Which of the following is not a common source of drinking water?

The pH of water is a measure of its

Pure water is neutral, meaning it is neither an acid nor a base. Pure water has a pH of

Hard water contains high levels of

The first step in treating water from a river or lake is usually

The amount of one substance in a certain volume of another substance is its

Why is chlorine added to drinking water?

What enables water to move through a system of pipes?

Household wastewater and the wastes in it are called

Many homes that are not connected to public sanitary sewers might dispose of sewage using a(n)

A condition in which an area with normally good precipitation gets scares rainfall for a few years is a

Using a resource wisely so that it will not be used up is called

The process of obtaining fresh water from salt water is called...

Which of the following is a way to conserve water?

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