Reverse osmosis (RO) water filters purify water by pressuring it through a semi-permeable membrane, reducing contaminants while allowing clean water to pass. At first, the source water undergoes pre-filtration to remove sediments and chlorine. Secondly, pressurization forces it through the reverse osmosis membrane, separating clean water from contaminants. The purified water is collected in this way. The RO filter removes salts, minerals, bacteria, and viruses, producing safe and healthy drinking water.

Reverse osmosis (RO) can effectively remove various contaminants including "forever chemicals" PFAS, dissolved salts like sodium, chloride, and fluoride, heavy metals, as well as harmful chemicals.

What's more, Waterdrop RO systems can eliminate industrial pollutants, providing you and your family with safe and clean drinking water. Common impurities like sediment and foul odors are also filtered out by our RO water filters.

Yes, countertop reverse osmosis systems do produce wastewater just like the undersink RO filters. During the reverse osmosis filtration process, only a portion of the water passing through the membrane becomes purified water and suitable for consumption. The rest water which contains the blocked contaminants, is discharged as wastewater.

RO systems can remove nearly 99% of particles and dissolved contaminants from the source water. Some people hold the opinion that the reverse osmosis system removes all the minerals from the tap water, which are beneficial for the human body. If you are worried about that, investing in a remineralization water filter can be a good choice. The remineralization filter will re-add the essential minerals back to the filtered water.

It depends on different product models. If a countertop RO system has a ratio of 1:3, it means that for every 1 gallon of filtered water, about 3 gallons of wastewater is produced. Waterdrop adopts advanced technology to help you save your water bills. The X Series RO systems have a pure-to-drain ratio of 3:1.

In 2024, EPA imposed the first national limits on forever chemicals in drinking water. Detectable levels of PFAS have been identified in human tissues and breast milk, indicating widespread exposure. High PFAS exposure is associated with adverse health effects on the endocrine system, liver, thyroid, metabolism, development, and immunotoxicity.

Exposure to PFAS primarily occurs through drinking water, food, PFAS-containing consumer products, and dust. Notably, PFAS, especially longer-chain variants like PFOA and PFOS, tend to bioaccumulate, binding to tissues and persisting for 2 to 9 years. A countertop reverse osmosis filter or an undersink RO system can filter out these chemicals from your drinking water effectively.