What is saltwater intrusion, and when is it a relevant concern?”
Saltwater instrusion occurs when excessive pumping of groundwater, generally near coastlines, causes saltwater to infiltrate into freshwater aquifers (and in turn, wells), eventually making it undrinkable. Saltwater can corrode pipes and fixtures, as well as adversely affect nearby vegetation and agricultural lands. To control the problem, wells should be monitored and/or relocated away from areas where they could be invaded by saltwater. Users should also take care to limit consumption of their groundwater to allow adequate time for recharge to help preserve their freshwater source.
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