Water treatment plants

​​HSY produces domestic water in two surface water treatment plants: In Pitkäkoski and Vanhakaupunki in Helsinki. In addition to this, a small part of Vantaa residents get their drinking water from Kuninkaanlähde ground water intake plant.

The raw water of Pitkäkoski and Vanhakaupunki water treatment plants travels to them from Lake Päijänne through a rock tunnel. Around one third of Espoo residents received their drinking water from Dämman until October 2016.

We organise guided visiting tours for groups at the Viikinmäki wastewater treatment plant, Vanhakaupunki water treatment plant and Pitkäkoski water treatment plant. Fill in a form to reserve a visit.