[논문]강원도 횡성지역의 지하수 수질 모니터링 및 인체 위해성 평가

강승혜; 김기태

doi:10.5668/jehs.2021.47.4.356

[국내논문] 강원도 횡성지역의 지하수 수질 모니터링 및 인체 위해성 평가
Water Quality Monitoring and Risk Assessment for Groundwater at Hoengseong, Gangwon-do Province 원문보기

韓國環境保健學會誌 = Journal of environmental health sciences, v.47 no.4, 2021년, pp.356 - 365

강승혜 (서울과학기술대학교 에너지환경공학과) , 김기태 (서울과학기술대학교 에너지환경공학과)

Abstract ▼ AI-Helper

Background: Concerns have been raised regarding the criteria of groundwater, in particular in Gwangwon-do Province where many residents drink groundwater due to the poor supply of tap water and a high nonconformity rate with water quality criteria nationwide. Objectives: Water quality monitoring and risk assessment were conducted for groundwater in Hoengseong, Gangwon-do Province. Methods: A total of 46 items required for meeting drinking water criteria were analyzed from 258 samples collected from March 2017 through August 2018 (152 sites in 2017 and 106 sites in 2018). Risk assessment was conducted for two non-carcinogens (F- and NO3-N), and one carcinogen (i.e., arsenic) based on their high nonconformity to water quality criteria. Results: Water quality analysis revealed that the total proportion of nonconformities was determined to be 27.9%. The nonconformity rate for each content item is as follows: total colony counts (1.6%), total coliform (6.2%), Escherichia coli (1.2%), F- (8.1%), arsenic (4.7%), NO3-N (8.1%), pH (1.2%), manganese (0.4%), and turbidity (5.8%). Risk assessment indicated that fluoride induced a hazard quotient greater than 1 with the 95% UCL (Upper Confidence Limit) concentration of the total 258 sites and average, median, and 95% UCL concentrations of nonconformity sites. For NO3-N, there was no human health risk. For arsenic, the excess cancer risk exceeded the acceptable cancer risk of 1×10-6 with the average and 95% UCL concentrations of total 258 sites and average, median, and 95% UCL concentrations of nonconformity sites. Conclusions: This study suggests that it is necessary to expand water quality monitoring of groundwater and conduct a more detailed risk assessment in order to establish a health care plan for the residents of Hoengseong, Gangwon-do Province.

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표/그림 (7)

표 Table 1. Number of sampling sites collected for two years of 2017 and 2018 in nine compartments at Hoengseong (A~I)
표 Table 2. Information of instruments and reference materials used for chemical analysis of 16 inorganic, 3 aesthetic, and 17 organic compounds
표 Table 3. Number of sites for detected miroorganisms (general bacteria, total count of coliform group, escherichia coli) and their detection frequency (%) among total number of sampling sites selected in nine compartments at Hoengseong (A~I)
표 Table 4. Number of sites, detection frequency (%), and the minimum, average, maximum concentration for F^-, NO_3^-N, and Arsenic in nine compartments at Hoengseong (A~I)
표 Table 5. Total number and total percent of nonconformity in nine compartments at Hoengseong (A~I)
그림 Fig. 1. Average concentration of F^-, NO_3^-N, Arsenic, and Turbidity of nonconformity areas in nine compartments at Hoengseong (A~I). *Drinking water criteria : F^- (1.5 mg/L), NO_3^-N (10 mg/L), Arsenic (0.010 mg/L), Turbidity (1 NTU)
표 Table 6. Risk assessment based on average, median, and 95% Upper Confidence Limit (UCL) concentration of F^-, NO_3^-N, Arsenic for total (258 sampling sites) and nonconformity sites

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