Daphnia Magna Stratus has been widely accepted as useful species for estimating the toxicity of chemicals to aquatic invertebrate and recommended as species for the testing chemicals from the international guideline as well as Korean guideline. The study was performed for the acute toxicity test by using water flea(D. Magna) for effluents from several wastewater treatment plants and drainage canals in GyeongBuk area. Five heavy metals, 1,4-Dioxane and Perchlorate were tested. Most Toxicity Units(TU) of Industrial wastewater effluents were less than 1 which means effluent was not toxic to D. Magna. However, effluents containing 1,4-Dioxane and Perchlorate were significantly toxic to D. Magna. Therefore, facilities should reduce the 1,4-dioxane since new regulations will force them after the year of 2011.

Abstract
 1. 서 론
 2. 자료 및 방법
  2.1. Daphnia Magna (D. Magna)
  2.2. 배양
  2.3. EC50을 구하기 위한 실험방법
  2.4. 생태독성도 조사방법
  2.5. 공단배수 및 공장배출수 시료채취
  2.6. 분석방법
 3. 결과 및 고찰
  3.1. 목적물질에 대한 D. Magna의 민감도 검사
  3.2. 경북지역 공단배수로의 생태독성도 조사
  3.3. 1,4-Dioxane의 독성도 조사
  3.4. Perchlorate의 독성도 조사
 4. 결 론
 참 고 문 헌

• 박동규(경상북도 보건환경연구원 수질조사과) | Dong Gyu Park (Water Quality Research Section, GyeongSangBukdo Government Public Institue of Health & Environment)
• 배헌균(계명대학교 환경대학 지구환경학과) | Hun-Kyun Bae (Department of Global Environment, Keimyung University) Corresponding Author