Water is a major source of all life. Streams, rivers, lakes, wetlands and oceans are a habitats for myriads of plants and animals. In addition, groundwater is the main source of drinking water and an underestimated natural habitat. Water mainly contribute to quality of life – food, daily hygiene and recreational activities. As a source of energy, transportation medium and resource, water is also a crucial economic factor. Due to increasing competition, effective protection and careful use of the water is crucial for biodiversity and sustainable uses of this important resource.