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。

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.

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所有饮用水必须经过过滤。

All drinking water must be filtered.

《牛津词典》

据说这里河流的水源都是山泉，非常纯净，无需处理或者过滤就可以饮用。

Water from the local river comes from springs and is considered so pure that it is drunk without treatment or filtration.

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