As far as I recall, nobody in Chicago-land actually drank tapwater. You had to filter the stuff before you used it to wash cars. It kills houseplants. I always

As far as I recall, nobody in Chicago-land actually drank tapwater. You had to filter the stuff before you used it to wash cars. It kills houseplants. I always assumed that it had to do with the bottled water companies keeping up on their campaign donations, more than any deficiency in the water treatment system.