When the water supply has been disrupted due to a natural disaster, an acceptable alternative is

During a water service interruption or emergency, a food establishment must cease operations or use an alternative water source that is approved and potable. Commercially bottled water is a universally accepted and safe source for drinking, food preparation, and essential cleaning. This ensures that no contaminated water is introduced into the operation, protecting public health. Other approved sources could include water from a supplier that is certified as safe or water transported in a sanitized, approved water transport vehicle.

B. A 50-50 bleach-to-water mixture is extremely toxic and would be lethal; emergency purification uses mere drops of bleach per gallon.

C. A private well could be contaminated by the same disaster and testing every two years is insufficient for ensuring safety.

D. Condensate water from an air conditioning system is not potable and can contain harmful bacteria, lead, and other contaminants.

1. ServSafe Manager Book, 7th Edition. National Restaurant Association. Chapter 10, "Safe Facilities and Pest Management," Page 10.11. "If the water is not safe to drink, you must use bottled water."

2. U.S. Food and Drug Administration (FDA). (2017). Food Code. Section 5-101.13, "Source, Water." Specifies that drinking water shall be obtained from an approved source. Section 5-104.11 details approved alternative water supplies during an emergency, including "commercially bottled drinking water."

3. Cornell University. (2006). Food Service Management Course FSM 4300. Lecture notes on Crisis Management. Emphasizes using bottled water or water from an approved tanker during a water main break or contamination event.