After disinfecting, what is an important step to take with the well?

After disinfecting a well, it is essential to pump until evidence of chlorine is gone. This step ensures that any residual disinfectant, which may be harmful or affect the taste and safety of the water supply, is adequately removed before the well is put back into service. Chlorine is commonly used for disinfection, and it is important to eliminate it to prevent any adverse effects on the water quality and to ensure that the water is safe for use.

Pumping the well until the chlorine is no longer detectable guarantees that the water being delivered is clean and free from excess disinfectant. This process is critical in maintaining the well's safety and in protecting public health.

The other options do not directly address the immediate requirement of ensuring safe drinking water after disinfection. Sealing the well permanently would prevent its use altogether, which is not a practical consequence of disinfection. Leaving the well unattended could lead to potential contamination, and conducting an inspection, while a good practice, does not replace the necessity of ensuring that all disinfectant has been flushed out before the well is used again.