When water is scarce, people are often forced to rely on drinking water sources that may not be safe.

在缺水时，民众通常被迫依靠可能不安全的饮用水源。

youdao

Drinking water sources in central Xinjiang cities mainly consist of rivers, reservoirs and underground water.

新疆城市饮用水源可分为河流、水库和地下水三种类型。

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Hexaalent chromium compounds are often used in electroplating leather tanning and textile manufacturing and hae been found in some drinking water sources.

六价铬化合物常用于电镀，制革及纺织制造，还存在于一些饮用水水源中。

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We must be extra vigilant, The government must play its role as to make the environment safe and remove all environmental factors cancer. (OMITTED) Good sources of drinking water, he says,will stop people from going to streams and ponds, where they get infected with some of these organisms.

VOA: standard.2010.06.16

And that fracking can cause natural gas to migrate into drinking water sources.

FORBES: China Closer To Joining Shale Gas Fracking Craze

Nearly 1 billion people still do not have access to improved sources of drinking water and there are more people without access to tap water in cities today than there were at the end of the 1990s.

UNESCO: CULTURE