Water services customer service offices and plants

​​​​​​​​​​Water services customer service office 

Water servi​​​ces customer service is open Monday to Friday at 8.30 a.m. to 3.30 p.m. 
You can reach Connection matters by phone from Monday to Friday at 8.30 a.m. to 1.00 p.m., tel. +358 (0)9 1561 2110.​

Address: HSY Head Office, Ilmalantori 1, 00240 Helsinki 
Mailing address P.O. Box 100, 00066 HSY. 

Head Office's location »

HSY's water treatment plants and waste water plants

We don't have customer service at out plants.

Pitkäkoski water treatment plant

Kuninkaantammentie 17, 00430 Helsinki

Vanhakaupunki water treatment plant

Jokiniementie 1,  00650 Helsinki

Suomenoja waste water plant

Hylkeenpyytäjäntie 2, 02270 Espoo 

Viikinmäki waste water plant

Hernepellontie 24, 00710 Helsinki