Water chemistry data from: Ingebritsen, S.E., Mariner, R.H., Cassidy, D.E., Shepherd, L.D., Presser, T.S., Pringle, M.K.W. and White, L.D., 1988. Heat-flow and water-chemistry data from the Cascade Range and adjacent areas in north-central Oregon. US Geological Survey Open-File Report 88-702, 205 p., https://doi.org/10.3133/ofr88702. Water chemistry data was digitized for 889 samples. Reported attributes include: Sample name, Type, Collection date, Reported location, Reported latitude, Reported longitude, Region, State, Latitude, Longitude, Location resolution, Location error, Elevation, Source, Collection depth, Discharge, Temperature, pH, Boron (B), Calcium (Ca), Chloride (Cl), Fluoride (F), Bicarbonate (HCO3), Potassium (K), Lithium (Li), Magnesium (Mg), Sodium (Na), Silica (SiO2), Sulfate (SO4), Cations, Anions, Salinity, Charge balance, Specific conductance, Isotopic composition of hydrogen (Delta 2H), Isotopic composition of oxygen in water (Delta 18O H2O), Author comment, Digitizer comment. Data was digitized from Tables 3, 4, 5, and 6. The following tables were not digitized: Table 1: Heat flow data. Table 2: Thermal conductivity measurements and summary statistics.