‘Jeju Samdasoo’ is groundwater obtained from volcanic aquifers located 420m deep in Mt. Halla, the national park of international recognition. Not only the taste of very refreshing and light, but also the quality is uniformed. Due to the natural self-purification characteristics unique to volcanic layer, water quality is very pure and clean. Jeju Samdasoo has satisfied the water quality test standards of FDA of US and Japanese Ministry of Welfare, thus has been recognized of its outstanding quality throughout the world. In order to maintain and control clean environment and safety of water quality, environmental watch and regular inspection is carried out on the status of changes in ecosystem and occurrence of pollutants in the surrounding areas of the pumping well. Professional experts and a variety of experimentation/ analysis devices have been secured to supply our customers with clean and fresh products containing the purity of nature, thus to actively respond to quality and hygiene management of the products. Jeju Provincial Development Corporation administers regular quality inspections to maintain and control the safety of water quality in protecting the health of our customers. Jeju Provincial Development Corporatio is also requesting water quality analysis each year on the basis of standard tests from nationally certified organizations, FDA of US and Japanese Ministry of Welfare to secure the safety of our water.