In 2022, researchers found that salt levels within water-quality guidelines could still damage lake food webs; tiny algae-eating animals were vulnerable

A recent international study reveals that current salt limits for freshwater lakes are inadequate. Zooplankton populations significantly declined at many sites, impacting the food web. This ecological damage occurred at salt levels considered safe by governments. The findings highlight the urgent need to reassess and lower existing sodium chloride thresholds. Reducing road salt use and finding alternatives are crucial for lake protection.