Skepticalscience iconSkepticalscienceSep 16, 2026 ~1 min source read

The next water crisis is beneath our feet

Scientists say the depleted groundwater supplies that remain will warm by 2.1 degrees C globally by the end of this century – changing their chemistry and leading to contamination. Droughts and fluctuating rainfall patterns are also altering groundwater quality.

The next water crisis is beneath our feet

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Scientists say the depleted groundwater supplies that remain will warm by 2.1 degrees C globally by the end of this century – changing their chemistry and leading to contamination.

Droughts and fluctuating rainfall patterns are also altering groundwater quality.

Warming water, changing chemistry As groundwater warms, dissolved gases become less soluble, while organisms underground can consume oxygen more rapidly.

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The useful part

Scientists say the depleted groundwater supplies that remain will warm by 2.1 degrees C globally by the end of this century – changing their chemistry and leading to contamination. Droughts and fluctuating rainfall patterns are also altering groundwater quality. Warming water, changing chemistry As groundwater warms, dissolved gases become less soluble, while organisms underground can consume oxygen more rapidly.

How it works

  • The work is in early stages, but some methods already are showing promise.
  • Because many aquifers already contain little oxygen, modest warming could make them even more oxygen-poor.
  • In some aquifers, this shift can mobilize naturally occurring contaminants such as ars...

What to take from it

Drought is only the beginning of the problem for drinking water.

Details worth keeping

The good news is that around the world, local and regional authorities are experimenting with ways to replenish groundwater, including methods for collecting excess rainfall or surface runoff and channeling it to replenish aquifers.

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