Such water is not so good to drink, or for use in cooking, as soft water.
That water is best which holds no substances in solution.

Well-water sometimes contains substances which soak into wells from vaults or cesspools.

Slops which are poured upon the ground soak down out of sight; but the foul substances which they contain are not destroyed.
They remain in the soil, and when the rains come, they are washed down into the well if it is near by.

You can see some of the things found in bad water in the illustration given on opposite page.
~6.~ It is best not to drink iced water when the body is heated, or during meals.

If it is necessary to drink very cold water, the bad effects may be avoided by sipping it very slowly.
~7.