Evidence of Salt‐Water Intrusion in Southeastern Long Island

Abstract
A preexisting network of 124 wells used for fire protection in the Town of Southampton, Long Island, New York, was monitored during a one‐year period for groundwater levels and chloride concentrations. Water from 26 wells had chloride concentrations of 50 mg/l or greater and in 17 wells the chloride concentration exceeded 200 mg/l. Most of these wells are located in two densely populated areas. The possibility of widespread intrusion in one of these areas has not been previously documented. In addition, detailed water‐table contour maps are presented for selected areas within the Town.

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