Water and gas chemistry; Washington, Oregon, and Northern California; 1970-1997: Mariner et al., 2003
Water and gas chemistry data from: 
Mariner, R.H., Evans, W.C., Presser, T.S. and White, L.D., 2003. Excess nitrogen in selected thermal and mineral springs of the Cascade Range in northern California, Oregon, and Washington: sedimentary or volcanic in origin?. Journal of volcanology and Geothermal Research, 121(1-2), …