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[INTERNATIONAL] · Norway · 23 sources

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Longyearbyen tap water contaminated by heavy metals due to permafrost thaw

Residents of Longyearbyen, Svalbard, are being advised not to drink untreated tap water following the detection of elevated heavy metal levels. The contamination, which has persisted for over a year, is linked to the thawing of permafrost caused by rising Arctic temperatures.

As the permafrost melts, it exposes rocks containing pyrite. When this mineral comes into contact with water and oxygen, it undergoes oxidation, facilitating the release of heavy metals into the water supply. Testing has identified high concentrations of manganese, nickel, and sulphate in the Isdammen reservoir, the town’s primary winter water source.

While manganese levels have decreased from a peak in September 2025—when they reached 25 times the recommended limit—recent tests still show levels exceeding safety guidelines. Local authorities are currently distributing purified water to the approximately 2,600 inhabitants and are evaluating long-term solutions, which may include a complete redesign of the water system or the construction of a desalination plant.

Entities

Emsland · Hannover · Holzminden · Isdammen · Landesamt für Statistik Niedersachsen · Longyearbyen · Lotto Niedersachsen · Lower Saxony · Lüneburg · Lüneburg Region · Marjolaine Verret · Niedersachsen

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