Identifying and explaining trends in groundwater quality is one of the goals of the GAMA-PBP work. This page highlights products that describe monitoring program design elements for trend sampling, as well as discussions of specific trends in specific places.
A partial exponential lumped parameter model to evaluate groundwater age distributions and nitrate trends in long-screened wells
Triennial changes in groundwater quality in aquifers used for public supply in California: utility as indicators of temporal trends
Identifying areas of degrading and improving groundwater-quality conditions in the State of California, USA, 1974–2014
Quantifying anthropogenic contributions to century-scale groundwater salinity changes, San Joaquin Valley, California, USA
Trends in concentrations of nitrate and total dissolved solids in public supply wells of the Bunker Hill, Lytle, Rialto, and Colton groundwater Subbasins, San Bernardino County, California: Influence of legacy land use
Variations on a method for evaluating decadal-scale changes in the groundwater quality of two GAMA coastal study units 2004-14, California GAMA Priority Basin Project
Status and trends of orthophosphate concentrations in groundwater used for public supply in California