How close must a certified operator live to operate remotely?

• A. 100 miles by ground
• B. 300 miles by air
• C. 400 miles by ground
• D. 200 miles by ground

Answer: (D)

Proximity to the system is the main idea: a certified operator must be able to reach the site quickly enough to respond to alarms, perform required inspections, and take corrective actions when needed. The distance limit of 200 miles by ground is set to ensure timely, in-person response while still allowing the operator to work remotely and monitor controls from a distance. Traveling farther would delay needed actions, which can affect water quality, system reliability, and regulatory compliance. Travel by air isn’t the practical method for routine response, so options involving longer distances or air travel don’t fit. Hence, living within 200 miles by ground best fits the expectation for remote operation while preserving the ability to respond promptly.