Environmental Protection Agency (EPA) Model Lead Based Paint Risk Assessor Practice Test

What percentage of drinking water taps exceeding the lead level triggers mandatory regulations?

1. 50%

2. 70%

3. 90%

4. 100%

The correct answer is: 90%

The percentage of drinking water taps exceeding the lead level that triggers mandatory regulations is indeed set at 90%. This threshold reflects the guidelines established by the Environmental Protection Agency (EPA) to safeguard public health, specifically for communities with a significant risk of lead exposure through drinking water sources. When lead levels exceed this percentage, it indicates systemic issues with the water supply or distribution systems that pose a serious risk to public health, particularly for vulnerable populations such as children and pregnant women. The 90% threshold ensures that proactive measures are implemented, compelling water systems to take action to reduce lead concentrations. Understanding this percent is crucial for risk assessors, as it provides a clear metric for assessing exposure risks and informing necessary public health interventions.