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Re-Use the Waste Water from RO Water Purifiers

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Most of our homes use RO water purifiers, but do you actually know the effects of using RO water purifiers? RO water purifier is extremely reliable and provides the best water purification. However, it also leads to unnecessary wastage of water. There are many ways that you can re-use the wastewater from RO water purifier. Let’s Dive deep and know more....

What does RO Purifier generate waste water?

RO  (Reverse Osmosis) Purifier is a machine that purifies the impurities of drinking water plants by a pressured filtration system. It passes the water through a RO membrane to remove all the dirt particles which are not visible to the naked eye. RO membrane blocks impurities based on the size and shape of the particles. Larger particles cannot passed through a RO membrane. This impurity is removed in the form of wastewater through a separate channel outlet than the pure water channel outlet.

Why Reuse RO Waste Water?

As much as 75 percent of the water in today’s world is polluted and has impure particles. RO wastewater is definitely not fit for drinking but as it is removed from the purifier in huge quantities, it cannot be wasted. Hence, re-using wastewater is important and wise step.

Some Best Ways To Reuse RO Waste Water?

The easiest way to store RO waste water is to drop the RO reject pipe in a bucket. But if your RO usage is high, then there might be a big pipe needed. You can extend the RO waste pipe and drop it in a big tank. This stored water can later be re-used in one of the several ways listed below. Let’s have a look at 6 ways to reuse wastewater from RO water purifiers:

1. Wash Your Car
If you have a car and you use RO purifier at your home, car washing is one of the best ways to utilize the wastewater generated by your RO plant. A single car wash requires a lot of water and there couldn’t be a better usage of wastewater than this.

2. Watering Your Plants or Home Garden
If you are someone who loves gardening or has some plants, wastewater can be used for watering your plants to keep your indoor or terrace garden green. This tip is particularly useful for people living in urban areas as the TDS level in municipal water tends to be lower and RO waste water has very low level of chlorine residue due to activated carbon treatment and is good for plants.

For the safety of your plants, try the usage for a couple of days and observe how your plants react to the RO wastewater and you can use it effectively depending on their growth. You can also mix some tap water to dilute the impurities of RO wastewater.

3. Wash Your Utensils
Another activity that needs to be performed daily. RO wastewater mixed with some tap water can be used for washing utensils. It keeps them clean and does not wastewater. You can purchase a small and handy waste water tank which can be mounted near the sink for washing utensils. The link for purchasing the tank is given below:


4. Floor Mopping
Using the RO wastewater for mopping the floor is easy and will definitely save tens of liters of clean water every day. If you have a bigger house then the savings could be in hundreds of liters every single day.

5. Cleaning and Flushing Your Toilets
RO wastewater can be used effectively to reduce this wastage of clean water by using it to flush your toilets. When you start, always monitor your toilet seats for any salt deposit on porcelain surfaces after a few days. With a periodical cleanup using common toilet cleaners, the chances of  salt deposits can be avoided.

6. Pre-Rinsing Laundry
Low TDS RO waste water (<300 ppm) can be used for pre-rinsing laundry as well but make sure that delicate fabrics are not washed as the impurities of the water might lead to the damage of fabric.


As we live in a time where pollution is everywhere, it’s important to be careful with our health, especially with the food we consume and the water we drink. To help us be healthy, scientists invented RO water purifier. It works well and removes the impurities present in the water and provides us with safe and clean water. However, a large amount of the impurities are removed as wastewater. Instead of just throwing the waste water, it can be used in various things such as cleaning utensils, laundry, and flushing toilets.
Remember, waste is only a waste if we waste it!

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