Standards must be scientifically supported, understandable, measurable, and?

The emphasis on standards being enforceable highlights the necessity for regulations and guidelines that can be implemented and upheld in practice. For a standard to be effective, it must not only be based on scientific evidence and be easy to comprehend, but it must also have the capacity to be enforced by regulatory bodies. This means there should be clear procedures in place for monitoring compliance and addressing violations.

Enforceability ensures that the established standards can lead to meaningful action and accountability, making it possible to protect public health and the environment. A standard that cannot be enforced may lead to inconsistencies, non-compliance, and potentially harmful practices. Therefore, enforceability is a critical attribute that supports the overall integrity of environmental health practices.

In contrast, the other options do not capture this essential aspect of standards. While they may contribute to the characteristics of a good standard, they lack the necessary component of being actionable within legal and practical frameworks.