Yorktown (Ty) Aquifer Chloride

This layer contains information on groundwater chloride levels in the Yorktown aquifer. Groundwater samples from the NC Division of Water Resources (DWR) Monitoring Well Network wells were collected in 2023 and analyzed for chloride by the DWR Groundwater Resources Branch staff. Chloride values were classified into three categories or zones: “freshwater”, “saltwater”, and “transitional”. The freshwater zone represents areas with chloride concentrations <100 parts per million (ppm). The saltwater zone represents areas with chloride concentrations >250 ppm, which is the North Carolina Groundwater Standard (“NC 02L Standard”) for chloride. The transitional zone represents areas where chloride concentrations are generally between 100-250 ppm. For questions, please visit the Groundwater Branch Contacts page.本图层包含约克敦含水层（Yorktown aquifer）的地下水氯化物含量相关数据。2023年，研究人员采集了北卡罗来纳州水资源部（NC Division of Water Resources, DWR）监测井网内各监测井的地下水样本，并由该部门地下水资源分部的工作人员完成氯化物含量检测与分析工作。研究团队将氯化物浓度划分为三类区域："淡水区""咸水区"与"过渡区"。其中淡水区对应氯化物浓度低于100 parts per million (ppm)的区域；咸水区对应氯化物浓度高于250ppm的区域，该数值符合北卡罗来纳州地下水氯化物标准（"NC 02L Standard"）；过渡区则对应氯化物浓度介于100-250ppm之间的区域。如需咨询相关问题，请访问地下水分部联系方式页面。