Water and gas chemistry data from: Nathenson, M., and Mariner, R.H., 2013, Springs, streams, and gas vent on and near Mount Adams volcano, Washington: U.S. Geological Survey Scientific Investigations Report 2013–5097, 19 p., http://pubs.usgs.gov/sir/2013/5097/. Water chemistry data was digitized for 85 samples. Reported attributes include: Sample name, Sample ID, Type, Collection date, Reported location, Reported latitude, Reported longitude, State, Latitude, Longitude, Location resolution, Location error, Elevation, Source, Discharge, Temperature, pH (field), Aluminum (Al), Arsenic (As), Boron (B), Barium (Ba), Calcium (Ca), Chloride (Cl), Copper (Cu), Fluoride (F), Iron (Fe), Bicarbonate (HCO3), 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), Author comment. Gas chemistry data was digitized for 21 samples. Reported attributes include: Sample name, Sample ID, Type, Collection date, Reported latitude, Reported longitude, Reported Easting, Reported Northing, Region, State, Latitude, Longitude, Location resolution, Location error, Elevation, Source, Temperature, Total gas, Argon (Ar), Ethane (C2H6), Methane (CH4), Carbon dioxide (CO2), Hydrogen (H2), Hydrogen sulfide (H2S), Helium (He), Nitrogen (N2), Oxygen (O2), Isotopic ratio of helium (3He/4He), Isotopic composition of carbon in carbon dioxide (Delta 13C CO2), Digitizer comment. Data was digitized from Tables 1, 2, and 3. All data is included.