Which method would likely be least effective in informing a wide audience about septic regulations?

Word of mouth is often the least formal method of disseminating information and can significantly limit the reach of critical messages like septic regulations. While it relies on personal interactions and can be effective within small groups or local communities, it lacks the structured approach needed to ensure a broad audience is reached. Information conveyed through word of mouth can easily be misinterpreted or forgotten, and it heavily depends on individuals taking the initiative to pass along the information.

In contrast, community forums provide a platform for broader discussion and engagement where information can be shared more officially and comprehensively. Direct mail campaigns allow for targeted communication to specific households, ensuring that the intended audience receives the information directly. Online surveys, while focused on gathering feedback, also generate information that can be widely shared if tied to broader communication strategies. Therefore, compared to these methods, word of mouth is generally less effective in raising awareness on septic regulations across a wide audience.