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PFAS (Per- and Polyfluoroalkyl Substances) are artificial chemicals formed by fluorine and carbon, a strong bond. PFAS are stable when in water and are difficult to break. According to ATSDR (Agency for Toxic Substances and Disease Registry), PFAS can stay in the body for more than four years.
PFAS were made in 1940 as oil, water, stains, grease, and fire repellants. There are roughly five thousand kinds of PFAS, but PFOA (Perfluorooctanoic Acid) and PFOS (Perfluorooctane Sulfonate) are widely studied and most common in the United States. Though manufacturers ceased to produce these chemicals in 2000, they are still prevalent in the…

Reverse osmosis takes away contaminants from impure water with the help of a semipermeable barrier. Water will flow from a more concentrated area to a less concentrated area to supply clean water through osmosis.
A semipermeable barrier is composed of tiny pores that barricade contaminants yet still allowing water to pass through. In reverse osmosis, contaminants cannot enter the less concentrated part of the semipermeable membrane.
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