The state-accredited therapeutic water

The various spa facilities within the Claudius Therme are supplied with state-accredited therapeutic water. This therapeutic water is created in the Bergisches Land region. The water flows through 350 million-year old limestone and dolomite rock in underground chasms. As a result of the thermal flux within the earth, it is heated and transformed into thermal water.

At great depths of between 300 and 1500 m, it encounters bodies of water which are rich in sodium chloride, and which are connected to the deep salt deposits in the lower Rhine region. Here, it becomes enriched with the plentiful free carbon dioxide which is still present from the Lacher See's active volcanic period some 11,000 years ago.

The special geological structure of the Rhine basin and the Bergisches Land region, and the volcanicity of the mid-Rhine area, are therefore responsible for the outstanding quality of Cologne's thermal water. This water occurs naturally, and is continuously replenished. It can therefore be obtained in sufficient volumes with constant quality.

The Claudius Therme obtains its state-accredited therapeutic water from its own two springs (1027 m and 364 m deep). This serves the purpose of prophylaxis and the maintenance of our guests' health. In addition, the special properties of the medicinal water can also be used to specifically support certain therapies in the form of spa health cures, drinking health cures and inhalations.

Chemical analysis

1 kg therapeutic water contains:

Cations:	Sodium	3,757.00 mg
	Potassium	89.90 mg
	Ammonium	5.58 mg
	Magnesium	318.60 mg
	Calcium	608.10 mg
	Manganese(II)	0.69 mg
	Iron	4.25 mg
	total	4,783.82 mg
Aniones:	Chloride ion	5,902.00 mg
	Sulphate	754.80 mg
	Hydrogen carbonate	2,471.00 mg
	total	9,127.80 mg
Undissociated components:	Silicic acid	16.60 mg
Gaseous components:	Free carbon dioxide	1,538.00 mg

(Excerpt from the analysis of, and the export report regarding, the water from "Exhibition centre spring III" in Cologne, carried out by the Fresenius chemical laboratory.)