Noble Fountain (Hot)

A stone fountain with two iron eagles sitting atop a globe, next to a staircase leading to a trail.
The Noble Fountain on Reserve St.

NPS Photo/Mitch Smith

Quick Facts

Water - Bottle-Filling Station, Water - Non-Potable

Water averages 143º Fahrenheit/62º Celsius

Mineral content in parts per million (ppm)

Silica (SiO2) 53.0
Bicarbonate (HCO3) 130.0
Calcium (Ca) 47.0
Sulfate (SO4) 7.8
Magnesium (Mg) 4.9
Chloride (Cl) 2.2
Sodium (Na) 4.0
Fluoride (F) 0.26
Potassium (K) 1.4
Oxygen (O2) 4.5
Free Carbon Dioxide (CO2) 9.7

Radioactivity through radon gas emanation is 43.3 picocuries per liter.

Hot Springs National Park

Last updated: February 3, 2021