https://www.vice.com/en_us/article/m7gban/rainwater-everywhere-now-considered-too-toxic-for-safe-consumption-study-finds

Atmospheric levels of toxic “forever chemicals” are so high that rainwater everywhere contains amounts that are unsafe for long-term human consumption according to safety guidelines, scientists say. 

Hazardous pollutants known as perfluoroalkyl and polyfluoroalkyl substances (PFAS), which are sometimes called “forever chemicals” because they break down so slowly over time, are present at such elevated levels in environments around the world that scientists believe the ubiquitous contamination has now exceeded a safe planetary boundary, reports a new study.