Rainwater
Rainwater is the precipitation portion of the water cycle. Rainwater rainwater contains pollutants and other toxins along with dirt / soil, plant parts,
insect parts, bacteria, algae, and sometimes radioactive materials that the rain/snow has washed out of the air. These items attach themselves to the water as it falls to the ground.
Typically, rainwater will not make you ill if you drink it, that depends on where you are and other factors. For some, rainwater is the only source of water. Most cities and municipalities' water originates as rainwater, it is then filtered before going into the water system that is delivered to your home.