Abstract:
The whole approach of the problems that results from the ensurance of the used water quality with durable protection of water as a key environmental factor has led to more and more emphasized worldwide outline of new orientations in the specific activity of water quality protection, in the last decade of the XX th century. Water quality is most concerned by human pouring of the used water. Therefore, the main practical protective measure of the surface water quality is to filter the used water. The used water filter consists in the removal of colloidal substances in suspension or toxic substances, microorganism etc. in solution, for public health and emissaries’ protection. This act must be undertaken for further emissary’s water utilization with different views to: water supplies, pisciculture, agriculture, rest places etc.