What is the designation for a state where there is a potential chemical agent threat?

The designation for a state where there is a potential chemical agent threat is indeed MOPP 0 or directed. MOPP, which stands for Mission Oriented Protective Posture, is a system used by the military to prepare soldiers for potential chemical or biological threats.

In the MOPP 0 or directed state, personnel are alerted to the possibility of a chemical agent threat, but they are not wearing any protective equipment unless a higher level of protection is directed by command. This stage is crucial for maintaining readiness without requiring full protective gear until it is confirmed or necessary.

The other MOPP levels indicate varying degrees of preparedness, with MOPP 1, MOPP 2, and MOPP 4 representing increasing levels of protective gear and readiness as the threat level escalates, which differs from the initial state of preparedness indicated by MOPP 0.