The WHO guideline for ...

The WHO guideline for drinking water quality permissible limits had been issued for many reasons:

•Background and guidance to governments for making risk management decisions related to the protection of public health and to the preservation of the environment; also

•Provide common background on which national or regional standards can be derived.

•They have an advisory nature based on the state-of-the-art in scientific research and epidemiological findings and are not to be confused with legal standards.

It must be stressed that WHO guidelines are not intended for absolute and direct application in every country.

But National Standards : are guidelines fixed by law in countries after being adapted to their national priorities and taking into account their:

      ·        Economic

      ·        Technical,

      ·        Social

      ·        Cultural, and

      .        Political situation.

At any time they can be changed or modified whenever new scientific evidence becomes available.

Any country had to make all efforts to reach DW limits as near as possible to the WHO guidelines.

Best regards