Which regulation specifies the health and sanitation requirements for drinking water?

The regulation that specifies the health and sanitation requirements for drinking water is 1926.27. This standard is part of OSHA's regulations concerning safety and health in the construction industry, and it specifically addresses sanitation facilities, which includes requirements for providing clean drinking water at construction sites. Ensuring access to potable water is critical for worker safety and health, as it helps prevent dehydration and related health issues, particularly in environments where workers may be exposed to excessive heat or demanding physical labor.

The other choices relate to various safety and health standards but do not specifically address drinking water requirements. For example, 1926.21 pertains to safety training and education, 1926.28 addresses personal protective equipment, and 1926.50 outlines general requirements for first aid and medical services. Each of these plays an important role in maintaining worker safety but does not specifically focus on the health and sanitation needs associated with drinking water.