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JYVÄSKYLÄ WATERWORKS

Jyväskylä Waterworks, a part of Jyväskylä Energy Ltd, ensures the supply of safe tap water to over 120,000 people in Jyväskylä. They also focus on wastewater treatment to protect the environment. Learn about their water sources, treatment plants, and ongoing research projects.

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JYVÄSKYLÄ WATERWORKS

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  1. JYVÄSKYLÄ WATERWORKS Marja-Liisa Puttonen 14.9.2009

  2. JYVÄSKYLÄ WATERWORKS – PART OF JYVÄSKYLÄ ENERGY LTD • Until the end of the year 2005 Jyväskylä Waterworks was a municipally owned business department. From the beginning of the year 2006 Jyväskylä Waterworks started as one of the business lines of Jyväskylä Energy Ltd. • As Korpilahti and the Rural Municipality of Jyväskylä merged into the City of Jyväskylä in 2009, Jyväskylä Energy bought their waterworks. • Jyväskylä Energy Ltd is owned by the City of Jyväskylä (100 %). Company’s main businesses are electricity sales, district heat sales, transmission of electricity, constructing energy networks and water sales. • Water business’s duty in Jyväskylä Energy Ltd is to provide the inhabitants of Jyväskylä with healthy, safe and high quality tap water. We also take care that wastewater and rainwater don’t pollute or harm the environment. • 16,453 customers – about 120,000 people served

  3. AVERAGE CONSUMPTION OF FRESH WATER: 220 LITRES PER DAY • All our production facilities function under a centralized remote control system. • The city’s water supply has 821 km freshwater lines and 1,198 km waste- and rainwater sewers. • Our services cover more than 94 % of Jyväskylä’s inhabitants. • Fresh-water delivery will be about 10 million m3 in 2009. • Water-usage per inhabitant in the city is about 220 litres/day. • Since the year 2000 our main water source has been Vuontee Artificial Groundwater Plant. It lies 25 km north-east from Jyväskylä.

  4. PURCHASING OF WATER IN 2008 Laukaa 3 % Muurame 1 % Janakka 13 % Vuontee 58 % Viitaniemi 25 %

  5. JYVÄSKYLÄ TREATS WASTEWATERS FROM FOUR MUNICIPALITIES • The wastewater is treated by a separate company, owned by three neighbor municipalities. • Three surrounding municipalities pump their wastewaters into the wastewater treatment plant situated in Jyväskylä. • In wastewater treatments the BOD7-reduction is 96 % and Phosphorus-reduction 94 %.

  6. SUMMARY: WATERWORKS • Operations began on 26.11.1910: • Savela groundwater plant, 400 m³ tank on the Harju ridge, approx. 5 km of fresh water lines and 2 km of sewers commissioned • Viitaniemi surface water plant started up in 1940, average daily production was about 2000 m³. From the beginning of the year 2001 the plant served as a reserve plant – nowadays it’s in regular production in winter. • Vuontee Artificial Groundwater Plant was completed in the year 2000. Average daily production is 15,000 m³. • Water charge 1,50 €/m³ – waste water charge 1,81 €/m³ • 34 fresh water and 202 waste water pumping stations • 11 water towers

  7. WATER CONSUMPTION ACCORDING TO USE Cleaning 3 % Other 2 % Food preparation and drinking 5 % Washing dishes 13 % Personal hygiene 38 % Washing clothes 13 % Flushing the toilet 26 %

  8. VUONTEE ARTIFICIAL GROUND WATER PLANT • Permission from the Water Court was obtained in 1996. Plant was taken in use in November 2000. • Allowed volume of water pumped is 25 000 m³/day at maximum. The amount of artificial water pumped is restricted to 15 000 m³/day as an annual average. • Water is taken from Lake Kuusvesi and recharged into Vuontee ridge. • Deacidification is carried out by calcareous filtration and disinfection by means of UV radiation. • Main line from Kuusvesi to Jyväskylä is around 25 km long. • Total cost was approx. 14.5 million euros. • Central Finland Environment Institute contributed the construction of trunk lines and pumping station for untreated water with 1.5 million euros.

  9. VUONTEE ARTIFICIAL GROUND WATER PLANT AND RESEARCH • EU development project • Development of recharging techniques and the utilization of a ground water model in plant automation • Cost estimate 1 million euros, of which 340,000 euros EU funding and 340,000 euros state funding • Development work was conducted during the period 1998–2000 • TEKES* research project (*National Technology Agency) • Creation of artificial ground water: recharging techniques, soil processes and water quality • Finnish Forest Research Institute was coordinating the project, which involved waterworks, consultants and state institutes • Cost estimate was 1.35 million euros • TEKES provided funding with 350,000 euros, Jyväskylä Waterworks contributed with approx. 100,000 euros • Research work was conducted during the period 1998–2001

  10. VUONTEE ARTIFICIAL GROUND WATER PLANT AND RESEARCH • Hämeenlinna research • Impacts of recharging on forest land and vegetation • Finnish Forest Research Institute was conducting the research, funded by Waterworks and the Finnish Environment Institute • Cost estimate was 170,000 euros, Jyväskylä Waterworks contributed with 20,000 euros • Research work was conducted during the period 1997–2001

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