Saltwater contamination in freshwater systems is on the rise

Salt is starting to pollute the freshwater sources people rely on.

Mar 19, 2025 - 16:30
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Saltwater contamination in freshwater systems is on the rise

Global sea levels rose faster than expected last year, largely due to warming ocean temperatures, a new NASA analysis found.

As seawater creeps further into coastlines, salt threatens to pollute the freshwater reserves that people depend on. But this brine isn’t just coming from the ocean: New research shows freshwater ecosystems are facing widespread dual threats of salt contamination from the sea and land, made worse by climate change.

Humans are a salty species, using the mineral for a vast number of reasons—from de-icing the roads during snowstorms to seasoning food.

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