Geothermal Water of Hot Springs in the Cascade Mountains can be divided into 3 groups, based on their mineral water content.
Group 1. Sodium Chloride Type
Group 1 is exhibited by neutral pH ranges from 7.2 to 8.5, with total dissolved solids average approximately 2,650 ppm (parts per million). Chlorine and sodium ions are dominant. Less significant amounts of ions such as carbonate, sulfur, calcium, silica, potassium and others are presented. Salted hot springs:
Group 2. Acid Sulfate Type
Group 2 waters are characterized by an acidic nature and low concentrations of dissolved solids, relative to their sulfur and silica concentration.
Group 3. Mixed Type
Group 3 includes the majority on mineral waters from the Cascade Mountains. Mixed type hot springs water is exhibited by pH ranges from 6.2 to 9.7, with total dissolved solids average approximately 1,620 ppc. Dominant ions are chlorine, sodium, carbonate and sulfur in the sulfate's form, less amounts of calcium, silica, potassium, magnesium, and boron. The temperature of hot springs water influences the amount of dissolved solids and gases. The higher the temperature, the greater water mineralization.
- Umpqua Hot Springs, OR
- Bagby Hot Springs, OR
- Backer Hot Springs, WA
- Bonneville Hot Springs, WA
- Harrison Hot Springs, BC Canada
- Hunt Hot Springs, CA
- Kennedy Hot Springs, WA
- Lester Hot Springs, WA
- Little Hot Springs, CA
- Meager Creek Hot Springs, BC Canada
- Pebble Creek Hot Springs, BC Canada
- Pitt River Hot Springs, BC Canada
- Skookumchuck Hot Springs, BC Canada
- Sloquet Hot Springs, BC Canada
- Sulfur Creek Hot Springs, WA
- Jackson Wellsprings, OR