Water and gas chemistry data from: Mariner, R.H. and Willey, L.M., 1976. Geochemistry of thermal waters in Long Valley, Mono County, California. Journal of Geophysical Research, 81(5), pp.792-800, https://doi.org/10.1029/JB081i005p00792. Water chemistry data was digitized for 11 samples. Reported attributes include: Sample name, Type, Collection date, Reported location, State, Latitude, Longitude, Location resolution, Location error, Temperature, pH, Arsenic (As), Boron (B), Calcium (Ca), Chloride (Cl), Alkalinity as carbonate (CO3), Fluoride (F), Hydrogen sulfide (H2S), Alkalinity as bicarbonate (HCO3), Potassium (K), Lithium (Li), Magnesium (Mg), Sodium (Na), Ammonium (NH4), Rubidium (Rb), 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), Digitizer comment. Gas chemistry data was digitized for 4 samples. Reported attributes include: Sample name, Type, Collection date, Reported location, State, Latitude, Longitude, Location resolution, Location error, Temperature, Total gas, Oxygen and argon (O2 + Ar), Methane (CH4), Carbon dioxide (CO2), Nitrogen (N2), Digitizer comment. Data was digitized from Tables 1, 3, and 4. The following tables were not digitized: Table 2: atomic ratios of major and minor elements. Table 5: qualitative indicators of aquifer temperature. Table 6: estimated aquifer temperature.