Reverse osmosis (RO) systems purify water by forcing it through a semipermeable membrane, leaving behind impurities. This process inherently produces wastewater, as the rejected contaminants must be flushed away. The volume of this wastewater varies depending on factors like water pressure, membrane quality, and the system’s age. A typical ratio is 3 to 4 gallons of wastewater produced for every gallon of purified water, although newer systems can achieve more efficient ratios closer to 1:1 or even better with improved technology.
Understanding the water usage of RO systems is crucial for both environmental and economic reasons. Minimizing wastewater reduces the strain on water resources and lowers utility bills. The efficiency of RO systems has improved significantly over time, driven by consumer demand and technological advancements. This progress translates to less water waste and a more sustainable approach to water purification. Examining the amount of water rejected by these systems also provides valuable insights into their overall effectiveness and maintenance needs.