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 man's activities. Because of the toxic nature of some trace elements, water managers and scientists across the United States rate trace elements among the highest-priority issues for the National Water-Quality Assessment (NAWQA) program. The trace elements analyzed for in the Ambient Ground Water Quality Monitoring Network include: Arsenic Dissolved as As, Barium Dissolved as Ba, Cadmium Dissolved as Cd, Chromium Dissolved as Cr, Copper Dissolved as Cu, Iron Dissolved as Fe, Lead Dissolved as Pb, Manganese Dissolved as Mn, Silver Dissolved as Ag, Zinc Dissolved as Zn, Selenium Dissolved as Se, Mercury Dissolved as Hg, Beryllium Dissolved as Be, Thallium Dissolved as Tl, Antimony Dissolved as Sb, and Aluminum Dissolved as Al. Concentrations are reported in micrograms per liter, ug/l. This update (2013) includes the data from the completed second sampling cycle of all 150 wells which comprise the redesigned NJAGWQMN.
NJDEP, NJGWS (2020). Ambient-Metals of New Jersey [New Jersey]. . https://gisdata-njdep.opendata.arcgis.com/datasets/njdep::ambient-metals-of-new-jersey (web service)