Rain water contains several chemicals from air pollutants.
Rain water is often considered a safe source of clean water. While it is a soft water source when compared to the water found in homes around the country and is free of the heavy metals from soil, rain water is not completely free of chemicals. When chemicals and pollutants rise into the air, the rain knocks them back down to earth. When the chemicals in the rain water increase, it becomes acid rain. Rain water around the world has chemicals from air pollution, whether the acidity levels are high or low.
Carbon Monoxide
Rain water, especially in the case of urban locations, has carbon monoxide mixed in. Carbon monoxide gets into the air by the burning of oils, wood and similar materials. The smoke rises and the carbon monoxide increases. When the rain falls, carbon monoxide in the air mixes into the water.
Lead
Rain water sometimes has lead. While lead is not used in modern homes, there are many older homes that have lead paint or other items with a lead base. When these items chip, some lead gets into the air. The rain water knocks the lead back onto the ground, and the lead gets mixed into the water.
Ozone
Ozone is created by the burning of fossil fuels like oil and gas. For humans, ozone can lead to breathing problems and asthma. Ozone typically rises into the air, but during heavy rainfall it can end up closer to the ground and mix with the water.
Hormone Disrupters
Hormone disrupters are found in rain water around the world. The chemicals that make up hormone disrupters are varied and often relate to pollution from industrial companies.
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