Final answer:
An accurate answer requires statistical data from a reliable source such as governmental reports or health department census. Without this specific information, we cannot determine the exact percent of local health departments serving over 500,000 people.
Step-by-step explanation:
The question pertains to the percent of local health departments serving populations over 500,000. This question likely arises from a broader study of health department demographics or possibly in the context of health administration or public health. To answer this, we need to refer to a specific source such as a governmental report, a health department census, or similar statistical data. Since no concrete data has been provided in the reference material, and it does not directly answer the question about the percentage of health departments serving large populations, a precise answer cannot be given without the correct statistical information. Typically, such information would be available from sources like the Centers for Disease Control and Prevention (CDC) or respective state and local health department resources. It's worth noting that a significant majority of local health departments serve smaller populations, which suggests that a smaller percentage would cover populations over 500,000.