[The organic carbon--issues of hygienic regulation and harmonization].

This study is devoted to the investigation of possibility to use the total organic carbon as regulated index in drinking water as well as to the issues of hygienic regulation and harmonizing this index with the standards of other countries. Basing on the results of 3 years lasting investigation carried out by Municipal Unitary Enterprise "Vodokanal" of Yekaterinburg city permits to propose as the most informative and reliable index of the presence of organic substances in drinking water the content of total organic carbon in comparison with currently regulated permanganate oxidability, chemical and biochemical oxygen consumption.

[Water decontamination in the swimming pools: standardization and practice].

Practical examples were used to analyze possible ways and regimens of water decontamination with chlorine and ozone in the swimming pools when oxidants substantially interacted with the mineral and albuminoid ammonias that were present in the water. Ozone water decontamination was shown to be more effective than water chlorination and to rule out the generation of chloramines that were responsible for their strong irritating activity. Redox potential measurement used as an auxiliary method substantially alleviates on-line technological monitoring of the efficiency of water decontamination at the critical control point during chlorination and, during ozonation, makes up the existing gap of the current SanPiN 2.

[Experience of organization of flushing and disinfection of centralized system of hot water supply in town Verkhnyaya Pyshma after its colonization by Legionella].

Causes of outbreak incidence of pneumonia due to Legionella infection in population of Verkhnyaya Pyshma as well as factors promoting colonization of town's hot water supply system by Legionella were discussed. Experience of organization of flushing and disinfection of hot water supply system was described, effectiveness of different methods of disinfection was evaluated.

[Evaluation of the effect of drinking water quality on the population's health].

The paper presents data on the quality of drinking water used by the population in the Sverdlovsk Region when water is supplied in the centralized and non-centralized fashion. Interaction of the centre with the Russian consumption inspectorates of the Sverdlovsk Region, different designing, scientific, and profit-making organizations concerned has made it possible to define priority measures and lines to improve water supply systems and the technologies for the preparation, transportation, and delivery of qualitative water to the population.