Water Supply

The City of Rīga’s drinking water is obtained from two sources – the surface resource “Daugava” and underground resource “Baltezers – Zaķumuiža”.

Water supply from surface resources.

The majority of drinking water consumers in Rīga live on the Daugava’s left bank and receive their water from Rīga’s HES water reservoir. The water is pumped from the Daugava River’s (Rīga’s HES) deepest parts and transported through pipes to the “Daugava” water treatment station. Here the water is transformed to drinking water quality by adding chemical agents to purify and disinfect it, allowing it to settle and then by filtering it multiple times. Ozone is used to disinfect the water.

In a 24 hour period, the “Daugava” water treatment station is capable of producing up to 210,000 m3 of drinking water. Both the quality of the drinking water and plant safety conform to European standards.

Water supply from underground resources

For the most part, the underground resource “Baltezers – Zaķumuiža” ensures centralized water supply to consumers residing on the right bank of the Daugava. Water is taken from more than 300 groundwater and 15 pressurized filter wells drilled into quaternary rock up to a depth of 150 meters. The underground water reserve is supplemented with water from Mazais Baltezers using the infiltration method.

To ensure water conservation and renewal, and to minimize the negative effect of pollution on water to be obtained, underground water procurement points are guarded by a specified protection zone covering a total area of 83 km2 in the Ādaži and Garkalne region.

The underground water resource “Baltezers – Zaķumuiža” is capable of producing up to 85,000 m3 of drinking water in a 24 hour period. The quality of the drinking water complies with European standards with the exception of a portion that has an increased amount of iron and manganese content. To ensure the compliance of this indicator with EC regulations, an iron removal station is due to built in the near future.

Rīga’s Water Pipes

Rīga’s water pipes are built from a variety of materials and vary in diameter from 20 to 1200 mm and in early 2018 spanned total length of 1462 km.

In some areas of Rīga, the water pipes are more than 100 years old, which to a large extent explains water pipe malfunctions and the need for repairs. To improve water supply quality and safety, every year “Rīgas Ūdens” repairs or replaces the older and least safe water pipes and hydrants.  The cost of this work is covered by our own resources or EU Cohesion fund financing.

To ensure access to water in individual regionsof Rīga and to consumersin multi-story buildings (not less than the building code’s requirement for five-story residential buildings) the required pipe pressure throughout the territory of the city is ensured by 11 high water pressure stations.

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