Longitudinal assessment of per- and polyfluoroalkyl substances and co-occurring inorganic and organic contaminants in Neshaminy Creek, Pennsylvania, November 2021

Per- and polyfluoroalkyl substances (PFAS) and co-occurring inorganic and organic contaminants are widely distributed in the environment and understanding their surface water sources is critical for water resource management. In November 2021, 13 sites were sampled along a stream reach in the Neshaminy Creek basin in southeastern Pennsylvania utilizing a time of travel sampling approach. The reach had known potential PFAS source inputs and documented PFAS detections in water samples. This data release describes the sampling approach, sample processing, laboratory analytical methods, and contains the results.

Site (Table_1_NC_2021_Site_Info) and constituent information (Table_2_Constituents) are provided in tab delimited text (txt) files. Results are provided in a machine readable format in Table_3_Reporting_Long.txt for the following hydrologic metrics and chemical constituents: (1) field parameters (instantaneous discharge, water and air temperature, barometric pressure, pH, specific conductance, and dissolved oxygen), (2) optical properties (ultraviolet (UV)-visible absorbance, and fluorescence), (3) dissolved organic carbon and total dissolved nitrogen, (4) major anions, (5) major and trace elements, (6) PFAS, (7) pharmaceutical compounds, and (8) volatile organic compounds. Table_4_Wide_Summary.xlxs is a summary file including the reported values, laboratory standard deviations, remark codes, and qualification codes from Table_3_Reporting_Long.txt as eight wide format pivot tables.

全氟和多氟烷基物质（Per- and polyfluoroalkyl substances, PFAS）以及与之伴生的无机与有机污染物广泛分布于环境中，明确其地表水来源对于水资源管理至关重要。2021年11月，研究团队采用水流传播时间采样法，在宾夕法尼亚州东南部内沙米尼溪流域的一段河道布设13个采样点并完成采样。该河段存在已知的潜在PFAS污染源输入，且过往水样检测中已证实PFAS的检出情况。本数据集发布内容涵盖采样方案、样品前处理流程、实验室分析方法，并附相关检测结果。
采样点信息（文件Table_1_NC_2021_Site_Info）与污染物组分信息（文件Table_2_Constituents）以制表符分隔文本（txt）格式提供。检测结果以机器可读格式存储于Table_3_Reporting_Long.txt文件中，涵盖以下水文指标与化学组分：(1) 现场监测参数：瞬时流量、水温与气温、大气压力、pH值、电导率、溶解氧；(2) 光学特性：紫外-可见吸收光谱与荧光特性；(3) 溶解性有机碳与总溶解氮；(4) 主要阴离子；(5) 常量与微量元素；(6) PFAS；(7) 药物类化合物；(8) 挥发性有机化合物。Table_4_Wide_Summary.xlxs为汇总文件，基于Table_3_Reporting_Long.txt中的数据，以8张宽格式数据透视表形式呈现检测值、实验室标准偏差、备注代码与合格代码。