Which of the following is the highest listed blood lead threshold?

Which of the following is the highest listed blood lead threshold?

• A. 50 ug/dL
• B. 5 ug/dL
• C. 40 ug/dL
• D. 25 ug/dL

Answer: (A)

Blood lead thresholds are the levels that trigger action or further investigation, measured in micrograms per deciliter. Among the values given, the largest one is fifty micrograms per deciliter, so it’s the highest threshold listed. That means actions would be triggered at a higher level compared to the other numbers, since a bigger threshold corresponds to a less conservative trigger. The other values you see—forty, twenty-five, and five micrograms per deciliter—are all lower, so they would indicate actions at lower lead levels. In real-world practice, inspectors focus on much lower levels to protect health, especially for children, but the question is simply about identifying the highest number shown.

Blood lead thresholds are the levels that trigger action or further investigation, measured in micrograms per deciliter. Among the values given, the largest one is fifty micrograms per deciliter, so it’s the highest threshold listed. That means actions would be triggered at a higher level compared to the other numbers, since a bigger threshold corresponds to a less conservative trigger. The other values you see—forty, twenty-five, and five micrograms per deciliter—are all lower, so they would indicate actions at lower lead levels. In real-world practice, inspectors focus on much lower levels to protect health, especially for children, but the question is simply about identifying the highest number shown.