Environment week in Päijät-Häme

Environment week is about green actions and fun togetherness.
Päijät-Häme Environmental Weeks will be celebrated on May 25.5th – 7.6.2026 with the theme Water – explorations into the world of water.
The weeks are celebrated together with the Vesijärvi Foundation's Vesijärvi Week and the international Salpausselkä Geopark weeks.

In Hollola, Environment Week is celebrated together with all the municipalities of Päijät-Häme. So there are Asikkala, Hartola, Heinola, Hollola, Iitti, Kärkölä, Lahti, Orimattila, Padasjoki and Sysmä.

Come along

During Environment Week, various organizations organize environmentally-related events and activities, such as nature trips, recycling events, lectures or, for example, cleaning tasks. 

Poster competition and its theme

A joint poster competition has been organized for the environmental weeks, to which primary, middle and high school students from all municipalities in Päijät-Häme are invited. Entries from Hollola must be received at the Hollola Main Library at the Piipahlus Service Point no later than Friday. 24.4.2026 at 16 p.m. The competition work can be completed using any technique you like. Instructions for participation and contact information can be found in the sidebar.

The theme of this year's Regional Environment Week and poster competition is Water – explorations into the world of water. We encourage you to look at the water theme from different perspectives and consider how important water is. Water is one of the most important natural resources on Earth. It covers over 70% of our planet and constantly circulates in the atmosphere, soil and water bodies.

In all municipalities, a municipal winner to be awarded is selected, and the regional jury selects the poster of the year from all of them. The winners of the competition will be awarded. Exhibitions of the works that participated in the competition will be put together in municipal libraries or similar public spaces, and all works can be seen on the Facebook page of the Environment Week.

Everyone is invited

With the annually changing theme of Environment Week, we want to highlight and increase awareness of issues affecting our common environment. Everyone is welcome to join the Environment Week. You can organize an event or theme day, or participate in events organized by others. It is important to notice how by combining our forces we affect the environment even with small actions. Report your adventure or event to the environment week through your municipality's contact person.