This study was performed to validate the shelf life of commercial sachet-packed drinking water produced in the Benin City metropolis, Edo State, Nigeria. Seven brands of sachet-packed water that were freshly produced by manufacturers were collected from respective factories and subjected to standard physicochemical and microbial tests. The colour of all water brands (0·0–5·6 HU) was within the limits recommended by the World Health Organization (WHO) (≤15 HU) while the temperature (26·9–28·4°C) was above the limits recommended by WHO (≤25·0°C). The pH reported in brands 1 and 6 at week 8 of storage was below WHO recommended limits (6·5–9·5). At week 8 of storage, brands 1 and 6 had HPC (3·97–4·70 log₁₀ CFU per ml) that were above WHO/National Agency for Food and Drug Administration and Control (NAFDAC) recommended limits (≤2 log₁₀ CFU per ml) while TCC (<1 MPN 100 ml⁻¹) in all brands were within recommended limits (≤10 MPN 100 ml⁻¹). No thermo-tolerant Coliforms and Cryptosporidium were present in all brands; though, Streptococcus faecalis was detected in brand 6. Based on WHO/NAFDAC specifications for the examined parameters, brands 1 and 6 were inferred to not comply with the recommended shelf life of 2 months (approximately 8 weeks). Hence, there is a need for strict compliance to NAFDAC-specified Good Manufacturing Practice by these processing factories to prevent probable adverse health effects.

中文翻译：

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验证在尼日利亚销售的 NAFDAC 认证的袋装饮用水品牌的保质期

本研究旨在验证尼日利亚埃多州贝宁市大都市生产的商业袋装饮用水的保质期。七个品牌的制造商新鲜生产的小袋装水是从各自的工厂收集的，并进行了标准的理化和微生物测试。所有水品牌的颜色（0·0-5·6 HU）均在世界卫生组织（WHO）推荐的范围内（≤15 HU），而温度（26·9-28·4°C）高于WHO推荐的限值（≤25·0°C）。1 号和 6 号牌号在储存第 8 周时报告的 pH 值低于 WHO 推荐的限值 (6·5–9·5)。在存储的第 8 周，品牌 1 和 6 具有 HPC（3·97–4·70 log ₁₀CFU/ml) 高于 WHO/国家食品药品监督管理局 (NAFDAC) 推荐的限值（≤2 log ₁₀ CFU/ml），而所有品牌的TCC（<1 MPN 100 ml ^-1）均在推荐限值内(≤10 MPN 100 ml ^-1 )。所有品牌均不含耐热大肠菌群和隐孢子虫；但是，在品牌 6 中检测到粪链球菌。根据 WHO/NAFDAC 对检查参数的规范，推断品牌 1 和 6 不符合 2 个月（约 8 周）的建议保质期。因此，这些加工厂需要严格遵守 NAFDAC 规定的良好生产规范，以防止可能的不利健康影响。