The objective of this study was to investigate ELF-MF exposure levels in infant living environmental spaces at daycare centers. To achieve the objective of the study, we surveyed ELF-MF levels using EMDEX II at daycare centers from October 2013 to October 2014. The ELF-MF level of 53 daycare centers in terms of arithmetic mean (AM) and geometric mean (GM) were 0.59 ± 0.76 mG and 0.33 mG, respectively. And the ELF-MF level of 260 daycare center classrooms was 0.50 ± 0.71 mG (GM: 0.28 mG). The exposure levels of ELF-MF for all daycare centers were far below the recommended standards cited in guidelines in Korea (833 mG) and international reference levels proposed by WHO or ICNIRP (2,000 mG). Furthermore, we discovered out that as distance increased, ELF-MF emission levels decreased significantly in all electrical instruments. Below the 2 mG ELF-MF levels when an electrical instrument moved away stage 1 (Grade). Thus, these results will provide useful data for the determination of ELF-MF management and reduction methods at infant daycare centers.

1. 서 론
 2. 연구방법
  2.1 연구대상
  2.2 ELF-MF 측정 및 방법
  2.3 통계분석 및 정도관리
 3. 연구결과
  3.1 어린이집 ELF-MF 노출량
  3.2 어린이집 교실별 ELF-MF 노출량
  3.3 어린이집 사용 가전기기
  3.4 이격거리에 따른 가전기기 ELF-MF 방출량
 4. 결 론
 References

• 정준식(국립환경과학원 환경기반연구부 생활환경 연구과) | Joon-sig Jung
• 이재원(국립환경과학원 생활환경연구과) | Jae-Won Lee (Indoor air and noise Research division, National Institute of Environmental Research)
• 권명희(국립환경과학원 생활환경연구과) | Myung-Hee Kwon (Indoor air and noise Research division, National Institute of Environmental Research)
• 김부욱(근로복지공단 직업성폐질환연구소) | Boo-Wook Kim (Occupational Lung Diseases Institute, Korea Workers’ Compensation and Welfare Service)
• 김윤신(한양대학교 보건학과) | Yoon-Shin Kim (Department of Public Health, Hanyang University)
• 홍승철(인제대학교 보건안전공학과) | Seung-Cheol Hong (Department of Occupational Health & Safety Engineering, Inje University) Corresponding author