All drinking water must be filtered.

所有饮用水必须经过过滤。

《牛津词典》

Current EPA regulations say that more than 90 contaminants must be filtered out of drinking-water systems, said Cynthia Dougherty, director of EPA's Office of Groundwater and drinking water.

环保局负责地下水及饮用水的办公室主任辛西娅·多尔蒂表示，环保局已有规定要求90%的污染物必须从饮用水系统中过滤除去。

youdao

There is more pollution linked to fuels and the drinking water is compromised, we should not forget that many villages rely on the water from the canal, which is filtered underground to drink.

有许多的污染是燃料所造成，而且会影响饮用水质，我们不要忘记许多村民，必须仰赖运河里的水过滤饮用。

youdao

While the source of water currently received by the Hubli-Dharwad Municipal Corporation is filtered, sewage leakage and the poor management of waste often contaminates drinking water on its way into the homes.

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