In general, it is safe to drink sparkling water every day. However, a recent study showed that some sparkling water brands had detectable levels of certain chemicals classified as PFAS (polyfluoroalkyl substances). These chemicals are produced by humans during manufacturing in various industries. They are sometimes referred to as "forever chemicals" because they take a very long time to break down in the environment and in the human body. PFAS are important because some research links them to health issues, like high cholesterol, infant birth weight, and certain cancers. No current official safe-consumption standards exist for PFAS chemicals. However, the United States Environmental Protection Agency has voluntary guidelines set for two types of PFAS, considered to be the most harmful to human health, at 70 parts per trillion (ppt). None of the sparkling water brands recommended in this list were tested at over 1 ppt. And rest assured, the sparkling water with the highest levels of PFAS still had less than 10 ppt. Overall, we need more research to determine the effects of PFAS on human health and to form more formal consumption guidelines and regulations.