Groundwater-quality data in the South Coast Interior Basins study unit, 2008: Results from the California GAMA Program

Abstract

250 mg/L and 9 of these detections also were above the upper SMCL-CA threshold of 500 mg/L. Twenty-five grid wells (of 35 sampled) had measured TDS concentrations above the SMCL-CA-recommended threshold of 500 mg/L, and 10 of these wells also were above the SMCL-CA upper threshold of 1,000 mg/L. Basins Project analyzes samples for a suite of constituents more extensive than that required by CDPH, and for a suite of chemical and isotopic tracers for exploring hydrologic and geochemical processes. A broader understanding of groundwater composition is useful for identifying the natural and human factors affecting water quality. Understanding the occurrence and distribution of chemical constituents of significance to water quality is important for the long-term management and protection of groundwater resources.