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No, rainwater has picked up dust particles and dissolved gasses from the air, some of these are pollutants (e.g. sulfuric acid from coal burning industry, nitric acid from internal combustion engines). Rainwater is the softest water compared to sources of surface water.

The purest forms of water are distilled water and reverse osmosis water. These are so pure that before they can be used for drinking purposes small amounts of minerals must be added.

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10y ago

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