1 ppb has seemed small to me and Ive just done the maths.
In one million litres or one megalitre, which is roughly an olympic sized swimming pool (50m x 15m x 1.3m) there would be one millilitre.
No wonder it would be safe to drink, at 1ppb and drinking 2 litres of contaminated water a day it would take 1,369 years to consume one millilitre.
1 ppb has seemed small to me and Ive just done the maths.In one...
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