Which of the following is a condition that must be adhered to when drilling a new well?

When drilling a new well, compliance with existing water control regulations is crucial. These regulations are in place to ensure the protection of groundwater resources, safeguard public health, and maintain the integrity of water supply systems. Proper adherence to these laws helps prevent over-extraction, contamination, and conflicts between water users.

While it may be possible to drill a well without supervision, this does not ensure adherence to safety and regulatory requirements, making it a less viable option. Similarly, while manually operated equipment is sometimes used, it is not a requirement and depends on various factors such as the well's depth and geology. Additionally, the timing of drilling is regulated to prevent interference with existing water systems and to consider ecological impacts, so drilling is not unrestricted throughout the year. Thus, compliance with water control regulations is the central tenet of responsible and lawful well drilling practices.