Is There Chlorine in Your Drinking Water?

Chlorine in drinking water helps keep people safe from a variety of water-borne illnesses and is a cost-effective way to treat large municipal water supplies. However, it can also change the taste of water. Plus, constant quality control is required to make sure chlorine levels in water don’t reach unsafe amounts that could cause negative health effects.

So should you serve drinking water with chlorine to your employees? Test your knowledge of chlorine in drinking water and get recommendations on the best type of beverages to serve at your office.

What is NOT an advantage of treating drinking water with chlorine?

Reduced bacteria

Less contaminants

Complete protection against protozoa

Protection against recontamination

When did the US begin using chlorine to treat drinking water?

1908

1912

1904

1899

Treating water with chlorine protects against all of the following illnesses except:

Typhoid

Cholera

Hepatitis

Cryptosporidiosis

When is chlorine added to water during the treatment process?

Prior to filtration and after sedimentation

Immediately after it enters the treatment facility

As the final step of treatment

It can be added at any of these points

What is the most commonly used process for treating municipal water supplies in the US?

Reverse osmosis

Chlorination

Distillation

UV sterilization

Chlorine can combine with organic matter in water during treatment to form harmful compounds called...

Residual compounds

Disinfection byproducts

Chloro-compounds

Trace contaminants

Why does some bottled water contain chlorine?

It's taken from municipal water supplies

Some companies add it to their product

The EPA requires all water to be treated with chlorine

Some plastic bottles are produced using chlorine

What is chlorine's natural state?

Solid

Liquid

Gas

Which state first used chlorine to treat their water supply?

Pennsylvania

Virginia

Delaware

New Jersey

According to the CDC, what is the maximum amount of chlorine water can contain and still be safe to drink?

2 mg

4 mg

6 mg

8 mg

How do bottleless water coolers remove sediments, contaminants, and bad tastes from drinking water?

By adding healthy bacteria

Using underground water supplies

Treatment with chlorine and fluoride

Advanced water filtration systems with mineral addback

Which of the following water sources is the most likely to contain chlorine

Spring water

Bottled water

Mineral water

Distilled water

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