be living in areas of extremely high-water stress. I will only be 32 years old by then. America itself is not immune to this water crisis. As per National Geographic within 50 years, half of the American freshwater basins will be unable to meet the consumer demand creating serious water shortages for Americans. Yet even today the average American uses around 156 gallons of water per day while In India it is 36 gallons and only 3 gallons in Mali.
 
It is time for us to view water as a precious commodity before we use the last drop. Perhaps the simplest solution is to use less water.
So, I propose that we replace the standard toilet flushes with the Dual flush toilets in our school district. The American standard toilet uses 1.6 gallons of water per flush. The Dual flush toilets manage solid and liquid waste in two different ways: It allows the user to make a decision between how much water will be used to flush the waste. The user makes this choice based on the type of waste, using two different buttons. Liquid waste can be flushed with .8 gallons of water while solid waste can be flushed with 1.6 gallons of water. The Dual flush is a smarter toilet that conserves water.
 

Let us see how the math will work out in the girl’s toilet in an Edison school. An average human flushes the toilet 5 times every day. For this example, let us assume 1 time is for solid waste, and 4 times are for liquid waste. That means around 8 gallons of water are flushed by one single student per day, and 1440 gallons are flushed in the 180 instructional days per year per student. However, with the dual flush option, when we use the half flush (which is more convenient for liquid waste), we flush 0.8 gallons per use. This means 4.8 gallons are flushed by one single student per day, and approximately 864 gallons are flushed in the 180 instructional days per year per student. Thereby saving approximately 576 gallons every year (but of course, the number of times the half flush and the full flush is used by a person will vary). This small change alone gives us 40% savings on average!

This letter isn’t intended just for my school, but also all other schools in the Edison district. In addition to schools, we should encourage existing and new residential and commercial buildings to use dual flush fixtures during replacements of faulty fixtures by giving efficiency tax breaks. We can see a huge change when we save water in Edison schools, residential, and commercial buildings total. I’ll look at my household as an example. We’re a family of 4, and we have the standard toilets. Let’s keep the assumption that 1 flush is for solid waste, and 4 flushes are for liquid waste. When the calculations are completed, you’ll come to the fact that 11680 gallons are being flushed every year with a standard toilet. But with a dual flush, only 7008 gallons are flushed.

This gives us 40% savings every year! In commercial buildings, this can exponentially scale up.

For new builders, this should be mandated as their building code. Several people go in and out from the public restrooms of commercial buildings, so we’d be saving a lot more water when only dual flush toilets are used. Dual flush is universally adopted in Australia, Singapore, New Zealand, Israel, and many other countries including India. It is time for America to save water one flush at a time. I would love to hear from you on what are your plans for Edison, and how I can help you achieve some of these while learning in your guidance.

Sincerely,
Rhea Rawat, Grade 7
John Adams Middle School, Edison, NJ

Note : Blog originally posted on WIX : Mar 20, 2021