ONSEN TOPHot Spring Encyclopedia„What is Hot Spring?
@
@

ŸWhat is Hot Spring?

It is defined by the Hot Spring Bill passed in 1948.

1 The water that wells out of the earth.
2 The water that is hot, steam, gas or contains minerals. (except the natural gas which mainly contains hydrocarbon)
3 The water temperature exceeds 25Ž at the source, or contains the following properties more than prescription.

–If it is over 25Ž, defined as Hot Spring without any other conditions.
–If it is under 25Ž, only when it contains the following properties more than prescription, defined as Hot Spring

Classification of Mineral Springs Definition of Mineral Springs

i1jClassification of Hot Springs

Temperature
Cold Mineral Spring Under 25Ž
Hot Spring Low Temperature Spring Over 25Ž under 34Ž
Hot Spring Over 34Ž under 42Ž
High Temperature Spring Over 42Ž


i2jClassification of Waters

Mineral Water classified by pH content just as it gushes out.

Acidity Under pH3
Weak Acidity Over pH3 under 6
Neutrality Over pH6 under7.5
Weak Alkalinity Over pH7.5 under 8.5
Alkalinity Over pH8.5

1DTemperature ijust as piped from the fountain.j: over 25Ž
2DProperties (one out of the following listsj
Name Contentiin 1kgj
Solute Materials(except gasj Total amt. over1,000mg
Free Carbon Dioxide Over 250mg
Lithium Ion Over 1mg
Strontium Ion Over 10mg
Barium Ion Over 5mg
Ferroion + Ferric Ion Over 10mg
Manganeseithe first manganese ionj Over 10mg
Hydrogen Ion Over 1mg
Bromine Ion Over 5mg
Iodine Ion Over 1mg
Fluoride Ion Over 2mg
Hydrogen Arsenate Ion Over 1.3mg
Metaarsenite Over 1mg
Sulfur Over 1mg
Metaboric Acid Over 5mg
Meta Silica Over 50mg
Sodium Bicarbonate Over 340mg
Radon Over 20~(the -10th power of 10) Curie Unit
iOver 5.5Mache Unitj
Radium Chloride (as Re) Over 1~(the -8th power of 10)mg
@
To ONSEN TOP @ @To Page Top
@