Please note! Maintenance break in the Avoindata service on 16.04.2025 at 12:00-16:00. During the maintenance break, there may be disruptions in the use of the service. We apologise for any inconvenience caused by the disruption.
Lahti is a city and municipality in Finland. Lahti is the capital of the Päijänne Tavastia region. It is situated on a bay at the southern end of lake Vesijärvi about 100 kilometres north-east of the capital Helsinki.