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Impacts of the 2021 La Palma volcanic eruption on drinking water quality (Canary Islands, Spain)

Author

Listed:
  • Jelena Koritnik

    (Universidad de La Laguna (ULL))

  • Noelia Cruz-Pérez

    (Universidad de La Laguna (ULL))

  • Alejandro García-Gil

    (Consejo Superior de Investigaciones Científicas)

  • Juan Carlos Santamarta

    (Universidad de La Laguna (ULL))

Abstract

The 2021 Tajogaite eruption on La Palma, Canary Islands, disrupted groundwater systems and raised concerns regarding drinking water safety. This study evaluates post‐eruption changes in drinking water quality using an eight‐year dataset (2016–2023) of disinfected supply water sourced from groundwater, alongside complementary datasets for geology, hydrogeology and water supply infrastructure. 24 water quality parameters are analysed using an integrative framework combining nonparametric testing, municipality-scale spatial assessment, trend analysis, and interpretative evaluation. Post‐eruption changes are observed in electrical conductivity, pH, turbidity peaks, major ions, and trace metals. Among detected concentrations post-eruption, statistically significant increases are found for Hg, Cr, Cd, Sb, Cu, Mn, Al, with reductions in the percentages of samples below detection limits (%

Suggested Citation

  • Jelena Koritnik & Noelia Cruz-Pérez & Alejandro García-Gil & Juan Carlos Santamarta, 2025. "Impacts of the 2021 La Palma volcanic eruption on drinking water quality (Canary Islands, Spain)," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 121(18), pages 22151-22182, November.
    • Handle: RePEc:spr:nathaz:v:121:y:2025:i:18:d:10.1007_s11069-025-07682-6
    DOI: 10.1007/s11069-025-07682-6
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