| Contamination status of groundwater used as livestock drinking in beef and dairy cattle farms, Korea |
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Yangho Jang1, Soojin Lee1, Hyobi Kim1, Jeonghak Lee2, Manho Lee2, Hyekyoung Gil2, Nonghoon Choe1 |
1College of Veterinary Medicine, Konkuk University
2Seoul Research Institute of Public Health and Environment |
| 국내 소사육농가의 자가용 가축음용수 오염실태 평가조사 |
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장양호1, 이수진1, 김효비1, 이정학2, 이만호2, 길혜경2, 최농훈1 |
1건국대학교 수의과대학
2서울시 보건환경연구원 |
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| Abstract |
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In Korea, groundwater is main water source in livestock farms. Most dairy and cattle farms have constructed their own wells for human drinking and livestock farming. However, these private residential wells have not been controlled by government and also there was scant study about livestock drinking water quality. Therefore this study was to monitor of the livestock farms' groundwater quality in Korea. Water samples were collected at 123 dairy and cattle farms and were analysed forty six substances with quality standard for drinking water approved by the Minister of Environment. Seventy eight (63.4%) of 123 samples failed to drinking water stand a test. The most frequent contaminants were nitrate-nitrogen and microbial. 22.8% (n=28) of samples showed nitrate-N concentration of higher than 10 mg/L meant that can't be used drinking water for human and the Nitrate-N concentration analysed in the range of 0.2 to 61.2 mg/L. All of 78 failed to drinking samples had microbial problems, especially 5.7% (n=7) of samples indicated water could be contaminated by feces. Other contaminants detected were zinc and evaporation residue. Especially detected zinc concentration (32 mg/L) was about ten times higher than standard of zinc (3 mg/L). Regression analysis indicated that groundwater pH did not influence to nitrate-N concentration but the hardness and chloride could affect to nitrate-N concentration in the groundwater. Most livestock farms were adjacent to crop farmland in Korea. This could cause contamination of groundwater with nitrate-N and pesticide that could accumulate livestock product. Moreover Heavy metal such as zinc and copper could be released from a corrosive plated water pipe in livestock farm. Put together, Korea livestock system is indoor, not pasture-based, hence livestock could be exposed to potential contaminated water consistently. Therefore on the basis of these data, appropriate livestock drinking water quality standards should be prepared to keep livestock healthy and their product safe. Further, livestock drinking water quality should be monitored continuously in suitable livestock drinking water standards. |
| Key Words:
groundwater contamination, livestock drinking water quality, microbial contamination, $NO_{3}-N$ |
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