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How is the whole WSS divided into?

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The whole water supply system is divided into water supply zones: water supply zone “North”, water supply zone “South”, water supply zone “Center”.

The source of water supply zones is the main waterworks.
Each water supply zone is divided into water supply districts. The water supply districts are divided into water supply sectors.
Each sector is divided into segments. A segment is a basic territorial unit of the water supply system served by one structural division – a team.

3. Vodokanal applies a three-stage process of water disinfection, doesn’t it? What else is used to ensure removal of odors and oil products?

Since 2007, Vodokanal applies a unique two-stage process of overall water disinfection at St. Petersburg waterworks. This process is based on a highly effective but safe chemical – sodium hypochlorite (chemical method) and UV water treatment (physical method). Such combination enables us to fully guarantee epidemiological safety of water supply in St. Petersburg, and total compliance of microbiological indicators of water quality with the current norms. Saint-Petersburg is the first megalopolis to treat all potable water with ultraviolet and to use no liquid chlorine for potable water disinfection.

Another technology used by Vodokanal for over two years is a powdered activated carbon (PAC) dosing system which ensures removal of odors and oil products.

UV Plant


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