Pure water is water that contains:

The source of salt in Earth's oceans is:

The range of pH for most surface water is from

This element is present in older pipes and pipe solder, and if dissolved in water is toxic at very low concentrations.

These chemicals can get into water from fertilizer, septic systems, and farm runoff. They contribute to the growth of algae.

Hard water is water that contains:

List two chemicals that water treatment facilities add to drinking water.

The government agency that sets the standards for clean water is the

A mineral dissolved in water may exist as a charged element or moelecule called a(n)

What does the turbidity test measure?

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