Massachusetts Plumbers Journeyman Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

The correct answer is that cross connections between potable water systems and other substances are prohibited except when approved by the Massachusetts Department of Environmental Protection. This agency is responsible for enforcing regulations that ensure the safety and quality of drinking water in Massachusetts. They have the authority to evaluate and approve requests for cross connections, ensuring that public health is not compromised.

Cross connections can lead to contamination of potable water supplies, making it essential that any exceptions to their prohibition be carefully regulated by a knowledgeable authority. The Massachusetts Department of Environmental Protection has the expertise to understand the implications of such connections and can set guidelines or conditions under which they may be allowed, ensuring they are managed safely.

Local county authorities and the Department of Public Works may have roles in water management and infrastructure but do not have the specific legal authority over water quality standards as the Massachusetts Department of Environmental Protection does. Similarly, while the Environmental Protection Agency influences water quality standards at a national level, state-level regulations must often be followed, making the state environmental agency the one that directly handles these types of approvals.