[Status of water supply treatment techniques]

The paper portrays the difficulties with which the water works presently have to contend in the preparation of drinking water from polluted sources. Particular emphasis is on describing the present state of water treatment methods and what they are capable of achieving. After an overview of the substances found in ground and surface water that impair the preparation of drinking water, the methods available today for water treatment are described. Finally, practical examples showing the most effective combination of these methods in modern water treatment plants are presented.