VATTEN
Reykjavik
Lava and glacier. The cleanest tap water on earth.
Gvendarbrunnar springs and Árnarnes springs (Heiðmörk nature reserve) — cold groundwater springs from glacially recharged basaltic lava aquifer. Quaternary basaltic lava. Rainwater infiltrates through porous lava and reemerges as cold springs after years of filtration. Geothermal hot water is a SEPARATE system — drinking water uses cold springs only.
1.2°dH
Hardness
8.2 mg/L
Calcium
A
Political grade
5
Drug traces
Taste Profile
Lava and glacier. The cleanest tap water on earth.
Reykjavik water emerges from cold springs at 5°C after years of filtration through porous basaltic lava. Hardness: 1.2°dH — essentially pure water. Silica at 14.2 mg/L (from lava) is the only notable mineral. PFAS: 0.00088 ng/L total — lowest of any city VATTEN has tested. Microplastics: 0.4 particles/L — also lowest. No pharmaceuticals detectable. No buying bottled water in Iceland — it would be an embarrassment. Orkuveita Reykjavíkur (Reykjavik Energy) runs the cold drinking water system and the geothermal heating system as entirely separate infrastructure.
Tasting notes
Body
Light body
Hardness
Soft — 0–7°dH
Finish
Immediate. Like drinking cold air.
Pairs with
- —Skyr
- —Arctic char
- —Brennivín (the Black Death)
- —Nothing — it competes with nothing
Water Memory
The island still being born, and the water born with it.
The island emerged from the sea 20 million years ago. Its water system is equally young — there are no ancient aquifers, no deep limestone caves, no millennia of accumulated minerals. Rain falls on a young volcanic island, percolates through lava rock, and emerges cold and almost empty of everything.
“Íslenskt vatn er hreinsasta vatn í heimi.”
Icelandic — 'Icelandic water is the cleanest water in the world.' — Icelandic Tourism Board, also true.
Geological memory
Iceland sits on the Mid-Atlantic Ridge — the island is still forming from volcanic activity. Basaltic lava covers most of the island; the same rock that created Iceland now filters its water.
Political memory
Orkuveita Reykjavíkur (OR) is owned by the City of Reykjavik and neighbouring municipalities. No privatisation. The geothermal hot water system — which heats almost all Icelandic buildings — and the cold drinking water are run as entirely separate utilities under the same organisation.
Cultural memory
Iceland has two water temperatures from every tap — a geothermal hot tap and a cold drinking tap. Visitors sometimes confuse them (the hot tap smells of sulfur). The cold water is extraordinary; the hot smells like an egg sandwich.
Water Politics
Overall
Reykjavik's lava-filtered spring water is among the world's cleanest. The only limitation is very small population giving limited monitoring data volume.
Failures
- ×Tiny population (138k) — monitoring data from small sample
- ×Natural volcanic arsenic slightly elevated (still well within WHO limits)
- ×Remote island — infrastructure has limited redundancy if springs fail
Achievements
- ✓Lava filtration — no treatment plant needed beyond UV
- ✓Zero PFAS — no industrial or military sources
- ✓Lowest microplastics of any VATTEN city
- ✓No agricultural catchment contamination
- ✓UV-only — absolutely no chemical treatment
- ✓Springs in protected Heiðmörk nature reserve
What Reykjavik must do
Expand arsenic monitoring for natural volcanic sources; increase source spring redundancy