Results of questionnaire research from 215 water supply companies, conducted in 2004-2005- Presentation of constructing technological water treatment draughts after introducing legal changes at the end of 2002. Noticed development tendencies in water treatment systems are: gradual replacing of chlorine by other disinfection means and introducing adsorption or biosorption processes, most commonly in ozone-carbon systems. Switching from closed to open aeration. Wider use of two- or multi-layered filters and two-leveled filtration.
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Estimation of the range of declared needs in the field of modernization of installations connected with water inta-king and treatment. (Modernization plans concern the intakes bringing ca 70% of all questioned companies" production).
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Analysisof the need to remove organie substances from water based on the results of questionnaires from 215 water supply companies. Analysis based on the values of pollution indexes for raw and treated waters, declared needs to increase the efficiency of admixtures re-moval and planned changes in technological sequences of water tre-atment.
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