Who is recognized as a professional sanitarian?

The recognition of a professional sanitarian is specifically associated with individuals who are formally registered by the Texas Department of State Health Services. This registration indicates that the individual has met the necessary education, training, and experience requirements to practice as a sanitarian, which includes a thorough understanding of public health principles, sanitation, and environmental health.

In contrast, those engaged in installing on-site sewage facilities or designing sewage systems, while they may possess valuable skills and knowledge, do not necessarily hold the professional designation of a sanitarian unless they have also fulfilled the criteria set by the Department of State Health Services. Volunteers inspecting facilities may contribute to sanitation efforts but lack the formal recognition and authority that comes with being a registered sanitarian. Thus, option A accurately reflects the definition and credentials associated with being a professional sanitarian.