Water is propably the most accesible resource in Iceland. In the countryside from streams and rivers, the water is coming straight from the ground and is pure and usually drinkable. However in sand and lava areas water needs to be carried. Never take water from areas where farms or fields are upriver. There you can visit the farms and get tap water. Water from glacier rivers should only be drunk in emergency and preferably filtered. Usually 1 to 2 liters of water carrying capacity is enough. Basically, if you're not drinking mud or seawater, it's ok to drink.
Water, in one form or another, covers a staggering 2,750 km² of Iceland's landmass an there are over 10,000 waterfalls found in the country, including Europe’s most powerful cascade, Dettifoss.
Not only is the water cherished and protected as a sacred medicine in Iceland for drinking it also is used for heating all the houses in Iceland. Hot spring water is pumped out of the earth and sourced through 99% of the houses for warmth in the cold winter.
One of Iceland’s greatest attractions are the natural, geothermally heated pools. Iceland is a very young country, geologically speaking, with constant changes in how the rock formations move and sculpt the earth's surface. Cracks and ridges are common sightings, as are areas exposed to the bubbling, water of the planet. It is this heat from beneath the surface that keeps Iceland's geothermal pools so warm and relaxing. To name a few of the natural hot springs we have, Seljavallalaug, Grettislaug (pictured below), Krossneslaug, Guðrúnarlaug, Kvika Foot Bath.