The surface water chloride concentration (47.8 mg/L) is 239-time higher than the average for Adirondack lakes not impacted by road salt. In addition, Mirror Lake experiences a buildup of salt laden water at the bottom of the lake as a result of direct stormwater inputs. At the bottom of the lake chloride concentrations have been recorded as high as 125 mg/L, or 520-times higher than lakes not impacted by road salt.[1]