Among them are those in Chojong-ri, Unchon County and Kanggyo-ri, Jaeryong County, South Hwanghae Province.

In particular, the spring water in Chojong-ri has been well-known from the year 1580. And it is called "Chojong", which means in English water with a fresh and spicy taste.

The mineral water, rich in ionized metal elements, is considered to be efficacious against chronic gastritis, duodenal ulcer, chronic enteritis and colitis, chronic hepatitis, pancreatitis, cystitis, hypertrophy, arthritis, etc.

It was registered as one of state natural monuments.

The mineral water in Kanggyo-ri is also rich in minerals like calcium carbonate, sodium, potassium, etc. with 150 cubic meters of daily yield.

Measures have been taken to supply those mineral waters to people on a regular basis.