Road salt is used for snow and ice control. Communities and individuals should use care when applying salt, especially in areas of swale drainage. Salt applied to roadways can run off the roadway and infiltrate into soils or reach stormwater injection wells, thereby increasing chloride levels in ground water. Chloride can be long lasting in slow-moving ground water. Chloride may also be discharged from ground water into surface water or to surface water directly via runoff.