The works commissioned by the Environmental Board were financed from the European Union Cohesion Fund within the framework of investments in the project “Preservation and Restoration of Protected Species and Habitats”.

The area is hydrologically highly prized for the prevention of coastal erosion, sediment trapping, maintenance of water quality, and support of food chains.

The mix of state and private lands supports about 100 inhabitants but is an important area for fishing and ecotourism, as well as for environmental education, scientific research, and curative sea mud (peloid).

[8] West Estonian Archipelago, including Käina Bay, was from 1990 listed as UNESCO Biosphere Reserve which are wholly or partially World Heritage sites.

The latest research was conducted in 2013-2014 by Centre of Excellence in Health Promotion and Rehabilitation (Estonian: Tervisedenduse ja Rehabilitatsiooni Kompetentsikeskus).

[13] The results confirm that Käina Bay contains the most mineral sediments and the lowest concentrations of heavy metals out of all analyzed mud deposits in Estonia.