Lead Contamination in Drinking Water Systems

What is the primary reason lead is considered dangerous in drinking water systems?

• It is inexpensive and easy to source.

• It has been used since ancient Roman times.

• It is a potent, irreversible neurotoxin harmful to humans, especially babies and young children.

• It is malleable and easy to work with.

What significant event in 2016 highlighted the dangers of lead in water?

• The discovery of lead in Roman plumbing systems.

• The implementation of new water treatment technologies.

• The increase of blood-lead levels in children in Flint, Michigan, due to changes in the water source.

• A global conference on water safety.

According to the article, why is there no safe level of lead in the human body?

• Lead is easily absorbed by the body.

• Medical and public health experts agree on its safety.

• It is not detectable in small quantities.

• It is a potent neurotoxin with irreversible effects.

What percentage of the U.S. population was reported to drink from water systems with detectable levels of lead between 2018 and 2020?

• 12%

• 56%

• 75%

• 33%

According to the NRDC survey mentioned in the text, how many lead service lines are estimated to be currently in use across the United States?

• 6 to 10 million

• 12 to 15 million

• 5 to 8 million

• 10 to 12 million

As per the document, the Flint water crisis highlighted issues at which levels of government?

• City and state only

• Federal and state only

• City, state, and federal

• Local and international

What is the estimated lifespan of lead pipes according to the text?

• 25 to 50 years

• 75 to 100 years

• 100 to 125 years

• 50 to 75 years

What is the primary reason lead can dissolve or flake into tap water?

• High water pressure

• Corrosion of plumbing pipes and fixtures containing lead

• Natural mineral content in the water

• Use of chlorine in water treatment

Which of the following is NOT listed as a common source of lead in plumbing?

• Lead service lines

• Lead-soldered joints

• PVC piping

• Plumbing fixtures

According to the Safe Drinking Water Act amendment, what change occurred in 1986 regarding plumbing?

• Lead pipes were completely banned

• "Lead-free" solder was mandated for use in plumbing

• All old lead pipes had to be replaced

• Water treatment plants were required to remove lead