For instance, simple filtration and disinfection of water at the household level dramatically improves the microbial quality of water, and reduces the risk of diarrhoeal disease at low cost.

例如，在家庭层次水的简单过滤和消毒可显著改善水的微生物质量和以低成本减少腹泻病的危险。

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Poor water quality and lack of adequate sanitation has increased the risk of communicable diseases such as diarrhoeal illness and measles.

质量低劣的水质和缺乏适当的卫生条件增加了腹泻病和麻疹等传染病的风险。

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The theme of this year's World Water Day, “Clean Water for a Healthy World”, emphasizes that both the quality and the quantity of water resources are at risk.

今年世界水日的主题是“保障清洁水源，创造健康世界”，强调水资源质量和数量都面临威胁。

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The main beach in Weston-super-Mare received a pass in the MCS Good Beach Guide study, which focuses entirely on water quality standards and the risk of sewage pollution.

BBC: Weston Uphill Slipway beach fails water quality standard

Water quality issues also create risk for companies, from stricter pollution standards on their own effluent to other entities polluting water upstream, requiring them to clean up water prior to use.

FORBES: A New Tool To Manage Companies' Growing Water Risks