NJ Ambient Groundwater Quality Monitoring Network, Pesticides, 2020-2022

This update (2024) includes the pesticides data from the 6th sampling cycle (2020-2022) of the New Jersey Ambient Groundwater Quality Monitoring Network (AGWQMN). Pesticides are synthetic chemical compounds used to control undesirable organisms such as weeds, funguses, insects, and vermin. Major categories of pesticides include insecticides, miticides, fungicides, herbicides, and rodenticides. For this cycle, United States Geological Survey (USGS) National Water Quality Laboratory (NWQL) Schedule 2033 was used to analyze for a suite of pesticides. Concentrations are reported in micrograms per liter (ug/L). Pesticide analyses designated as dissolved refer to a representative water sample that has passed through a 0.7-micrometer membrane filter before analysis. New Jersey's AGWQMN is a cooperative program between the New Jersey Department of Environmental Protection (NJDEP) and United States Geological Survey (USGS). The goals of the current network are to determine the status and trends of shallow groundwater quality as a function of land use related to non-point source pollution in New Jersey. This network consists of 150 monitoring wells screened at the water table. Thirty of these wells were sampled per year on a 5 year cycle from 1999-2013. Beginning with the 4th sampling cycle in 2014, the sampling frequency was changed to once every 3 years (3-year cycle). This layer includes data from sampling cycle 6; samples were collected between 2020 and 2022. The New Jersey Geological and Water Survey (NJGWS) manages the network design, well installation, well maintenance, data interpretation, reporting, and a portion of the well sampling. The NJDEP Bureau of Fresh Water and Biological Monitoring and the United States Geological Survey (USGS) collect the remaining ground-water samples and the USGS National Water Quality Laboratory in Denver, Colorado or their contracted laboratories analyzes them. Chemical and physical parameters analyzed at each well include field parameters such as pH, specific conductance, dissolved oxygen, water temperature and alkalinity, major ions, trace elements (metals), gross-alpha particle activity (radionuclides), volatile organic compounds, nutrients, and pesticides.本次2024年更新包含新泽西州环境地下水质量监测网络（New Jersey Ambient Groundwater Quality Monitoring Network，AGWQMN）第6次采样周期（2020—2022年）的农药检测数据。农药是用于防治杂草、真菌、昆虫及啮齿类等有害生物的合成化学化合物，主要类别包括杀虫剂、杀螨剂、杀菌剂、除草剂及杀鼠剂。本次采样周期采用美国地质调查局（United States Geological Survey，USGS）下属国家水质实验室（National Water Quality Laboratory，NWQL）的2033号检测规程，对一组农药复合组分开展分析，检测浓度以微克每升（ug/L）为单位报告。标注为“溶解态”的农药检测结果，指检测前水样已通过0.7微米微孔滤膜的代表性水样检测数据。 新泽西州环境地下水质量监测网络是新泽西州环境保护部（New Jersey Department of Environmental Protection，NJDEP）与美国地质调查局（USGS）合作开展的项目，其当前目标为针对新泽西州与面源污染相关的土地利用类型，探明浅层地下水水质的现状与变化趋势。该监测网络共布设150眼潜水位监测井（滤水管安装于潜水面处）：1999年至2013年期间，该网络以5年为一个采样周期，每年采集30眼监测井的水样；自2014年第4次采样周期起，采样频率调整为每3年1次（3年周期）。 本次数据图层包含第6次采样周期的相关数据，采样时段为2020年至2022年。新泽西州地质与水文调查局（New Jersey Geological and Water Survey，NJGWS）负责监测网络的设计、井体安装、维护、数据解译、报告编制以及部分采样工作；剩余地下水样品的采集由新泽西州环境保护部淡水与生物监测局及美国地质调查局（USGS）负责，样品则由位于科罗拉多州丹佛市的USGS国家水质实验室或其签约合作实验室完成分析。 每眼监测井的检测理化参数涵盖现场测定参数（pH值、比电导率、溶解氧、水温、碱度）、主要离子、微量元素（金属类）、总α粒子活度（放射性核素）、挥发性有机化合物、营养盐及农药类物质。