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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Considering Alternate Pathways of Drinking-Water Contamination: Evidence of Risk Substitution from Arsenic Mitigation Programs in Rural Bangladesh
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Considering Alternate Pathways of Drinking-Water Contamination: Evidence of Risk Substitution from Arsenic Mitigation Programs in Rural Bangladesh

机译：考虑饮用水污染的替代途径：孟加拉国农村砷缓解计划的风险替代证据

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摘要

Deep tubewells are a key component of arsenic mitigation programs in rural Bangladesh. Compared to widely prevalent shallow tubewells, deep tubewells reduce ground-water arsenic exposure and provide better microbial water quality at source. However, the benefits of clean drinking-water at these more distant sources may be abated by higher levels of microbial contamination at point-of-use. One such potential pathway is the use of contaminated surface water for washing drinking-water storage containers. The aim of this study is to compare the prevalence of surface water use for washing drinking-water storage containers among deep and shallow tubewell users in a cohort of 499 rural residents in Matlab, Bangladesh. We employ a multi-level logistic regression model to measure the effect of tubewell type and ownership status on the odds of washing storage containers with surface water. Results show that deep tubewell users who do not own their drinking-water tubewell, have 6.53 times the odds [95% CI: 3.56, 12.00] of using surface water for cleaning storage containers compared to shallow tubewell users, who own their drinking-water source. Even deep tubewell users who own a private well within walking distance have 2.53 [95% CI: 1.36, 4.71] times the odds of using surface water compared to their shallow tubewell counterparts. These results highlight the need for interventions to limit risk substitution, particularly the increased use of contaminated surface water when access to drinking water is reduced. Increasing ownership of and proximity to deep tubewells, although crucial, is insufficient to achieve equity in safe drinking-water access across rural Bangladesh.
机译：Deep Tubewells是孟加拉国农村砷缓解计划的关键组成部分。与普遍普遍的浅管相比，深管纤维减少了地下水砷暴露并在源头提供更好的微生物水质。然而，在这些更多远处源处的清洁饮用水的益处可能在使用点下的微生物污染水平较高。一种这样的潜在途径是使用污染的地表水来洗涤饮用水储存容器。本研究的目的是比较地表用水的普遍存在孟加拉国Matlab队列的499家农村居民的群体中的深层和浅层管制者中的洗涤饮用容器。我们采用了多级逻辑回归模型来测量TubeWell类型和所有权状态在用地表水的洗涤容器几率的效果。结果表明，与浅层管制的用户相比，使用其饮用水的少数少数赔率（95％CI：3.56,12.00）的液体水平的液体水（3.5％CI：3.56,12.00）有6.53倍的液体来源。甚至在步行距离内拥有私人私人的深管用户甚至有2.53 [95％CI：1.36,4.71]倍，与其浅层管道相比使用地表水的几率。这些结果突出了干预措施来限制风险替代，特别是当减少饮用水时污染的地表水的使用增加。虽然至关重要，避免对深管泥的所有权增加和邻近的所有权不足以在孟加拉国农村的安全饮用水中获得股权。

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