This study was investigated twenty two hazardous chemicals compounds for effluents of nine sewage treatment plants (STPs) and one waste water treatment plant (WWTP) in the Nakdong Ri-ver Basin. They are eleven phthalates(DMP, DEP, DIBP, DBP, BEEP, DNPP, DHP, DCP, DEHP, DNOP, Dinonyl phthalate, seven aliphatic hydrocarbons(n-Tridecane, n-Tetradecane, n-Pentadecan-e, n-Hexadecane, n-Heptadecane, n-Octadecane, n-Nonadecane, Isoquinoline, 2-Chloropyridine, 2-N-itrophenol, and Benzophenone. The twenty two compounds were analyzed by gas chromatograp-hy mass spectrometry (GC/MS) with liquid-liquid extraction (LLE). Twenteen of twenty two subs-tances were detected. They were DMP, DEP, DIBP, DBP, DEHP, n-Tetradecane, n-Pentadecane, n-Heptadecane, n-Octadecane, n-Nonadecane, Isoquinoline and Benzophenone. Among these, DEHP, DEP and Benzophenone were most frequently observed. They were obtained as ND~36.881 ㎍/L, ND~0.950 ㎍/L, ND~2.019 ㎍/L, respectively. When the substances were calculated the average concentration at 10 points, the maximum average detection concentration was investigated at the Dalseocheon STP.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 시약 및 표준물질
  2.2. 전처리방법
  2.3. 분석조건
  2.4. 조사지점 및 조사시기
  2.5. 미량유해물질 Screening 및 조사항목 선정
  2.6. 검량선 작성
  2.7. 검출한계와 정량한계
 3. 결과 및 고찰
  3.1. 조사항목별 검출현황
  3.2. 조사시기별 검출현황
  3.3. 조사지점별 검출현황
  3.4. 조사지점별 검출물질의 농도분포율 비교
 4. 결 론
 참 고 문 헌

• 김경아(부산광역시 상수도사업본부 수질연구소) | Gyung-A Kim (Water Quality Institute, Busan Water Authority) Corresponding author
• 서창동(부산광역시 상수도사업본부 수질연구소) | Chang-Dong Seo (Water Quality Institute, Busan Water Authority)
• 이상원(부산광역시 상수도사업본부 수질연구소) | Sang-Won Lee (Water Quality Institute, Busan Water Authority)
• 류동춘(부산광역시 상수도사업본부 수질연구소) | Dong-Choon Ryu (Water Quality Institute, Busan Water Authority)
• 권기원(부산광역시 상수도사업본부 수질연구소) | Ki-Won Kwon (Water Quality Institute, Busan Water Authority)