Water and sewer bills are increasing all over the US, and a significant portion of household water is used in flushing toilets. Toilets use more indoor water, making up about 30% of total water use in a typical household. As discussions on water use and utility bills grow louder, one practical question arises: how much does it actually cost to flush a toilet? The cost depends on the type of toilet you have and local water rates. This blog highlights the cost of flushing toilets and the ways to calculate it.
How to Estimate Your Total Flushing Cost?
1. Frequency of Flushing: First, you need to figure out how many times you flush each day. Most adults flush about 5 to 7 times daily.
2. Check Your Toilet’s Water Use: Older toilets can use 3.5 to 7 gallons per flush. But newer, efficient models usually use around 1.28 to 1.6 gallons.
3. Calculate Your Daily Water Use: Multiply the number of flushes by the gallons used per flush and then multiply that by the number of people in your home.
4. Find Out the Water Price Per Gallon: Look at your water bill and local rates. The average cost is approximately $0.004 per gallon in the US.
5. Do the Final Calculation: Total gallons used for flushing× cost per gallon= your monthly flushing cost.
Example:
A family of five, using a 3.5-gallon toilet and flushing 6 times a day, will use:
5 people × 6 flushes × 3.5 gallons = 105 gallons per day.
At $0.004 per gallon, that's roughly 33 cents a day or almost $10 a month just for flushing.
High Water Consumption Means Higher Water Bills
Water Management is still hard in many states across the country. A 2014 General Accounting Office report states that 40 out of 50 state water managers stated that a few states could face water shortages in the coming years. Recent reports show that water bills are increasing day by day. On average, US households will pay around $104 per month this year, which is higher than before. Since 2012, water bills have increased by about 31%. The EPA also states that if every toilet in the country were replaced with water-saving models, the US could have saved around 520 billion gallons of water.
Cost Comparison for Different Family Sizes
Assuming a water cost of $0.004 per gallon:
| Household Size | Avg Flushes Per Day | Gallons Per Flush | Monthly Gallons Used | Approximate Monthly Cost |
| 1 person | 6 | 3.5 | 630 | 2.52 |
| 4 people | 6×4 | 3.5 | 2520 | 10.08 |
| 6 people | 6×6 | 3.5 | 3780 | 15.12 |
| 4 people (efficient toilet) | 6×4 | 1.28 | 921 | 3.68 |
Ways to Save Flushing Water for a Low Water Bill
There are several easy ways to save a significant amount of water every time you flush:
Switch to a WaterSense Toilet
A toilet with WaterSense uses much less water per flush than older toilets. New models use about 1.28 gallons per flush, whereas the old ones use up to 6 gallons per flush. By switching to a WaterSense toilet, you can save up to $110 a year on your water bill.
Installing a Dual Flush Toilet
You can also switch to a dual flush toilet to reduce the amount of water use. It has a smaller flush for liquid waste, which uses much less water. Using this option regularly can cut your toilet water use by up to 67% as compared to a normal single-flush toilet.
Upgrade Your Flushing System
If buying a new toilet is too expensive, you can upgrade the old one. You can use a tank displacement bag, which reduces the amount of water the tank uses. These small bags cost less than $10 on various online platforms and help save water without replacing the toilet.
Additional Tips
Switching to fancy modern toilets isn't the complete solution for managing water waste. There are other simple steps that you must take to reduce the overuse of water in flushing and reduce your water bills.
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Fix Leaks Fast: Even a small leak can waste a huge amount of water every month.
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Don't Throw Trash in the Toilet: Extra flush for tissues or other waste causes unnecessary use of water.
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Flush Only When Needed: Avoid double-flushing or flushing for tiny messes.
Conclusion
Flushing toilets use a lot of water and add to your bill. Small changes like fixing leaks, not flushing trash, or using water-saving toilets can make a big difference. Being careful with each flush and switching to WaterSense and dual flush toilets can help you save money and also prevent a lot of water wastage.
