The Primary Drinking Water Regulations do not apply when it meets all of the following conditions.

• A. Consists only of distribution and storage facilities; obtains all water from a public water system but is not owned or operated by it; does not sell water to any persons; and is not a carrier which conveys passengers in interstate commerce.
• B. It consists only of distribution and storage facilities.
• C. It obtains all water from a public water system but is not owned or operated by that system.
• D. It does not sell water to any persons.

Answer: (A)

Primary Drinking Water Regulations apply to public water systems that deliver drinking water to the public. Some facilities are exempt if they only handle distribution and storage and never treat the water, and if they meet additional conditions. When a facility consists solely of distribution and storage, obtains all water from a public water system, is not owned or operated by that system, does not sell water to anyone, and is not a carrier that moves passengers across state lines, it is not considered a public water system itself and the regulations do not apply. This is why the full set of conditions in the choice is the best fit for exemption—the other options don’t meet all those criteria at once.