PRAGUE WEB

MAGISTRÁT HLAVNÍHO MĚSTA PRAHY
PRAGUE CITY HALL

Ročenka – zpráva o stavu životního prostředí
Yearbook – report on state of the environment

 
 
 

B2.2  DRINKING WATER

B2.2.1  Drinking water supply through the public water supply system

The drinking water supply, discharge, and treatment of waste water are the basic services of the City of Prague. In order to provide for these services on the City territory water management infrastructure has been built a systematic way for over hundred years, which in its range and value represents one of the most important items of the City property.

The public water supply system in Prague and the drinking water treatment plants for the customer drinking water supply has been administered by Pražská vodohospodářská společnost, a. s. (PVS) since the beginning of 1998.

The joint stock company of Prague Water Mains and Sewerage Systems Co. (Pražské vodovody a kanalizace, a. s. = PVK, a. s.), a member of the Veolia Voda group, is the operator of the Prague’s water supply system. The company of Pražské vodovody a kanalizace, a. s. provides for the production and delivery of drinking water to parties purchasing on the City territory (partially also in the City adjacent areas), as well as the water consumption metering.

Water production: In 2009 there were produced 122.9 million m3 drinking water in total. Out of that amount 16.3 million m3 went to parties purchasing out of the City territory. Compared to 2008, there were produced by 2.6 million m3 water less, that means the drop in water production by 2%. Trend in the water production decreases, which started in 1991, and it has been still continuing yet the annual drop value will probably be reduced in next years.

All water consumed in Prague is produced in sources operated by Prague Water Mains and Sewerage Systems Co. The most important share of the water produced for the Prague supply comes from the Water Treatment Plant Želivka (74% in 2009, the resource is the Water Reservoir Švihov), then the Water Treatment Plant Káraný (26%, water resources are points of the bank and artificial recharge filtration of water from the Jizera River). Both sources are located out of the City territory. The Water Treatment Plant Podolí (the resource is the Vltava River on the City territory) has been used only as a back-up source in recent years.

The drinking water produced by the company of PVK, a. s. is delivered to approx. 1.25 million inhabitants of the City of Prague and further almost 200 thousand residents of other regions of the Czech Republic.

Tab. B2.2.1 Development in the drinking water production in Prague

Rok
Year

Počet obyvatel zásobených
z veřejného vodovodu
The number of inhabitants supplied
with water from public mains

Vyrobená voda pitná
[tis. m3]
Drinking water produced
[thousand m3]

Pitná voda k realizaci
[tis. m3]
Drinking water for sale
[thousand m
3]

Pitná voda k realizaci
[l/osoba/den]
Drinking water for sale
[l/person/day]

2005

1 172 000

132 264

118 052

276

2006

1 184 000

131 366

116 250

269

2007

1 204 800

128 052

112 335

255

2008

1 226 700

125 438

108 913

243

2009

1 245 600

122 865

106 538

234

Source: PVK, a. s.

Fig. B2.2.1  Sources and distribution of drinking water in Prague

b2_2_01

Source: PVK, a. s.

Fig. B2.2.2  Development in the drinking water production

b2_2_02

Source: PVK, a. s.

Water consumption: The specific consumption of drinking water in households has decreased by over 45% since 1990. At present it is 114 litres per capita and day. The water consumption drop was affected by several factors – price level of for water delivery and discharge levies, education focused on water savings, and penetration of households with water saving appliances. No further significant drop in water consumption is expected.

Fig. B2.2.3  Development of the specific consumption of drinking water in Prague

b2_2_03

Source: PVK, a. s.

Water loss since 1996, when it accounted for record breaking 46%, have been managed to reduced successfully. The effective measure for is the subdivide the public water mains network into respective delivery zones and their permanent monitoring and assessment along with active searching for hidden water leakages. At present water loss from the distribution network is about 20%.

Fig. B2.2.4  Water loss in the public mains network

b2_2_04

Source: PVK, a. s.

Water distribution on the territory of Prague is, due to complex topography of the terrain, very technically demanding. There are 3,726 km of water mains (excluding branches), out of that 3,694 km mains for the drinking water supply, 762 km water mains branches, 43 pumping stations, and 68 water reservoirs with total usable capacity of 679,500 m3. The water distribution network is structured into almost 170 self-standing delivery zones, which are delivering water to end consumers.

Tab. B2.2.2 The public water mains network supplying drinking water to Prague

Délka vodovodní sítě

3 694 km

Public mains network length

Délka vodovodních přípojek

762 km

Length of branches to the public water mains network

Počet vodovodních přípojek

100 930 ks

Number of branches to the public water mains network

Počet havárií na vodovodních řadech a přípojkách

4 377

Number of failures of branches and the public water mains network

Počet odběrových míst (vodoměrů)

108 663 ks

Number of delivery points (water meters)

Počet čerpacích stanic

43 ks

Number of pumping stations

Počet vodojemů

68 ks

Number of drinking water reservoirs

Objem vodojemů

949 600 m3

Capacity of drinking water reservoirs

Source: PVK, a. s.

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B2.2.2  Drinking water quality

Drinking water from public water mains as supplied by the company of Pražské vodovody a kanalizace, a. s. is innocuous in the whole City of Prague and its quality has been checked in a systematic manner. It can be stated, on the basis of permanent monitoring of drinking water quality, that the quality of the water supplied is in full compliance with domestic as well as European standards concerning its physical, chemical, microbiological, and biological properties.

The drinking water quality has been monitored in compliance with the Decree No. 252/2004 Code, in valid wording, establishing requirements for drinking water and hot water, the extent and frequency of drinking water checks. This is an executive decree to the Act No. 258/2001 Code on public health protection.

Fig. B2.2.5  Comparison of water treatment plants and public water supply system in light of selected indicators

b2_2_05

Source: PVK, a. s.

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B2.2.3  General Plan for the Water Supply to the City of Prague

The fundamental whole-City conceptual document for the drinking water supply and industrial water supply is the General Plan for the Water Supply to the City of Prague. The General Plan solves the two major directions of the City water supply system; it is one of the supportive documents for the working out of the Development Plan of Public Water Mains and Sewerage System of the City of Prague and of the Land-Use Plan of the City of Prague. The whole project was, for time and financial reasons, subdivided into two basic phases, the conceptual one and the detailed one. In 2001 to 2003 the conceptual phase enabled to develop the Conceptual Model of the Distribution System and following documents. Since 2005 respective projects of the Detailed Phase have been implemented.

In 2009 the detailed phase of the General Plan for the Water Supply to the territories of the City Districts of Smíchov, Košíře, Motol, Jinonice, Radlice, and Zlíchov. The party ordering was Pražská vodohospodářská společnost, a. s. and the supplier was HYDROPROJEKT CZ, a. s. The document is completed and negotiated with PVK, a. s.

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© Magistrát hlavního města Prahy | Prague City Hall
Únor 2011 | February 2011