NJDEP, NJGWS, Division of Water Supply and Geoscience, Bureau of Water Resources and GeoscienceThis update (2024) includes the trace elements (metals and metalloids) data from the 6th sampling cycle (2020-2022) of the New Jersey Ambient Groundwater Quality Monitoring Network (AGWQMN). Trace elements are inorganic chemicals that generally occur at concentrations less than 1 mg/L in water. Metals and metalloids are classified as trace elements. They occur naturally in ground water but can also be introduced or mobilized by human activity. The trace elements analyzed for in the Ambient Ground Water Quality Monitoring Network include: Arsenic dissolved as As, Barium dissolved as Ba, Beryllium dissolved as Be, Boron dissolved as B, Cadmium dissolved as Cd, Chromium dissolved as Cr, Copper dissolved as Cu, Iron dissolved as Fe, Lead dissolved as Pb, Manganese dissolved as Mn, Nickel dissolved as Ni, Zinc dissolved as Zn, Antimony dissolved as Sb, and Aluminum dissolved as Al, Selenium dissolved as Se, Mercury dissolved as Hg. Samples were analyzed using United States Geological Survey (USGS) National Water Quality Laboratory (NWQL) Schedule 1622, Trace Elements. Concentrations are reported in micrograms per liter, ug/l. 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.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/6e13a4b1aaed449ebfa6006f5e990073_10engNew Jersey Department of Environmental Protection's (NJDEP) Bureau of GISPublicNJ Ambient Groundwater Quality Monitoring Network, Metals, 2020-2022 [New Jersey]Web servicesNew Jersey2020-2022