Environmental Protection Agency (EPA) Lead Risk Assessor Practice Exam

What is considered an elevated acceptable level of lead exposure in air in micrograms per cubic meter (ug/m3)?

1. 15 ug/m3

2. 25 ug/m3

3. 30 ug/m3

4. 50 ug/m3

The correct answer is: 30 ug/m3

The elevated acceptable level of lead exposure in air is considered to be 30 micrograms per cubic meter (ug/m3). This threshold is significant because it represents the point above which lead concentrations can pose potential health risks to humans, especially vulnerable populations such as children and pregnant women. Understanding lead exposure is critical in risk assessment, particularly in urban environments or areas near industrial activities where lead might be released into the atmosphere. Sustained levels of lead exposure above this threshold can lead to various health problems, including cognitive and developmental issues in children, and cardiovascular problems in adults. Thus, maintaining lead levels below this threshold is crucial for public health and safety, aligning with regulations and guidelines set forth by environmental protection agencies.