Water and gas chemistry data from: Evans, W.C., van Soest, M.C., Mariner, R.H., Hurwitz, S., Ingebritsen, S.E., Wicks Jr., C.W. and Schmidt, M.E., 2004. Magmatic intrusion west of Three Sisters, central Oregon, USA: The perspective from spring geochemistry. Geology, 32(1), pp.69-72. https://doi.org/10.1130/G19974.1. Water chemistry data was digitized for 69 samples. Reported attributes include: Sample name, Sample ID, Type, Collection date, Reported Easting, Reported Northing, State, Latitude, Longitude, Location resolution, Location error, Elevation, Temperature, pH, Aluminum (Al), Arsenic (As), Boron (B), Barium (Ba), Bromine (Br), Calcium (Ca), Chloride (Cl), Cesium (Cs), Dissolved inorganic carbon as carbon (DIC as C), Fluoride (F), Iron (Fe), Alkalinity as bicarbonate (HCO3), Carbonic acid (H2CO3), Potassium (K), Lithium (Li), Magnesium (Mg), Manganese (Mn), Molybdenum (Mo), Sodium (Na), Nitrate (NO3), Lead (Pb), Phosphate (PO4), Rubidium (Rb), Silica (SiO2), Sulfate (SO4), Strontium (Sr), Uranium (U), Vanadium (V), Zinc (Zn), Cations, Anions, Salinity, Charge balance, Specific conductance, Isotopic composition of hydrogen (Delta 2H), Isotopic composition of oxygen in water (Delta 18O H2O), Isotopic composition of carbon in dissolved inorganic carbon (Delta 13C DIC), Tritium (3H), 14C. Gas chemistry data was digitized for 69 samples. Reported attributes include: Sample name, Sample ID, Type, Collection date, Reported Easting, Reported Northing, State, Latitude, Longitude, Location resolution, Location error, Elevation, Temperature, Dissolved oxygen (O2 dissolved), Isotopic ratio of helium corrected for the atmospheric isotopic composition of helium (3He/4He corrected). Data was digitized from Data Repository tables 1, 2, 3, 4, 5, and 6. All data is included.