Water Pollution & Wastewater Treatment

______________________ is the water that contains waste from home or industry.

• surface water

• dam

• potable

• wastewater

Waste water is best described as:

• Water that you can cook with.

• Water that goes down your drain or toilet.

• Water in a local pond.

• River water.

The bacteria that breakdown solids in wastewater work more quickly when:

• The wastewater has very little oxygen.

• The wastewater has lots of oxygen.

• The wastewater has lots of algae.

• The water is warmer.

What type of light is used to sterilize the water before it's released?

• infrared light

• red light

• ultraviolet (UV) light

• white light

Where is the treated water released to?

• It's added to the city's water tower

• It's released to the local waterways

• It's dumped on the ground

What type of living things eat the organic matter in the sewage?

• Plants

• Animals

• Bacteria

• Fungi

In which step is solid waste removed using screens?

• Primary treatment

• Secondary treatment

• Tertiary treatment

We should not throw paints and greasy substances down the drain because

• they break the pipe

• they harden and clog the pipe

• they flow through the drain freely

• None of these

What happens to the sewage in the first step of treatment?

• The organic matter is eaten by bacteria.

• The sewage water is aerated.

• It is screened to remove solid wastes.

• It is filtered and disinfected.

Cannot easily be traced to the source of the pollution.

• Point Source Pollution

• Non-point source pollution