Groundwater geochemistry nutrient data, collected between November 2017 and March 2019. The dataset includes: Sample Name, Well ID, Longitude (dd), Latitude (dd), Time Stamp, pH, Temperature (C), Specific Conductance (uS/cm), Salinity, Dissolved oxygen (% and mg/L), Si (ug/L), PO4 (ug/L), NO3 & NO2 (ug/L), NH3 & NH4 (ug/L), TP (ug/L), TN (ug/L), and alkalinity (mg/L).