Where does your drinking water come from?

We produce household water for Helsinki residents both at the Vanhakaupunki and Pitkäkoski water treatment plants. The Pitkäkoski water treatment plant also provides water for Kauniainen, Vantaa and Espoo. In addition to this, a small number of Vantaa residents get their drinking water from Kuninkaanlähde groundwater intake plant.

Your water com​​es from Päijänne

When you open your tap, the flowing water originates from Lake Päijänne. The raw water travels around 120 kilometres in a tunnel from Lake Päijänne to Helsinki. The water is treated at the water treatment plants in Pitkäkoski and Vanhakaupunki before it is released in to the pipes for the residents to use.​

Pitkäkoski and Vanhak​​aupunki water treatment plants

We treat the raw water from Lake Päijänne into household water at the Pitkäkoski and Vanhakaupunki water treatment plants in Helsinki. The treatment process is similar at both plants.

Dämman w​​ater treatment plant

The operation of the Dämman water treatment plant was terminated in November 2016.

The groundwate​​r plant

​We have one groundwater plant in use. The Kuninkaanlähde water intake plant is located in Tuusula, in the Huhtariihi area. Its distribution area mainly includes the districts of Korso, Vallinoja and Vierumäki in Vantaa.​