True or False: Contaminant devices should be installed at the service connection in high hazard facilities.

The statement is true; contaminant devices should indeed be installed at the service connection in high hazard facilities. High hazard facilities are those where there is a significant risk of contaminants entering the drinking water supply due to the nature of their operations. This includes industrial sites, chemical plants, and facilities handling hazardous substances.

The rationale for having contaminant devices at the service connection is to ensure that any potential backflow of contaminants does not reach the public water system. These devices are designed to prevent the reverse flow of contaminated water from the facility back into the potable water supply, safeguarding public health and complying with regulatory standards.

In contrast, the claim that contaminant devices are only necessary in low hazard facilities, or that they should be implemented solely when mandated by law, undermines the crucial preventive measure these devices represent in high-risk situations. Hence, it is essential to prioritize the installation of these devices at service connections in environments where hazardous materials could potentially pollute water supplies.