An RO (Reverse Osmosis) water purifier helps remove dissolved salts, chemicals, heavy metals and other impurities from drinking water. However, while purifying water, it also produces wastewater, which can lead to considerable water wastage.
1. What Is an RO Water Purifier?
RO stands for Reverse Osmosis. It is a water purification technology that uses a special semi-permeable membrane to remove dissolved impurities, salts and other unwanted substances from water. It makes water safer for drinking when properly maintained.
2. How Much Water Does an RO System Waste?
A conventional domestic RO purifier may waste around 1–3 litres of water for every 1 litre of purified water. The exact amount depends on the purifier’s technology and incoming water quality.
3. Water Wastage While Producing 10 Litres
If an RO purifier wastes 2–3 litres of water for every litre of purified water, producing 10 litres of drinking water can result in approximately 20–30 litres of wastewater.
4. Why Does an RO System Waste Water?
During purification, water passes through a special membrane that separates impurities from clean water. The rejected impurities flow out along with some water through a separate outlet. This wastewater is commonly called reject water.
5. How Does Water Quality Affect Wastage?
Water containing high levels of dissolved salts, hardness and other impurities may require more water to flush away the rejected substances. As a result, RO systems may waste more water when the incoming water quality is poor.
6. How Does RO Water Wastage Affect the Environment?
Excessive water wastage puts additional pressure on freshwater resources. In areas already facing water shortages, unnecessary wastage can make water conservation more challenging. It also increases household water consumption.
7. How Can You Reduce RO Water Wastage?
- Choose an RO purifier with a higher water recovery rate.
- Collect rejected water in a separate container.
- Reuse it for floor cleaning and toilet flushing.
- Use it for washing vehicles.
- Use it for gardening only if its salt content is suitable for plants.
- Maintain and service the RO purifier regularly.
Important Fact: RO wastewater is not necessarily useless. Although it is generally not recommended for drinking, it can be reused for certain household activities depending on its quality.
Remember: Saving water starts with small daily habits. Choosing an efficient RO purifier and reusing its wastewater can help reduce unnecessary water wastage.
