1. Who controls the quality of drinking water?
Systematic (regular) control of drinking water quality in Belgrade is performed by laboratories of the Belgrade Waterworks and Institute for public health.

2. Why is water yellowish and turbid (muddy)?
Sometimes it happens that water running from consumers’ taps is turbid. This occurrence is the result of water hammer that moves the residue that exists in internals pipe walls. The residue contains the iron compounds of yellowish color. Iron is not an element of special importance for health. The problem is resolved by running water for a while in order to clear the water. If necessary, expert teams of Belgrade Waterworks will rinse the water network in the street.

3. Why is water whitish?
The “white water” means the water where air is present in the form of bubbles. Using the scientific terminology, that is “dispersed air”. The bubbles exit from a glass of water in 30 seconds, so the water clarifies by itself. The cause of “white water” occurrence may be defective house installations that suck air. The problem is not of the importance from sanitary and hygienic aspect.

4. What is the drinking water hardness?
Water from Belgrade Waterworks is moderately hard. At the Sava river left bank, at Novi Beograd and Zemun, water hardness is 16-18 °dH. At the old part of Belgrade, on the Sava river right bank, water hardness is 13-15 °dH, and in southern parts of the city, such as Železnik, Barajevo, Resnik, Ripanj, residential areas at Avala, and Vinča, water hardness is 9-12 °dH.

5. Where is water sampled for the control?
Water is sampled every day in all production plants (“Makiš”, “Bele vode”, “Bežanija”, “Banovo Brdo” and “Vinča”) and water tanks once a week. Every working day, around 45 consumers’ taps are checked at the Belgrade Waterworks of 190 tapping places planned to be controlled. The similar sampling scheme uses the Institute for Public Health.

6. Are the asbestos pipes harmful to health?
The opinion of the World Health Organization is that asbestos fibers in water are not harmful to health. Asbestos dust is harmful that may be inhaled into organism.

7. Are the plastic pipes harmful to health?
Plastic pipes, if provided with attest for contact with victuals, in our case water, are not harmful to health. They are usually made of polyethylene.

8. What is within the maintenance scope of the Belgrade Waterworks?
Belgrade Waterworks maintains water supplying installations along with water meter and outlet valve (valve behind the water meter) and street sewer network, along with the line to the first inspection manhole (manhole closest to the street line) and street gutter.

9. Who is an investor of the city sewer network?
The investor for construction of new city sewer network is Land Development Public Agency (Njegoševa 84). The investor for reconstructions and rehabilitations of the existing Belgrade sewer system is Secretariat for urban and housing affairs.

10. Who empties cesspits?
Cesspits are emptied by specialized unit of PUC “City sanitation”, but there are some well-equipped entrepreneurs.

11. What is water consumption?
Water consumption is the amount of water used in a certain time period and represents a difference between two water meter readings. In cubic meters.

12. What are house installations?
House installations are consumer’s water supplying installations and devices that start behind the outlet valve on water meter within the water supply connection and finish with tapping point, and sewerage installations after (upstream) the first inspection manhole with.

13. Who maintains house installations?
House installations are maintained by the owner, i.e. user of the facility or company awarded with maintenance contract. As for residential houses, it is PUC “Gradsko stambeno”.

14. What comprises the price of water supply and sewerage services?
The price of service of Belgrade Waterworks and Sewerage consist of price for consumed water and price for discharge of waste water. Consumers not connected to sewer network do not pay waste water discharge services.

15. If there is no water supplying network in the street, who the citizens may apply to?
Request for the construction of new and reconstruction of old water supply network, the citizens may submit to Belgrade Land Development Agency (Njegoševa street No. 84, phone number 244-94-94) via local community or municipality office at the place of residence. If those areas are not planned for construction, the citizens may bear part of the cost for design and construction of the missing network.

16. Who the citizens may address to if want to be informed about procedure for connecting to the city water supply system?
All information on procedure for connecting to city water supply system may be obtained at the Department for technical documents at Belgrade Waterworks and Sewerage, Kneza Miloša str. 27, and also at Service center, at the same address, and phone numbers 206-50-21 and 206-50-22. Service center for Barajevo municipality is at Svetosavska str. 58, phone numbers 83-03-721 and 83-03-722.

17. Is chlorine or chlorine and fluorine used in water treatment?
During treatment proces of drinking water, it is necessary to be desinfected in order to provide microbiological water accuracy. In order to desinfect drinking water, Belgrade Waterworks uses chlorine and chlorine compounds. Belgrade Waterworks does not use fluorine for water treatment. Fluorine is used for other purposes. Some countries around the world use fluorine to prevent dental caries.