1. The Ministry of Environment, Republic of Korea, Domestic Wastewater Yearbook 2000, pp. 4–6.
2. Jeju Provincial Government, Comprehensive investigation of the geological features around water gate and the ground water resources in Jeju Island, 2001, pp. 53–58.
3. USGS, Guidelines for Interpretation of the Biological Effects of Selected Constituents in Biota, Water, and Sediment, National Irrigation Water Quality Program Information Report No. 3, 1989, p. 132.
4. Water Chemistry;Snoeyink,1980
5. Standard Methods for the Examination of Water and Wastewater,1995